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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en-US">
<head>
<title>SOUL Reference Documentation</title>
<meta name="keywords" content="SOUL, audio, DSP"/>
<meta name="description" content="SOUL Reference Documentation"/>
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<link rel="stylesheet" href="souldoc_style.css"/></head>
<body>
<nav id="contents" class="contents">
<ul class="toc_item">
<li class="toc_module">
<a href="#lib_soul_library_intrinsics">Intrinsic functions</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_intrinsics">soul::intrinsics</a>
</li>
</ul>
</li>
<li class="toc_module">
<a href="#lib_soul_library_audio_utils">Miscellaneous audio utilities</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul">soul</a>
</li>
<li class="toc_item">
<a href="#mod_soul_audio_samples">soul::audio_samples</a>
</li>
<li class="toc_item">
<a href="#mod_soul_pan_law">soul::pan_law</a>
</li>
<li class="toc_item">
<a href="#mod_soul_smoother">soul::smoother</a>
</li>
</ul>
</li>
<li class="toc_module">
<a href="#lib_soul_library_notes">Musical note utilities</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_note_events">soul::note_events</a>
</li>
<li class="toc_item">
<a href="#mod_soul_voice_allocators">soul::voice_allocators</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_voice_allocators_Basic">Basic</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="toc_module">
<a href="#lib_soul_library_mixing">Mix and gain control utilities</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_mixers">soul::mixers</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_mixers_FixedSum">FixedSum</a>
</li>
<li class="toc_item">
<a href="#mod_soul_mixers_DynamicSum">DynamicSum</a>
</li>
<li class="toc_item">
<a href="#mod_soul_mixers_DynamicMix">DynamicMix</a>
</li>
</ul>
</li>
<li class="toc_item">
<a href="#mod_soul_gain">soul::gain</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_gain_FixedGain">FixedGain</a>
</li>
<li class="toc_item">
<a href="#mod_soul_gain_DynamicGain">DynamicGain</a>
</li>
<li class="toc_item">
<a href="#mod_soul_gain_SmoothedGainParameter">SmoothedGainParameter</a>
</li>
<li class="toc_item">
<a href="#mod_soul_gain_SmoothedGain">SmoothedGain</a>
</li>
</ul>
</li>
<li class="toc_item">
<a href="#mod_soul_envelope">soul::envelope</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_envelope_FixedAttackReleaseEnvelope">FixedAttackReleaseEnvelope</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="toc_module">
<a href="#lib_soul_library_noise">RNGs and noise-generators</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_random">soul::random</a>
</li>
<li class="toc_item">
<a href="#mod_soul_noise">soul::noise</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_noise_White">White</a>
</li>
<li class="toc_item">
<a href="#mod_soul_noise_Brown">Brown</a>
</li>
<li class="toc_item">
<a href="#mod_soul_noise_Pink">Pink</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="toc_module">
<a href="#lib_soul_library_timeline">Timeline event utilities</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_timeline">soul::timeline</a>
</li>
</ul>
</li>
<li class="toc_module">
<a href="#lib_soul_library_oscillators">Oscillators</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_oscillators">soul::oscillators</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_oscillators_phasor">phasor</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_oscillators_phasor_Processor">Processor</a>
</li>
</ul>
</li>
<li class="toc_item">
<a href="#mod_soul_oscillators_Sine">Sine</a>
</li>
<li class="toc_item">
<a href="#mod_soul_oscillators_poly_blep">poly_blep</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_oscillators_poly_blep_shapers">shapers</a>
</li>
<li class="toc_item">
<a href="#mod_soul_oscillators_poly_blep_Shape">Shape</a>
</li>
<li class="toc_item">
<a href="#mod_soul_oscillators_poly_blep_Processor">Processor</a>
</li>
</ul>
</li>
<li class="toc_item">
<a href="#mod_soul_oscillators_quadrature">quadrature</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_oscillators_quadrature_Processor">Processor</a>
</li>
</ul>
</li>
<li class="toc_item">
<a href="#mod_soul_oscillators_lfo">lfo</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_oscillators_lfo_shapers">shapers</a>
</li>
<li class="toc_item">
<a href="#mod_soul_oscillators_lfo_Shape">Shape</a>
</li>
<li class="toc_item">
<a href="#mod_soul_oscillators_lfo_Polarity">Polarity</a>
</li>
<li class="toc_item">
<a href="#mod_soul_oscillators_lfo_Processor">Processor</a>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li class="toc_module">
<a href="#lib_soul_library_filters">Filters</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_filters">soul::filters</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_filters_dc_blocker">dc_blocker</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_filters_dc_blocker_Processor">Processor</a>
</li>
</ul>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_biquad">biquad</a>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_onepole">onepole</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_filters_onepole_Mode">Mode</a>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_onepole_Processor">Processor</a>
</li>
</ul>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_rbj_eq">rbj_eq</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_filters_rbj_eq_Mode">Mode</a>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_rbj_eq_Processor">Processor</a>
</li>
</ul>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_sos_cascade">sos_cascade</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_filters_sos_cascade_Processor">Processor</a>
</li>
</ul>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_butterworth">butterworth</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_filters_butterworth_Mode">Mode</a>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_butterworth_Processor">Processor</a>
</li>
</ul>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_analytic">analytic</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_filters_analytic_polyphase_iir_design">polyphase_iir_design</a>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_analytic_dual_apf">dual_apf</a>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_analytic_Processor">Processor</a>
</li>
</ul>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_complex_resonator">complex_resonator</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_filters_complex_resonator_Processor">Processor</a>
</li>
</ul>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_tpt">tpt</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_filters_tpt_onepole">onepole</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_filters_tpt_onepole_Mode">Mode</a>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_tpt_onepole_Processor">Processor</a>
