[BUG] ffplay fails with exit code 1 on ubuntu 22.04

[SamirSaidani]

Describe the Bug

When using the local TTS backend with the kokoro-en-v0_19 model, ffplay exits with code 1 during audio playback, causing the TTS functionality to fail. The issue is resolved by forcing the use
of paplay instead. Note that this issue is specific to TTS (Text-to-Speech) and does not affect STT (Speech-to-Text).

Environment

• OS: Ubuntu 22.04
• Pi version: 0.71.1
• pi-listen version: 15.3
• Terminal: default ubuntu terminal

To Reproduce

Steps to reproduce the behavior:

1. Install the pi-listen extension.
2. Configure the local TTS backend with the kokoro-en-v0_19 model.
3. Attempt to synthesize and play audio using the speak function.
4. Observe that ffplay exits with code 1, and audio playback fails.

Expected Behavior

Audio should play successfully using ffplay with the kokoro-en-v0_19 model.

Actual Behavior

ffplay exits with code 1, and the following error is displayed:

  Error: Streaming player ffplay exited with code 1                                                                                                                                               

Diagnostic Output
-> I'm using only tts+kokoro, stt works fine, I tried to debug the extension with pi
/voice info
Voice diagnostics:

Backend: local

Audio capture:
tool: sox (rec)
local model: parakeet-v3
local endpoint: http://localhost:8080

Config:
language: en
onboarding: complete
hold threshold: 700ms
toggle shortcut: ctrl+shift+v
kitty protocol: not detected
state: idle
mic capture: FAILED — sox ran but no audio captured
sherpa-onnx: OK (in-process mode)

-> mic capture works.

Additional Context

• Node.js Version: v24.15.0
• FFmpeg Version: 4.4.2-0ubuntu0.22.04.1
• Workaround: Forcing the use of paplay resolves the issue.
• Model Used: kokoro-en-v0_19 (TTS only, not STT).
• Note: The issue is specific to TTS and does not affect STT functionality.