Proposal : Audio output device selector +Bluetooth A2DP fix for Linux

[MauricioBarrientos]

Problem

On Linux, playback through Bluetooth devices is broken. Nuclear always plays through the system default audio output, so when a Bluetooth headset/speaker is connected, WebKitGTK keeps routing audio to the wrong sink — or drops the audio entirely. The UI shows the track as playing, but no sound comes out.

Proposed solution

I implemented a working fix locally and it has been running well. It consists of two parts:

1. Audio output device selector (Settings -> Audio Output)

• A new audioOutputStore that enumerates devices via navigator.mediaDevices.enumerateDevices(), persists the selection, and listens for devicechange events so Bluetooth devices appear/disappear in real time
• setSinkId() support wired into the <audio> element (hifi Sound component), gracefully ignored when unsupported
• A device dropdown in Settings so you can explicitly choose your Bluetooth headset/speaker

2. Bluetooth A2DP stability buffers (Linux)

• PULSE_LATENCY_MSEC increased from 60ms to 200ms
• PIPEWIRE_LATENCY increased from 1024/48000 to 4096/48000

These larger buffers give Bluetooth codecs (SBC, AAC, LDAC) enough headroom to avoid underruns and dropouts.

How it was tested

• Linux Mint, Bluetooth headset/speaker
• Playback previously produced no sound; with the fix, audio routes correctly to the Bluetooth device
• Device hotplug (connect/disconnect) updates the device list automatically

Why I am posting this

The repository auto-closes external pull requests (PR #2128 was closed by the bot). I understand the project prefers plugins for extensions, but an audio output selector is core functionality that cannot be implemented as a plugin.

I would be happy to open a PR with these changes if the maintainers are open to it. The code touches:

• packages/player/src/stores/audioOutputStore.ts (new)
• packages/player/src/views/Settings/AudioOutputSection.tsx (new)
• packages/hifi/src/Sound.tsx / types.ts (setSinkId support)
• packages/player/src/components/SoundProvider.tsx
• packages/player/src-tauri/src/main.rs (latency buffers)

Thanks for considering this!