</li>
</ul>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_tpt_svf">svf</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_filters_tpt_svf_Mode">Mode</a>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_tpt_svf_Processor">Processor</a>
</li>
</ul>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_tpt_butterworth">butterworth</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_filters_tpt_butterworth_Mode">Mode</a>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_tpt_butterworth_Processor">Processor</a>
</li>
</ul>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_tpt_crossover">crossover</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_filters_tpt_crossover_Processor">Processor</a>
</li>
</ul>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_tpt_simper_eq">simper_eq</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_filters_tpt_simper_eq_Mode">Mode</a>
</li>
<li class="toc_item">
<a href="#mod_soul_filters_tpt_simper_eq_Processor">Processor</a>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li class="toc_module">
<a href="#lib_soul_library_midi">MIDI utilities</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_midi">soul::midi</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_midi_MPEParser">MPEParser</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="toc_module">
<a href="#lib_soul_library_frequency">Frequency-domain utilities</a>
<ul class="toc_item">
<li class="toc_item">
<a href="#mod_soul_DFT">soul::DFT</a>
</li>
</ul>
</li>
</ul>
</nav>
<section id="content">
<div class="library" id="lib_soul_library_intrinsics">
<h1>Intrinsic functions</h1>
<div class="module" id="mod_soul_intrinsics">
<h2><span class="module_type">namespace </span><span class="module_name">soul::intrinsics</span>
</h2>
<div class="summary"><p>The <code>intrinsics</code> namespace contains low-level, commonly-used functions.</p><p>This is a special-case namespace, as the functions inside it can be used without needing to specify their namespace (i.e. you can just write <code>abs(x)</code>, no need to write <code>soul::intrinsics::abs(x)</code>).</p><p>Many of these functions have reference implementations defined in this file, but which will be substituted for more optimal implementations by a JIT engine if possible. The <code>[[intrin]]</code> annotation is used as a hint to the performer back-end that this function should be replaced by a native implementation if one is available. (Note that some of the functions here have non-functional implementations and rely on the performer to use a native implementation for them to work at all).</p>
</div>
<div class="module_sections">
<div class="module_section">
<h3>Functions</h3>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_abs">abs</h3>
<div class="summary"><p>Familiar abs() function, accepting most scalar types.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"abs"</span></span> ]]</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">removeReference</span> <span class="function_name">abs<T></span> (<span class="typename_text">T</span> <span class="parameter_name">n</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_max">max</h3>
<div class="summary"><p>Returns the greater of two scalar values.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"max"</span></span> ]]</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">removeReference</span> <span class="function_name">max<T></span> (<span class="typename_text">T</span> <span class="parameter_name">a</span>,<br> <span class="typename_text">T</span> <span class="parameter_name">b</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_min">min</h3>
<div class="summary"><p>Returns the lesser of two scalar values.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"min"</span></span> ]]</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">removeReference</span> <span class="function_name">min<T></span> (<span class="typename_text">T</span> <span class="parameter_name">a</span>,<br> <span class="typename_text">T</span> <span class="parameter_name">b</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_min">min</h3>
<div class="summary"><p>Returns the lesser of two scalar values.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"min"</span></span> ]]</div><p class="code_block"><span class="primitive_type">int32</span> <span class="function_name">min</span> (<span class="primitive_type">int32</span> <span class="parameter_name">a</span>,<br> <span class="primitive_type">int32</span> <span class="parameter_name">b</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_clamp">clamp</h3>
<div class="summary"><p>Clamps a scalar value to the nearest value within a given range.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"clamp"</span></span> ]]</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">removeReference</span> <span class="function_name">clamp<T></span> (<span class="typename_text">T</span> <span class="parameter_name">n</span>,<br> <span class="typename_text">T</span> <span class="parameter_name">low</span>,<br> <span class="typename_text">T</span> <span class="parameter_name">high</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_wrap">wrap</h3>
<div class="summary"><p>Performs a negative-number-aware modulo operation to wrap a number to a zero-based range.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"wrap"</span></span> ]]</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">removeReference</span> <span class="function_name">wrap<T></span> (<span class="typename_text">T</span> <span class="parameter_name">n</span>,<br> <span class="typename_text">T</span> <span class="parameter_name">range</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_wrap">wrap</h3>
<div class="summary"><p>Performs a negative-number-aware integer modulo operation.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"wrap"</span></span> ]]</div><p class="code_block"><span class="primitive_type">int32</span> <span class="function_name">wrap</span> (<span class="primitive_type">int32</span> <span class="parameter_name">n</span>,<br> <span class="primitive_type">int32</span> <span class="parameter_name">range</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_floor">floor</h3>
<div class="summary"><p>Performs a C++-compatible floor function on a scalar floating point value.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"floor"</span></span> ]]</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">removeReference</span> <span class="function_name">floor<T></span> (<span class="typename_text">T</span> <span class="parameter_name">n</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_ceil">ceil</h3>
