Unable to open a Virtual Device Stream the SECOND time.

[GeoffGodwin]

Trying this library out to learn more about how audio streams work, and ran into an issue on my Win 10 machine.

I am attempting to send audio from my Electron app to two output devices: my computer speakers and my virtual audio cable. The following code appears to work for the most part:

import * as portAudio from 'naudiodon';
import * as fs from 'fs';
import * as wav from 'wav';

let wavFiles:fs.ReadStream[] = [];
let wavReader;
let headPhones, virtualCable;
let paused = false;

setupPortAudioDevices();

export function setupPortAudioDevices(){
    const fullDeviceList = portAudio.getDevices();
    const selectedDeviceList : portAudio.DeviceInfo[] = [];
   
    // Lookup the speakers and virtual cable devices.
    fullDeviceList.map((device)=>{
        if(device.name === "Speakers (VB-Audio CABLE-A)" || device.name === "Realtek Digital Output (Realtek"){
            selectedDeviceList.push(device);
        }
    });
    // Create the headphones
    headPhones = portAudio.AudioIO({
        outOptions: {
            channelCount: 1,
            sampleFormat: portAudio.SampleFormat16Bit,
            sampleRate: 48000,
            deviceId: selectedDeviceList[0].id,
            closeOnError: false}
        });
    
    // Create the virtual speakers (Crashes here on the second run)
    virtualCable = portAudio.AudioIO({
        outOptions: {
            channelCount: 1,
            sampleFormat: portAudio.SampleFormat16Bit,
            sampleRate: 48000,
            deviceId: selectedDeviceList[1].id,
            closeOnError: false}
        });
    console.log("PortAudio devices created.");
}

export function routeAudio(file: string){
    if(wavReader){
        wavReader = undefined;
    }
    wavReader = new wav.Reader();
        wavReader.on('pause',(stuff)=>{
            console.log("Wave reader paused.");
        });
        wavReader.on('close',(stuff)=>{
            console.log("---- Wave reader CLOSED.");
        });
        console.log("Wave Reader created.");
    
    const newWaveFile = fs.createReadStream(file);

    newWaveFile.on('data', (chunk)=>{
        console.log("data:",chunk);
    });
    newWaveFile.on('end', () => {
        console.log('Wave ended.');
    });
    newWaveFile.on('error', (err) => {
        console.error('Wave Error!');
        console.error(err);
    });
    newWaveFile.on('close', (err) => {
        console.error('----------- Wave Closed!');
        // Re-open the now finished port audio devices
        setupPortAudioDevices();
    });
    newWaveFile.on('pause', ()=>{
        console.log("PAUSED the wav file");
    });
    
    // Pipe the WAV file through the reader to strip off the WAV header. 
    newWaveFile.pipe(wavReader);
    
    // Pipe the stripped WAV to the two output devices 
    wavReader.pipe(headPhones);
    wavReader.pipe(virtualCable);
    // Start the devices
    headPhones.start();
    virtualCable.start();
}

Essentially when I run routeAudio(FILENAME) and pass it a WAV file it plays it out both devices to completion. However when the WAV file completes (on close) and I rerun the setupPortAudioDevices() function the headphones connect again properly but when attempting to connect the virtual cable device I get the following error:

I'm sure I'm doing something wrong here which is likely simple but I'm still rather new to this. Any assistance would be most welcome. Also, thank you for making such a cool library, it's greatly appreciated!