adds mono-mode

.gitignore

@@ -20,3 +20,4 @@ lerna-debug.log
 /certs/localhost-key.pem
 /packages/app/soundfont/public/soundfonts/
 /packages/studio/scripting/src/api.declaration.d.ts
+tsconfig.tsbuildinfo

packages/app/studio/src/ui/timeline/tracks/audio-unit/AudioUnitChannelControls.tsx

@@ -28,7 +28,7 @@ type Construct = {
 }
 
 export const AudioUnitChannelControls = ({lifecycle, service, adapter}: Construct) => {
-    const {project, audioContext} = service
+    const {project} = service
     const {captureDevices, editing, midiLearning} = project
     const {volume, panning, mute, solo} = adapter.namedParameter
     const volumeControl = (
@@ -77,20 +77,20 @@ export const AudioUnitChannelControls = ({lifecycle, service, adapter}: Construc
         attachParameterContextMenu(editing, midiLearning, adapter.tracks, panning, panningControl),
         attachParameterContextMenu(editing, midiLearning, adapter.tracks, mute, muteControl),
         attachParameterContextMenu(editing, midiLearning, adapter.tracks, solo, soloControl),
-        captureOption.ifSome(capture => {
-            if (!isInstanceOf(capture, CaptureAudio)) {return}
-            const streamLifeCycle = lifecycle.own(new Terminator())
-            capture.stream.catchupAndSubscribe(optStream => {
+        captureOption.match({
+            none: () => Terminable.Empty,
+            some: capture => {
+                if (!isInstanceOf(capture, CaptureAudio)) {return Terminable.Empty}
+                const meterLifeCycle = lifecycle.own(new Terminator())
+                const connectMeter = () => {
                     streamRunning = false
-                streamLifeCycle.terminate()
-                return optStream.ifSome(stream => {
-                    const numberOfChannels = stream.getAudioTracks().at(0)?.getSettings().channelCount ?? 2
+                    meterLifeCycle.terminate()
+                    capture.outputNode.ifSome(outputNode => {
+                        const numberOfChannels = capture.effectiveChannelCount
                         const meterWorklet = service.audioWorklets.createMeter(numberOfChannels)
-                    const streamSource = audioContext.createMediaStreamSource(stream)
-                    streamSource.connect(meterWorklet)
+                        outputNode.connect(meterWorklet)
                         streamRunning = true
-                    streamLifeCycle.ownAll(
-                        Terminable.create(() => streamSource.disconnect()),
+                        meterLifeCycle.ownAll(
                             meterWorklet.subscribe(({peak}) => {
                                 peaksInDb[0] = gainToDb(peak[0])
                                 peaksInDb[1] = gainToDb(peak[1] ?? peak[0])
@@ -98,8 +98,13 @@ export const AudioUnitChannelControls = ({lifecycle, service, adapter}: Construc
                             meterWorklet
                         )
                     })
-            })
-        }) ?? Terminable.Empty,
+                }
+                return Terminable.many(
+                    capture.stream.catchupAndSubscribe(() => connectMeter()),
+                    capture.captureBox.requestChannels.subscribe(() => connectMeter())
+                )
+            }
+        }),
         project.liveStreamReceiver.subscribeFloats(adapter.address, values => {
             if (streamRunning) {return}
             peaksInDb[0] = gainToDb(values[0])

packages/studio/core/src/capture/CaptureAudio.ts

@@ -25,7 +25,6 @@ export class CaptureAudio extends Capture<CaptureAudioBox> {
     #isMonitoring: boolean = false
     #requestChannels: Option<1 | 2> = Option.None
     #gainDb: number = 0.0
-
     #audioChain: Nullable<{
         sourceNode: MediaStreamAudioSourceNode
         gainNode: GainNode
@@ -78,9 +77,7 @@ export class CaptureAudio extends Capture<CaptureAudioBox> {
     }
     get gainDb(): number {return this.#gainDb}
     get requestChannels(): Option<1 | 2> {return this.#requestChannels}
-    set requestChannels(value: 1 | 2) {
-        this.captureBox.requestChannels.setValue(value)
-    }
+    set requestChannels(value: 1 | 2) {this.captureBox.requestChannels.setValue(value)}
     get stream(): MutableObservableOption<MediaStream> {return this.#stream}
     get streamDeviceId(): Option<string> {
         return this.streamMediaTrack.map(settings => settings.getSettings().deviceId ?? "")
@@ -90,6 +87,8 @@ export class CaptureAudio extends Capture<CaptureAudioBox> {
     get streamMediaTrack(): Option<MediaStreamTrack> {
         return this.#stream.flatMap(stream => Option.wrap(stream.getAudioTracks().at(0)))
     }
+    get outputNode(): Option<AudioNode> {return Option.wrap(this.#audioChain?.gainNode)}
+    get effectiveChannelCount(): number {return this.#audioChain?.gainNode.channelCount ?? 1}
 
     async prepareRecording(): Promise<void> {
         const {project} = this.manager
@@ -157,8 +156,8 @@ export class CaptureAudio extends Capture<CaptureAudioBox> {
             const gotDeviceId = settings?.deviceId
             console.debug(`new stream. device requested: ${deviceId ?? "default"}, got: ${gotDeviceId ?? "unknown"}. channelCount requested: ${channelCount}, got: ${settings?.channelCount}`)
             if (isUndefined(deviceId) || deviceId === gotDeviceId) {
-                this.#stream.wrap(stream)
                 this.#rebuildAudioChain(stream)
+                this.#stream.wrap(stream)
             } else {
                 stream.getAudioTracks().forEach(track => track.stop())
                 return Errors.warn(`Could not find audio device with id: '${deviceId}' (got: '${gotDeviceId}')`)
@@ -209,7 +208,8 @@ export class CaptureAudio extends Capture<CaptureAudioBox> {
 
     #disconnectMonitoring(): void {
         if (isDefined(this.#audioChain)) {
-            this.#audioChain.gainNode.disconnect()
+            const {audioContext} = this.manager.project.env
+            this.#audioChain.gainNode.disconnect(audioContext.destination)
         }
     }
 }