<div class="summary"><p>Performs a C++-compatible ceil function on a scalar floating point value.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"ceil"</span></span> ]]</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">removeReference</span> <span class="function_name">ceil<T></span> (<span class="typename_text">T</span> <span class="parameter_name">n</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_lerp">lerp</h3>
<div class="summary"><p>Returns a linearly-interpolated value between two scalar values.</p>
</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">removeReference</span> <span class="function_name">lerp<T></span> (<span class="typename_text">T</span> <span class="parameter_name">start</span>,<br> <span class="typename_text">T</span> <span class="parameter_name">stop</span>,<br> <span class="typename_text">T</span> <span class="parameter_name">amount</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_fmod">fmod</h3>
<div class="summary"><p>Performs a C++-compatible fmod function on some scalar floating point values.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"fmod"</span></span> ]]</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">removeReference</span> <span class="function_name">fmod<T></span> (<span class="typename_text">T</span> <span class="parameter_name">x</span>,<br> <span class="typename_text">T</span> <span class="parameter_name">y</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_remainder">remainder</h3>
<div class="summary"><p>Performs a C++-compatible remainder function on some scalar floating point values.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"remainder"</span></span> ]]</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">removeReference</span> <span class="function_name">remainder<T></span> (<span class="typename_text">T</span> <span class="parameter_name">x</span>,<br> <span class="typename_text">T</span> <span class="parameter_name">y</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_sqrt">sqrt</h3>
<div class="summary"><p>Returns the square root of a scalar floating point value.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"sqrt"</span></span> ]]</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">removeReference</span> <span class="function_name">sqrt<T></span> (<span class="typename_text">T</span> <span class="parameter_name">n</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_pow">pow</h3>
<div class="summary"><p>Raises a scalar floating point value to the given power.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"pow"</span></span> ]]</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">removeReference</span> <span class="function_name">pow<T></span> (<span class="typename_text">T</span> <span class="parameter_name">a</span>,<br> <span class="typename_text">T</span> <span class="parameter_name">b</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_exp">exp</h3>
<div class="summary"><p>Returns the exponential of a scalar floating point value.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"exp"</span></span> ]]</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">removeReference</span> <span class="function_name">exp<T></span> (<span class="typename_text">T</span> <span class="parameter_name">n</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_log">log</h3>
<div class="summary"><p>Returns the log-e of a scalar floating point value.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"log"</span></span> ]]</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">removeReference</span> <span class="function_name">log<T></span> (<span class="typename_text">T</span> <span class="parameter_name">n</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_log10">log10</h3>
<div class="summary"><p>Returns the log 10 of a scalar floating point value.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"log10"</span></span> ]]</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">removeReference</span> <span class="function_name">log10<T></span> (<span class="typename_text">T</span> <span class="parameter_name">n</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_roundToInt">roundToInt</h3>
<div class="summary"><p>Rounds a floating point number up or down to the nearest integer.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"roundToInt"</span></span> ]]</div><p class="code_block"><span class="primitive_type">int32</span> <span class="function_name">roundToInt</span> (<span class="primitive_type">float32</span> <span class="parameter_name">n</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_roundToInt">roundToInt</h3>
<div class="summary"><p>Rounds a floating point number up or down to the nearest integer.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"roundToInt"</span></span> ]]</div><p class="code_block"><span class="primitive_type">int64</span> <span class="function_name">roundToInt</span> (<span class="primitive_type">float64</span> <span class="parameter_name">n</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_isnan">isnan</h3>
<div class="summary"><p>Returns true if the floating point argument is a NaN.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"isnan"</span></span> ]]</div><p class="code_block"><span class="primitive_type">bool</span> <span class="function_name">isnan<T></span> (<span class="typename_text">T</span> <span class="parameter_name">n</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_isinf">isinf</h3>
<div class="summary"><p>Returns true if the floating point argument is an INF.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"isinf"</span></span> ]]</div><p class="code_block"><span class="primitive_type">bool</span> <span class="function_name">isinf<T></span> (<span class="typename_text">T</span> <span class="parameter_name">n</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_addModulo2Pi">addModulo2Pi</h3>
<div class="summary"><p>Adds a delta to a value, and returns the resulting value modulo PI/2. A typical use-case for this is in incrementing the phase of an oscillator.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"addModulo2Pi"</span></span> ]]</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">removeReference</span> <span class="function_name">addModulo2Pi<T></span> (<span class="typename_text">T</span> <span class="parameter_name">value</span>,<br> <span class="typename_text">T</span> <span class="parameter_name">increment</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_sum">sum</h3>
<div class="summary"><p>Returns the sum of an array or vector of scalar values.</p>
</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">elementType</span> <span class="function_name">sum<T></span> (<span class="typename_text">T</span> <span class="parameter_name">t</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_product">product</h3>
