Updates to the assistants overall abilities, like always listening, and only responding on messages when activated.

bolt_assistant/audio.py

@@ -30,7 +30,42 @@ def open_mic(on_frame: Callable[[bytes], None]):
 
 def play(chunks: Iterable[bytes], sample_rate: int = config.TTS_SAMPLE_RATE,
          should_stop: Callable[[], bool] = lambda: False) -> bool:
-    """Play PCM16 mono chunks as they arrive. False if stopped early."""
+    """Play PCM16 mono chunks as they arrive. False if stopped early.
+
+    Through `pacat`, not sounddevice: PortAudio only sees raw ALSA devices,
+    so a Bluetooth or PipeWire sink is invisible to it and the audio goes
+    somewhere nobody can hear. pacat talks to the audio server, so it
+    follows the system's default sink like every other player.
+    """
+    import shutil
+    import subprocess
+
+    if shutil.which("pacat") is None:
+        return _play_sounddevice(chunks, sample_rate, should_stop)
+
+    proc = subprocess.Popen(
+        ["pacat", "--rate", str(sample_rate), "--channels", "1",
+         "--format", "s16le", "--latency-msec", "60"],
+        stdin=subprocess.PIPE, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL,
+    )
+    try:
+        for chunk in chunks:
+            if should_stop():
+                return False
+            proc.stdin.write(chunk)
+        proc.stdin.close()
+        proc.wait(timeout=10)
+    except (BrokenPipeError, OSError):
+        return False
+    finally:
+        if proc.poll() is None:
+            proc.kill()
+    return True
+
+
+def _play_sounddevice(chunks: Iterable[bytes], sample_rate: int,
+                      should_stop: Callable[[], bool]) -> bool:
+    """Fallback for a machine without pacat."""
     import sounddevice as sd
 
     with sd.RawOutputStream(samplerate=sample_rate, channels=1, dtype="int16",