Audio device selection

packages/superdough/superdough.mjs

@@ -28,11 +28,13 @@ export const resetLoadedSounds = () => soundMap.set({});
 
 let audioContext;
 
+export const setDefaultAudioContext = () => {
+  audioContext = new AudioContext();
+};
+
 export const getAudioContext = () => {
   if (!audioContext) {
-    audioContext = new AudioContext();
-    const maxChannelCount = audioContext.destination.maxChannelCount;
-    audioContext.destination.channelCount = maxChannelCount;
+    setDefaultAudioContext();
   }
   return audioContext;
 };
@@ -84,15 +86,22 @@ let delays = {};
 const maxfeedback = 0.98;
 
 let channelMerger, destinationGain;
+//update the output channel configuration to match user's audio device
+export function initializeAudioOutput() {
+  const audioContext = getAudioContext();
+  const maxChannelCount = audioContext.destination.maxChannelCount;
+  audioContext.destination.channelCount = maxChannelCount;
+  channelMerger = new ChannelMergerNode(audioContext, { numberOfInputs: audioContext.destination.channelCount });
+  destinationGain = new GainNode(audioContext);
+  channelMerger.connect(destinationGain);
+  destinationGain.connect(audioContext.destination);
+}
 
 // input: AudioNode, channels: ?Array<int>
 export const connectToDestination = (input, channels = [0, 1]) => {
   const ctx = getAudioContext();
   if (channelMerger == null) {
-    channelMerger = new ChannelMergerNode(ctx, { numberOfInputs: ctx.destination.channelCount });
-    destinationGain = new GainNode(ctx);
-    channelMerger.connect(destinationGain);
-    destinationGain.connect(ctx.destination);
+    initializeAudioOutput();
   }
   //This upmix can be removed if correct channel counts are set throughout the app,
   // and then strudel could theoretically support surround sound audio files
@@ -114,6 +123,7 @@ export const panic = () => {
   }
   destinationGain.gain.linearRampToValueAtTime(0, getAudioContext().currentTime + 0.01);
   destinationGain = null;
+  channelMerger == null;
 };
 
 function getDelay(orbit, delaytime, delayfeedback, t) {

website/src/repl/Repl.jsx

@@ -8,6 +8,7 @@ import { code2hash, getDrawContext, logger, silence } from '@strudel.cycles/core
 import cx from '@src/cx.mjs';
 import { transpiler } from '@strudel.cycles/transpiler';
 import { getAudioContext, initAudioOnFirstClick, webaudioOutput } from '@strudel.cycles/webaudio';
+import { defaultAudioDeviceName, getAudioDevices, setAudioDevice } from './panel/AudioDeviceSelector';
 import { StrudelMirror, defaultSettings } from '@strudel/codemirror';
 import { createContext, useCallback, useEffect, useRef, useState } from 'react';
 import {
@@ -79,7 +80,9 @@ export function Repl({ embedded = false }) {
       },
       bgFill: false,
     });
+
     // init settings
+
     initCode().then((decoded) => {
       let msg;
       if (decoded) {
@@ -118,6 +121,20 @@ export function Repl({ embedded = false }) {
     editorRef.current?.updateSettings(editorSettings);
   }, [_settings]);
 
+  // on first load, set stored audio device if possible
+  useEffect(() => {
+    const { audioDeviceName } = _settings;
+    if (audioDeviceName !== defaultAudioDeviceName) {
+      getAudioDevices().then((devices) => {
+        const deviceID = devices.get(audioDeviceName);
+        if (deviceID == null) {
+          return;
+        }
+        setAudioDevice(deviceID);
+      });
+    }
+  }, []);
+
   //
   // UI Actions
   //