<div class="summary"><p>Returns the product of an array or vector of scalar values.</p>
</div><p class="code_block"><span class="typename_text">T</span><span class="typename_text">.</span><span class="typename_text">elementType</span> <span class="function_name">product<T></span> (<span class="typename_text">T</span> <span class="parameter_name">t</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_read">read</h3>
<div class="summary"><p>Reads an element from an array, allowing the index to be any type of floating point type. If a floating point index is used, it will be rounded down to an integer index - for an interpolated read operation, see readLinearInterpolated(). Indexes beyond the range of the array will be wrapped.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"read"</span></span> ]]</div><p class="code_block"><span class="typename_text">Array</span><span class="typename_text">.</span><span class="typename_text">elementType</span> <span class="function_name">read<Array, IndexType></span> (<span class="keyword">const </span><span class="typename_text">Array</span><span class="typename_text">&</span> <span class="parameter_name">array</span>,<br> <span class="typename_text">IndexType</span> <span class="parameter_name">index</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_readLinearInterpolated">readLinearInterpolated</h3>
<div class="summary"><p>Reads a linearly-interpolated value from an array of some kind of scalar values (probably a float or float-vector type). Indexes beyond the range of the array will be wrapped.</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"readLinearInterpolated"</span></span> ]]</div><p class="code_block"><span class="typename_text">Array</span><span class="typename_text">.</span><span class="typename_text">elementType</span> <span class="function_name">readLinearInterpolated<Array, IndexType></span> (<span class="keyword">const </span><span class="typename_text">Array</span><span class="typename_text">&</span> <span class="parameter_name">array</span>,<br> <span class="typename_text">IndexType</span> <span class="parameter_name">index</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_intrinsics_get_array_size">get_array_size</h3>
<div class="summary"><p>NB: this is used internally, not something you'd want to call from user code</p>
</div>
<div class="annotation">[[ <span class="annotation_name">intrin</span>: <span class="annotation_value"><span class="typename_text">"get_array_size"</span></span> ]]</div><p class="code_block"><span class="primitive_type">int32</span> <span class="function_name">get_array_size<Array></span> (<span class="keyword">const </span><span class="typename_text">Array</span><span class="typename_text">&</span> <span class="parameter_name">array</span>)</p>
</div>
</div>
</div>
</div>
</div><div class="library" id="lib_soul_library_audio_utils">
<h1>Miscellaneous audio utilities</h1>
<div class="summary"><p>This module is a collection of commonly-used audio helper functions and types.</p>
</div>
<div class="module" id="mod_soul">
<h2><span class="module_type">namespace </span><span class="module_name">soul</span>
</h2>
<div class="module_sections">
<div class="module_section">
<h3>Functions</h3>
<div class="function">
<h3 class="function_name" id="fn_soul_dBtoGain">dBtoGain</h3>
<div class="summary"><p>Converts a decibel level to a gain factor.</p>
</div><p class="code_block"><span class="primitive_type">float32</span> <span class="function_name">dBtoGain</span> (<span class="primitive_type">float32</span> <span class="parameter_name">decibels</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_dBtoGain">dBtoGain</h3>
<div class="summary"><p>Converts a decibel level to a gain factor.</p>
</div><p class="code_block"><span class="primitive_type">float64</span> <span class="function_name">dBtoGain</span> (<span class="primitive_type">float64</span> <span class="parameter_name">decibels</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_gainTodB">gainTodB</h3>
<div class="summary"><p>Converts a gain factor to a decibel level.</p>
</div><p class="code_block"><span class="primitive_type">float32</span> <span class="function_name">gainTodB</span> (<span class="primitive_type">float32</span> <span class="parameter_name">gain</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_gainTodB">gainTodB</h3>
<div class="summary"><p>Converts a gain factor to a decibel level.</p>
</div><p class="code_block"><span class="primitive_type">float64</span> <span class="function_name">gainTodB</span> (<span class="primitive_type">float64</span> <span class="parameter_name">gain</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_noteNumberToFrequency">noteNumberToFrequency</h3>
<div class="summary"><p>Converts a MIDI note (usually in the range 0-127) to a frequency in Hz.</p>
</div><p class="code_block"><span class="primitive_type">float32</span> <span class="function_name">noteNumberToFrequency</span> (<span class="primitive_type">int32</span> <span class="parameter_name">note</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_noteNumberToFrequency">noteNumberToFrequency</h3>
<div class="summary"><p>Converts a MIDI note (usually in the range 0-127) to a frequency in Hz.</p>
</div><p class="code_block"><span class="primitive_type">float32</span> <span class="function_name">noteNumberToFrequency</span> (<span class="primitive_type">float32</span> <span class="parameter_name">note</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_frequencyToNoteNumber">frequencyToNoteNumber</h3>
<div class="summary"><p>Converts a frequency in Hz to an equivalent MIDI note number.</p>
</div><p class="code_block"><span class="primitive_type">float32</span> <span class="function_name">frequencyToNoteNumber</span> (<span class="primitive_type">float32</span> <span class="parameter_name">frequency</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_getSpeedRatioForPitchedSample">getSpeedRatioForPitchedSample</h3>
<div class="summary"><p>Returns the ratio by which a sample's playback must be sped-up in order to map from its native sample-rate and note to a target sample-rate and note.</p>
</div><p class="code_block"><span class="primitive_type">float64</span> <span class="function_name">getSpeedRatioForPitchedSample</span> (<span class="primitive_type">float64</span> <span class="parameter_name">sourceSampleRate</span>,<br> <span class="primitive_type">float32</span> <span class="parameter_name">sourceMIDINote</span>,<br> <span class="primitive_type">float64</span> <span class="parameter_name">targetSampleRate</span>,<br> <span class="primitive_type">float32</span> <span class="parameter_name">targetMIDINote</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_tau2pole">tau2pole</h3>
<div class="summary"><p>Returns the coefficient for a filter pole, based on a t60 decay time in seconds.</p>
