diff --git a/main/ESPAudio.cpp b/main/ESPAudio.cpp
index c2b3eaedc..5f1423b87 100644
--- a/main/ESPAudio.cpp
+++ b/main/ESPAudio.cpp
@@ -347,15 +347,13 @@ void Audio::alarm( bool enable, float volume, e_audio_alarm_type_t style ){  //
 		enableAmplifier( true );
 	}
 	if( !enable && _alarm_mode ){ // End of alarm
+		_alarm_mode = false;
 		vario_mode_volume = _vol_back_vario;
 		s2f_mode_volume = _vol_back_s2f;
-		_s2f_mode = _s2f_mode_back;
 		_tonemode = _tonemode_back;
-		_alarm_mode=false;
-		if( _s2f_mode )
-			writeVolume( s2f_mode_volume );
-		else
-			writeVolume( vario_mode_volume );
+		_s2f_mode = _s2f_mode_back;    // S2F mode from before the alarm
+		calcS2Fmode(true);             // may update the S2F mode
+		writeVolume( speaker_volume );
 	}
 	if( enable ) {  // tune alarm
 		// ESP_LOGI(FNAME,"Alarm sound enable volume: %f style: %d", volume, style );
@@ -461,13 +459,16 @@ void Audio::startAudio(){
 	xTaskCreatePinnedToCore(&dactask, "dactask", 2400, NULL, 16, &dactid, 0);
 }
 
-void Audio::calcS2Fmode(){
+void Audio::calcS2Fmode( bool recalc ){
 	if( _alarm_mode )
 		return;
 	bool mode = Switch::getCruiseState();
 	if( mode != _s2f_mode ){
 		ESP_LOGI(FNAME, "S2Fmode changed to %d", mode );
 		_s2f_mode = mode;             // do this first, as...
+		recalc = true;
+	}
+	if( recalc ){
 		calculateFrequency();         // this needs the new _stf_mode
 		if( _s2f_mode )
 			speaker_volume = s2f_mode_volume;
@@ -581,7 +582,7 @@ void Audio::dactask(void* arg )
 				calculateFrequency();
 
 			if( !(tick%10) ){
-				calcS2Fmode();      // if mode changed, affects volume and frequency
+				calcS2Fmode(false);     // if mode changed, affects volume and frequency
 			}
 
 			if( inDeadBand(_te) && !volume_change ){
diff --git a/main/ESPAudio.h b/main/ESPAudio.h
index b306f3f1c..51d97d2e6 100644
--- a/main/ESPAudio.h
+++ b/main/ESPAudio.h
@@ -52,7 +52,7 @@ class Audio {
 	static void dac_invert_set(dac_channel_t channel, int invert);
 	static void dactask(void* arg);
 	static void modtask(void* arg );
-    static void calcS2Fmode();
+    static void calcS2Fmode( bool recalc=false );
     static bool inDeadBand( float te );
 	static bool lookup( float f, int& div, int &step );
 	static void enableAmplifier( bool enable );  // frue ON, false OFF