website/src/repl/panel/AudioDeviceSelector.jsx

@@ -0,0 +1,74 @@
+import React, { useState } from 'react';
+import { getAudioContext, initializeAudioOutput, setDefaultAudioContext } from '@strudel.cycles/webaudio';
+import { SelectInput } from './SelectInput';
+import { logger } from '@strudel.cycles/core';
+
+const initdevices = new Map();
+export const defaultAudioDeviceName = 'System Standard';
+
+export const getAudioDevices = async () => {
+  await navigator.mediaDevices.getUserMedia({ audio: true });
+  let mediaDevices = await navigator.mediaDevices.enumerateDevices();
+  mediaDevices = mediaDevices.filter((device) => device.kind === 'audiooutput' && device.deviceId !== 'default');
+  const devicesMap = new Map();
+  devicesMap.set(defaultAudioDeviceName, '');
+  mediaDevices.forEach((device) => {
+    devicesMap.set(device.label, device.deviceId);
+  });
+  return devicesMap;
+};
+
+export const setAudioDevice = async (id) => {
+  const audioCtx = getAudioContext();
+  if (audioCtx.sinkId === id) {
+    return;
+  }
+  const isValidID = (id ?? '').length > 0;
+  if (isValidID) {
+    try {
+      await audioCtx.setSinkId(id);
+    } catch {
+      logger('failed to set audio interface', 'warning');
+    }
+  } else {
+    // reset the audio context and dont set the sink id if it is invalid AKA System Standard selection
+    setDefaultAudioContext();
+  }
+  initializeAudioOutput();
+};
+
+// Allows the user to select an audio interface for Strudel to play through
+export function AudioDeviceSelector({ audioDeviceName, onChange, isDisabled }) {
+  const [devices, setDevices] = useState(initdevices);
+  const devicesInitialized = devices.size > 0;
+
+  const onClick = () => {
+    if (devicesInitialized) {
+      return;
+    }
+    getAudioDevices().then((devices) => {
+      setDevices(devices);
+    });
+  };
+  const onDeviceChange = (deviceName) => {
+    if (!devicesInitialized) {
+      return;
+    }
+    const deviceID = devices.get(deviceName);
+    onChange(deviceName);
+    setAudioDevice(deviceID);
+  };
+  const options = new Map();
+  Array.from(devices.keys()).forEach((deviceName) => {
+    options.set(deviceName, deviceName);
+  });
+  return (
+    <SelectInput
+      isDisabled={isDisabled}
+      options={options}
+      onClick={onClick}
+      value={audioDeviceName}
+      onChange={onDeviceChange}
+    />
+  );
+}

website/src/repl/panel/Panel.jsx

@@ -114,7 +114,7 @@ export function Panel({ context }) {
             {activeFooter === 'console' && <ConsoleTab log={log} />}
             {activeFooter === 'sounds' && <SoundsTab />}
             {activeFooter === 'reference' && <Reference />}
-            {activeFooter === 'settings' && <SettingsTab />}
+            {activeFooter === 'settings' && <SettingsTab started={context.started} />}
             {activeFooter === 'files' && <FilesTab />}
           </div>
         </div>

website/src/repl/panel/SelectInput.jsx

@@ -0,0 +1,20 @@
+import React from 'react';
+//      value: ?ID, options: Map<ID, any>, onChange: ID => null, onClick: event => void, isDisabled: boolean
+export function SelectInput({ value, options, onChange, onClick, isDisabled }) {
+  return (
+    <select
+      disabled={isDisabled}
+      onClick={onClick}
+      className="p-2 bg-background rounded-md text-foreground"
+      value={value ?? ''}
+      onChange={(e) => onChange(e.target.value)}
+    >
+      {options.size == 0 && <option value={value}>{`${value ?? 'select an option'}`}</option>}
+      {Array.from(options.keys()).map((id) => (
+        <option key={id} className="bg-background" value={id}>
+          {options.get(id)}
+        </option>
+      ))}
+    </select>
+  );
+}

website/src/repl/panel/SettingsTab.jsx

@@ -1,6 +1,7 @@
 import { defaultSettings, settingsMap, useSettings } from '../../settings.mjs';
 import { themes } from '@strudel/codemirror';
 import { ButtonGroup } from './Forms.jsx';
+import { AudioDeviceSelector } from './AudioDeviceSelector.jsx';
 
 function Checkbox({ label, value, onChange }) {
   return (
@@ -72,7 +73,7 @@ const fontFamilyOptions = {
   mode7: 'mode7',
 };
 
-export function SettingsTab() {
+export function SettingsTab({ started }) {
   const {
     theme,
     keybindings,
@@ -86,10 +87,20 @@ export function SettingsTab() {
     fontSize,
     fontFamily,
     panelPosition,
+    audioDeviceName,
   } = useSettings();
 
   return (
     <div className="text-foreground p-4 space-y-4">
+      {AudioContext.prototype.setSinkId != null && (
+        <FormItem label="Audio Output Device">
+          <AudioDeviceSelector
+            isDisabled={started}
+            audioDeviceName={audioDeviceName}
+            onChange={(audioDeviceName) => settingsMap.setKey('audioDeviceName', audioDeviceName)}
+          />
+        </FormItem>
+      )}
       <FormItem label="Theme">
         <SelectInput options={themeOptions} value={theme} onChange={(theme) => settingsMap.setKey('theme', theme)} />
       </FormItem>

website/src/settings.mjs

@@ -2,6 +2,7 @@ import { persistentMap, persistentAtom } from '@nanostores/persistent';
 import { useStore } from '@nanostores/react';
 import { register } from '@strudel.cycles/core';
 import * as tunes from './repl/tunes.mjs';
+import { defaultAudioDeviceName } from './repl/panel/AudioDeviceSelector';
 import { logger } from '@strudel.cycles/core';
 
 export const defaultSettings = {
@@ -22,6 +23,7 @@ export const defaultSettings = {
   soundsFilter: 'all',
   panelPosition: 'right',
   userPatterns: '{}',
+  audioDeviceName: defaultAudioDeviceName,
 };
 
 export const settingsMap = persistentMap('strudel-settings', defaultSettings);