</div><p class="code_block"><span class="primitive_type">float64</span> <span class="function_name">tau2pole</span> (<span class="primitive_type">float64</span> <span class="parameter_name">t60</span>,<br> <span class="primitive_type">float64</span> <span class="parameter_name">sampleRate</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_tau2pole">tau2pole</h3>
<div class="summary"><p>Returns the coefficient for a filter pole, based on a t60 decay time in seconds.</p>
</div><p class="code_block"><span class="primitive_type">float32</span> <span class="function_name">tau2pole</span> (<span class="primitive_type">float32</span> <span class="parameter_name">t60</span>,<br> <span class="primitive_type">float32</span> <span class="parameter_name">sampleRate</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_pole2tau">pole2tau</h3>
<div class="summary"><p>Returns the t60 decay time in seconds for a filter pole coefficient in the range 0 to 1.</p>
</div><p class="code_block"><span class="primitive_type">float64</span> <span class="function_name">pole2tau</span> (<span class="primitive_type">float64</span> <span class="parameter_name">pole</span>,<br> <span class="primitive_type">float64</span> <span class="parameter_name">sampleRate</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_pole2tau">pole2tau</h3>
<div class="summary"><p>Returns the t60 decay time in seconds for a filter pole coefficient in the range 0 to 1.</p>
</div><p class="code_block"><span class="primitive_type">float32</span> <span class="function_name">pole2tau</span> (<span class="primitive_type">float32</span> <span class="parameter_name">pole</span>,<br> <span class="primitive_type">float32</span> <span class="parameter_name">sampleRate</span>)</p>
</div>
</div>
</div>
</div>
<div class="module" id="mod_soul_audio_samples">
<h2><span class="module_type">namespace </span><span class="module_name">soul::audio_samples</span>
</h2>
<div class="summary"><p>This namespace contains some handy stuctures to use when declaring <code>external</code> variables which are going to be loaded with data from audio files.</p>
</div>
<div class="module_sections">
<div class="module_section">
<h3>Structures</h3>
<div class="struct" id="type_soul_audio_samples_Mono">
<div class="summary"><p>An <code>external</code> variable declared with the type <code>soul::audio_samples::Mono</code> can be loaded with monoised data from an audio file.</p>
</div>
<div class="listing"><p><span class="keyword">struct </span><span class="struct_name">Mono</span><br>{<br></p>
<div class="struct_member">
<div class="listing"><span class="primitive_type">float32</span><span class="typename_text">[</span><span class="typename_text">]</span> <span class="member_name">frames</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">float64</span> <span class="member_name">sampleRate</span>;<br></div>
</div><p class="code_block">}</p>
</div>
</div>
<div class="struct" id="type_soul_audio_samples_Stereo">
<div class="summary"><p>An <code>external</code> variable declared with the type <code>soul::audio_samples::Stereo</code> can be loaded with stereo data from an audio file.</p>
</div>
<div class="listing"><p><span class="keyword">struct </span><span class="struct_name">Stereo</span><br>{<br></p>
<div class="struct_member">
<div class="listing"><span class="primitive_type">float32</span><span class="typename_text"><</span><span class="typename_text">2</span><span class="typename_text">></span><span class="typename_text">[</span><span class="typename_text">]</span> <span class="member_name">frames</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">float64</span> <span class="member_name">sampleRate</span>;<br></div>
</div><p class="code_block">}</p>
</div>
</div>
</div>
</div>
</div>
<div class="module" id="mod_soul_pan_law">
<h2><span class="module_type">namespace </span><span class="module_name">soul::pan_law</span>
</h2>
<div class="summary"><p>This namespace contains various pan-related helper functions</p>
</div>
<div class="module_sections">
<div class="module_section">
<h3>Functions</h3>
<div class="function">
<h3 class="function_name" id="fn_soul_pan_law_linear">linear</h3>
<div class="summary"><p>Applies a simple linear pan law to convert a pan position (-1.0 to 1.0) to a (left, right) pair of stereo gains.</p>
</div><p class="code_block"><span class="primitive_type">float32</span><span class="typename_text"><</span><span class="typename_text">2</span><span class="typename_text">></span> <span class="function_name">linear</span> (<span class="primitive_type">float32</span> <span class="parameter_name">pan</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_pan_law_centre3dB">centre3dB</h3>
<div class="summary"><p>Applies a 3dB-centre pan law to convert a pan position (-1.0 to 1.0) to a (left, right) pair of stereo gains.</p>
</div><p class="code_block"><span class="primitive_type">float32</span><span class="typename_text"><</span><span class="typename_text">2</span><span class="typename_text">></span> <span class="function_name">centre3dB</span> (<span class="primitive_type">float32</span> <span class="parameter_name">pan</span>)</p>
</div>
</div>
</div>
</div>
<div class="module" id="mod_soul_smoother">
<h2><span class="module_type">namespace </span><span class="module_name">soul::smoother</span>
</h2>
<div class="summary"><p>Functions for applying a smoothing filter on a changing value. A smoother is useful for avoiding discontinuities in control values such as parameter changes, etc.</p>
</div>
<div class="module_sections">
<div class="module_section">
<h3>Structures</h3>
<div class="struct" id="type_soul_smoother_State">
<div class="listing"><p><span class="keyword">struct </span><span class="struct_name">State</span><br>{<br></p>
<div class="struct_member">
<div class="listing"><span class="primitive_type">float32</span> <span class="member_name">currentValue</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">float32</span> <span class="member_name">targetValue</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">float32</span> <span class="member_name">increment</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">int32</span> <span class="member_name">steps</span>;<br></div>
</div><p class="code_block">}</p>
</div>
</div>
</div>
<div class="module_section">
<h3>Functions</h3>
<div class="function">
<h3 class="function_name" id="fn_soul_smoother_reset">reset</h3>
<div class="summary"><p>Resets a smoother::State object</p>
</div><p class="code_block"><span class="primitive_type">void</span> <span class="function_name">reset</span> (<a href="#type_soul_smoother_State" class="struct_name">State</a><span class="typename_text">&</span> <span class="parameter_name">state</span>,<br> <span class="primitive_type">float32</span> <span class="parameter_name">initialValue</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_smoother_setTarget">setTarget</h3>
<div class="summary"><p>Updates a smoother::State object with a new target value and the number of steps to reach the target</p>
</div><p class="code_block"><span class="primitive_type">void</span> <span class="function_name">setTarget</span> (<a href="#type_soul_smoother_State" class="struct_name">State</a><span class="typename_text">&</span> <span class="parameter_name">state</span>,<br> <span class="primitive_type">float32</span> <span class="parameter_name">targetValue</span>,<br> <span class="primitive_type">int32</span> <span class="parameter_name">steps</span>)</p>
</div>
<div class="function">
<h3 class="function_name" id="fn_soul_smoother_tick">tick</h3>
<div class="summary"><p>Advances the state of a smoother and returns the new smoothed value</p>
</div><p class="code_block"><span class="primitive_type">float32</span> <span class="function_name">tick</span> (<a href="#type_soul_smoother_State" class="struct_name">State</a><span class="typename_text">&</span> <span class="parameter_name">state</span>)</p>
</div>
</div>
</div>
</div>
</div><div class="library" id="lib_soul_library_notes">
<h1>Musical note utilities</h1>
<div class="summary"><p>This module contains various structs which can be used to model note-control events coming from sources such as MIDI keyboards.</p><p>The SOUL policy is to keep the use of actual MIDI to a minimum, so we encourage incoming MIDI data to be converted into these strongly-typed structures, and to use them internally, rather than attempting to work with MIDI bytes like it's the 1980s.</p>
</div>
<div class="module" id="mod_soul_note_events">
<h2><span class="module_type">namespace </span><span class="module_name">soul::note_events</span>
</h2>
<div class="summary"><p>This namespace contains some types which are handy for representing synthesiser note events. They do a similar job to MIDI events, but as strongly-typed structs instead of a group of bytes. Things like the midi::MPEParser class generate them.</p><p>The events do contain a channel number, in the same way that MIDI does, but there are no restrictions on its range.</p>
</div>
<div class="module_sections">
<div class="module_section">
<h3>Structures</h3>
<div class="struct" id="type_soul_note_events_NoteOn">
<div class="summary"><p>Represents a note-on (key-down) event.</p>
</div>
<div class="listing"><p><span class="keyword">struct </span><span class="struct_name">NoteOn</span><br>{<br></p>
<div class="struct_member">
<div class="listing"><span class="primitive_type">int32</span> <span class="member_name">channel</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">float32</span> <span class="member_name">note</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">float32</span> <span class="member_name">velocity</span>;<br></div>
</div><p class="code_block">}</p>
</div>
</div>
<div class="struct" id="type_soul_note_events_NoteOff">
<div class="summary"><p>Represents a note-off (key-up) event.</p>
</div>
<div class="listing"><p><span class="keyword">struct </span><span class="struct_name">NoteOff</span><br>{<br></p>
<div class="struct_member">
<div class="listing"><span class="primitive_type">int32</span> <span class="member_name">channel</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">float32</span> <span class="member_name">note</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">float32</span> <span class="member_name">velocity</span>;<br></div>
</div><p class="code_block">}</p>
</div>
</div>
<div class="struct" id="type_soul_note_events_PitchBend">
<div class="summary"><p>Represents a change to the pitch that should be applied to any notes being played on the channel specified.</p>
</div>
<div class="listing"><p><span class="keyword">struct </span><span class="struct_name">PitchBend</span><br>{<br></p>
<div class="struct_member">
<div class="listing"><span class="primitive_type">int32</span> <span class="member_name">channel</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">float32</span> <span class="member_name">bendSemitones</span>;<br></div>
</div><p class="code_block">}</p>
</div>
</div>
<div class="struct" id="type_soul_note_events_Pressure">
<div class="summary"><p>Represents a change to the pressure that should be applied to any notes being played on the channel specified.</p>
</div>
<div class="listing"><p><span class="keyword">struct </span><span class="struct_name">Pressure</span><br>{<br></p>
<div class="struct_member">
<div class="listing"><span class="primitive_type">int32</span> <span class="member_name">channel</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">float32</span> <span class="member_name">pressure</span>;<br></div>
</div><p class="code_block">}</p>
</div>
</div>
<div class="struct" id="type_soul_note_events_Slide">
<div class="summary"><p>Represents a change to the Y-axis parameter that should be applied to any notes being played on the channel specified.</p>
</div>
<div class="listing"><p><span class="keyword">struct </span><span class="struct_name">Slide</span><br>{<br></p>
<div class="struct_member">
<div class="listing"><span class="primitive_type">int32</span> <span class="member_name">channel</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">float32</span> <span class="member_name">slide</span>;<br></div>
</div><p class="code_block">}</p>
</div>
</div>
<div class="struct" id="type_soul_note_events_Control">
<div class="summary"><p>Represents a change to a user-defined control parameter that should be applied to any notes being played on the channel specified.</p>
</div>
<div class="listing"><p><span class="keyword">struct </span><span class="struct_name">Control</span><br>{<br></p>
<div class="struct_member">
<div class="listing"><span class="primitive_type">int32</span> <span class="member_name">channel</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">int32</span> <span class="member_name">control</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">float32</span> <span class="member_name">value</span>;<br></div>
</div><p class="code_block">}</p>
</div>
</div>
</div>
</div>
</div>
<div class="module" id="mod_soul_voice_allocators">
<h2><span class="module_type">namespace </span><span class="module_name">soul::voice_allocators</span>
</h2>
<div class="summary"><p>Simple voice allocation helpers, which take a single stream of input events, and redirect them to an array of target voice processors.</p>
</div>
<div class="module_sections">
<div class="module_section">
<h3>Specialisation Parameters</h3><p class="code_block"><span class="module_type">namespace</span> <span class="module_name">soul::voice_allocators</span> (<span class="primitive_type">int32</span> <span class="variable_name">mpeMasterChannel</span> = 0)</p>
</div>
</div>
</div>
<div class="module" id="mod_soul_voice_allocators_Basic">
<h2><span class="module_type">processor </span><span class="module_name">soul::voice_allocators::Basic</span>
</h2>
<div class="summary"><p>A simple voice-allocator which will find either an inactive voice, or the least-recently used active voice if it needs to steal one.</p>
</div>
<div class="module_sections">
<div class="annotation">[[ <span class="annotation_name">main</span>: <span class="annotation_value"><span class="typename_text">false</span></span> ]]</div>
<div class="module_section">
<h3>Specialisation Parameters</h3><p class="code_block"><span class="module_type">processor</span> <span class="module_name">soul::voice_allocators::Basic</span> (<span class="primitive_type">int32</span> <span class="variable_name">voiceCount</span>)</p>
</div>
<div class="module_section">
<h3>Inputs</h3>
<ul>
<li class="endpoint_desc" id="endpoint_soul_voice_allocators_Basic_eventIn"><span class="endpoint_type">event</span> <span class="endpoint_name">eventIn</span> (<a href="#type_soul_note_events_NoteOn" class="struct_name">soul::note_events::NoteOn</a>, <a href="#type_soul_note_events_NoteOff" class="struct_name">soul::note_events::NoteOff</a>, <a href="#type_soul_note_events_PitchBend" class="struct_name">soul::note_events::PitchBend</a>, <a href="#type_soul_note_events_Pressure" class="struct_name">soul::note_events::Pressure</a>, <a href="#type_soul_note_events_Slide" class="struct_name">soul::note_events::Slide</a>, <a href="#type_soul_note_events_Control" class="struct_name">soul::note_events::Control</a>)</li>
</ul>
</div>
<div class="module_section">
<h3>Outputs</h3>
<ul>
<li class="endpoint_desc" id="endpoint_soul_voice_allocators_Basic_voiceEventOut"><span class="endpoint_type">event</span> <span class="endpoint_name">voiceEventOut</span> (<a href="#type_soul_note_events_NoteOn" class="struct_name">soul::note_events::NoteOn</a>, <a href="#type_soul_note_events_NoteOff" class="struct_name">soul::note_events::NoteOff</a>, <a href="#type_soul_note_events_PitchBend" class="struct_name">soul::note_events::PitchBend</a>, <a href="#type_soul_note_events_Pressure" class="struct_name">soul::note_events::Pressure</a>, <a href="#type_soul_note_events_Slide" class="struct_name">soul::note_events::Slide</a>, <a href="#type_soul_note_events_Control" class="struct_name">soul::note_events::Control</a>)</li>
</ul>
</div>
<div class="module_section">
<h3>Structures</h3>
<div class="struct" id="type_soul_voice_allocators_Basic_VoiceInfo">
<div class="listing"><p><span class="keyword">struct </span><span class="struct_name">VoiceInfo</span><br>{<br></p>
<div class="struct_member">
<div class="listing"><span class="primitive_type">bool</span> <span class="member_name">active</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">int32</span> <span class="member_name">channel</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">float32</span> <span class="member_name">note</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">int32</span> <span class="member_name">voiceAge</span>;<br></div>
</div>
<div class="struct_member">
<div class="listing"><span class="primitive_type">bool</span> <span class="member_name">noteReleased</span>;<br></div>
</div><p class="code_block">}</p>
</div>
</div>
</div>
<div class="module_section">
<h3>Variables</h3>
<div class="variable"><p class="code_block"><span class="primitive_type">int32</span> <span class="variable_name">nextAllocatedVoiceAge</span> = 1000000000</p>
</div>
<div class="variable"><p class="code_block"><span class="primitive_type">int32</span> <span class="variable_name">nextUnallocatedVoiceAge</span> = 1</p>
</div>
<div class="variable"><p class="code_block"><span class="primitive_type">int32</span> <span class="variable_name">sustainCC</span> = 64</p>
</div>
<div class="variable"><p class="code_block">
<a href="#type_soul_voice_allocators_Basic_VoiceInfo" class="struct_name">VoiceInfo</a><span class="typename_text">[</span>
<a href="#var_soul_voice_allocators_Basic_voiceCount" class="struct_name">voiceCount</a><span class="typename_text">]</span> <span class="variable_name">voiceInfo</span></p>
</div>
<div class="variable"><p class="code_block"><span class="primitive_type">bool</span><span class="typename_text">[</span><span class="typename_text">16</span><span class="typename_text">]</span> <span class="variable_name">channelSustainActive</span></p>
</div>
<div class="variable"><p class="code_block"><span class="primitive_type">bool</span> <span class="variable_name">masterSustainActive</span></p>
</div>
</div>
</div>
</div>
</div><div class="library" id="lib_soul_library_mixing">
<h1>Mix and gain control utilities</h1>
<div class="summary"><p>This file provides a set of processors for common tasks like mixing together sources, applying fixed gains, or applying envelope shapes.</p>
</div>
<div class="module" id="mod_soul_mixers">
<h2><span class="module_type">namespace </span><span class="module_name">soul::mixers</span>
</h2>
<div class="summary"><p>This namespace contains a set of processors for common tasks like mixing together sources.</p>
</div>
<div class="module_sections"></div>
</div>
<div class="module" id="mod_soul_mixers_FixedSum">
<h2><span class="module_type">processor </span><span class="module_name">soul::mixers::FixedSum</span>
</h2>
<div class="summary"><p>Simple processor which adds two sources together using fixed gains for each source.</p>
</div>
<div class="module_sections">
<div class="module_section">
<h3>Specialisation Parameters</h3><p class="code_block"><span class="module_type">processor</span> <span class="module_name">soul::mixers::FixedSum</span> (<span class="keyword">using</span> <span class="variable_name" id="type_soul_mixers_FixedSum_SampleType">SampleType</span>,<br> <span class="primitive_type">float32</span> <span class="variable_name">gain1</span>,<br> <span class="primitive_type">float32</span> <span class="variable_name">gain2</span>)</p>
</div>
<div class="module_section">
<h3>Inputs</h3>
<ul>
<li class="endpoint_desc" id="endpoint_soul_mixers_FixedSum_in1"><span class="endpoint_type">stream</span> <span class="endpoint_name">in1</span> (<a href="#type_soul_mixers_FixedSum_SampleType" class="struct_name">SampleType</a>)</li>
<li class="endpoint_desc" id="endpoint_soul_mixers_FixedSum_in2"><span class="endpoint_type">stream</span> <span class="endpoint_name">in2</span> (<a href="#type_soul_mixers_FixedSum_SampleType" class="struct_name">SampleType</a>)</li>
</ul>
</div>
<div class="module_section">
<h3>Outputs</h3>
<ul>
<li class="endpoint_desc" id="endpoint_soul_mixers_FixedSum_out"><span class="endpoint_type">stream</span> <span class="endpoint_name">out</span> (<a href="#type_soul_mixers_FixedSum_SampleType" class="struct_name">SampleType</a>)</li>
</ul>
</div>
</div>
</div>
<div class="module" id="mod_soul_mixers_DynamicSum">
<h2><span class="module_type">processor </span><span class="module_name">soul::mixers::DynamicSum</span>
</h2>
<div class="summary"><p>Simple processor which adds two sources together using streams to control the gains to apply to each source.</p>
</div>
<div class="module_sections">
<div class="module_section">
<h3>Specialisation Parameters</h3><p class="code_block"><span class="module_type">processor</span> <span class="module_name">soul::mixers::DynamicSum</span> (<span class="keyword">using</span> <span class="variable_name" id="type_soul_mixers_DynamicSum_SampleType">SampleType</span>)</p>
</div>
<div class="module_section">
<h3>Inputs</h3>
<ul>
<li class="endpoint_desc" id="endpoint_soul_mixers_DynamicSum_in1"><span class="endpoint_type">stream</span> <span class="endpoint_name">in1</span> (<a href="#type_soul_mixers_DynamicSum_SampleType" class="struct_name">SampleType</a>)</li>
<li class="endpoint_desc" id="endpoint_soul_mixers_DynamicSum_in2"><span class="endpoint_type">stream</span> <span class="endpoint_name">in2</span> (<a href="#type_soul_mixers_DynamicSum_SampleType" class="struct_name">SampleType</a>)</li>
<li class="endpoint_desc" id="endpoint_soul_mixers_DynamicSum_gain1"><span class="endpoint_type">stream</span> <span class="endpoint_name">gain1</span> (<span class="primitive_type">float32</span>)</li>
<li class="endpoint_desc" id="endpoint_soul_mixers_DynamicSum_gain2"><span class="endpoint_type">stream</span> <span class="endpoint_name">gain2</span> (<span class="primitive_type">float32</span>)</li>
</ul>
</div>
<div class="module_section">
<h3>Outputs</h3>
<ul>
<li class="endpoint_desc" id="endpoint_soul_mixers_DynamicSum_out"><span class="endpoint_type">stream</span> <span class="endpoint_name">out</span> (<a href="#type_soul_mixers_DynamicSum_SampleType" class="struct_name">SampleType</a>)</li>
</ul>
</div>
</div>
</div>
<div class="module" id="mod_soul_mixers_DynamicMix">
<h2><span class="module_type">processor </span><span class="module_name">soul::mixers::DynamicMix</span>
</h2>
<div class="summary"><p>Simple processor which mixes together two sources, using a stream of values to indicate the ratio.</p><p>The mixRange constant allows you to set the range of values that will be passed in the mix stream, so e.g. mixRange = 1.0 means that mix will be in the range 0 to 1, and mixRange = 100 means the values will be 0 to 100. The mix stream is expected to contain values between 0 and mixRange, where mix = 0 produces 100% in1, and mix = mixRange produces 100% in2.</p>
</div>
<div class="module_sections">
<div class="module_section">
<h3>Specialisation Parameters</h3><p class="code_block"><span class="module_type">processor</span> <span class="module_name">soul::mixers::DynamicMix</span> (<span class="keyword">using</span> <span class="variable_name" id="type_soul_mixers_DynamicMix_SampleType">SampleType</span>,<br> <span class="primitive_type">float32</span> <span class="variable_name">mixRange</span>)</p>
</div>
<div class="module_section">
<h3>Inputs</h3>
<ul>
<li class="endpoint_desc" id="endpoint_soul_mixers_DynamicMix_in1"><span class="endpoint_type">stream</span> <span class="endpoint_name">in1</span> (<a href="#type_soul_mixers_DynamicMix_SampleType" class="struct_name">SampleType</a>)</li>
<li class="endpoint_desc" id="endpoint_soul_mixers_DynamicMix_in2"><span class="endpoint_type">stream</span> <span class="endpoint_name">in2</span> (<a href="#type_soul_mixers_DynamicMix_SampleType" class="struct_name">SampleType</a>)</li>
<li class="endpoint_desc" id="endpoint_soul_mixers_DynamicMix_mix"><span class="endpoint_type">stream</span> <span class="endpoint_name">mix</span> (<span class="primitive_type">float32</span>)</li>
</ul>
</div>
<div class="module_section">
<h3>Outputs</h3>
<ul>
<li class="endpoint_desc" id="endpoint_soul_mixers_DynamicMix_out"><span class="endpoint_type">stream</span> <span class="endpoint_name">out</span> (<a href="#type_soul_mixers_DynamicMix_SampleType" class="struct_name">SampleType</a>)</li>
</ul>
</div>
</div>
</div>
<div class="module" id="mod_soul_gain">
<h2><span class="module_type">namespace </span><span class="module_name">soul::gain</span>
</h2>
<div class="summary"><p>Utility processors for common tasks like applying gain in various ways.</p>
</div>
<div class="module_sections"></div>
</div>
<div class="module" id="mod_soul_gain_FixedGain">
<h2><span class="module_type">processor </span><span class="module_name">soul::gain::FixedGain</span>
</h2>
<div class="summary"><p>Simple processor which applies a fixed gain to a signal.</p>
</div>
<div class="module_sections">
<div class="module_section">
<h3>Specialisation Parameters</h3><p class="code_block"><span class="module_type">processor</span> <span class="module_name">soul::gain::FixedGain</span> (<span class="keyword">using</span> <span class="variable_name" id="type_soul_gain_FixedGain_SampleType">SampleType</span>,<br> <span class="primitive_type">float32</span> <span class="variable_name">fixedGain</span>)</p>
</div>
<div class="module_section">
<h3>Inputs</h3>
<ul>
<li class="endpoint_desc" id="endpoint_soul_gain_FixedGain_in"><span class="endpoint_type">stream</span> <span class="endpoint_name">in</span> (<a href="#type_soul_gain_FixedGain_SampleType" class="struct_name">SampleType</a>)</li>
</ul>
</div>
<div class="module_section">
<h3>Outputs</h3>
<ul>
<li class="endpoint_desc" id="endpoint_soul_gain_FixedGain_out"><span class="endpoint_type">stream</span> <span class="endpoint_name">out</span> (<a href="#type_soul_gain_FixedGain_SampleType" class="struct_name">SampleType</a>)</li>
</ul>
</div>
</div>
</div>
<div class="module" id="mod_soul_gain_DynamicGain">
<h2><span class="module_type">processor </span><span class="module_name">soul::gain::DynamicGain</span>
</h2>
<div class="summary"><p>Simple processor which applies a changeable gain level to a signal.</p>
</div>
<div class="module_sections">
<div class="module_section">
<h3>Specialisation Parameters</h3><p class="code_block"><span class="module_type">processor</span> <span class="module_name">soul::gain::DynamicGain</span> (<span class="keyword">using</span> <span class="variable_name" id="type_soul_gain_DynamicGain_SampleType">SampleType</span>)</p>
</div>
<div class="module_section">
<h3>Inputs</h3>
<ul>
<li class="endpoint_desc" id="endpoint_soul_gain_DynamicGain_in"><span class="endpoint_type">stream</span> <span class="endpoint_name">in</span> (<a href="#type_soul_gain_DynamicGain_SampleType" class="struct_name">SampleType</a>)</li>
<li class="endpoint_desc" id="endpoint_soul_gain_DynamicGain_gain"><span class="endpoint_type">stream</span> <span class="endpoint_name">gain</span> (<span class="primitive_type">float32</span>)</li>
</ul>
</div>
<div class="module_section">