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Postprod improvements: denoise, phone EQ, ad muting, ducking, voice mappings

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- Add host mic noise reduction (afftdn + anlmdn)
- Add phone EQ bandpass on caller stem
- Mute music during ads with 2s lookahead/tail
- Increase ducking release to 3s to reduce pumping
- Add Inworld voice mappings for all regular callers
- Recording toggle endpoint, stem sync fixes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
tcpsyn
2026-02-12 03:59:08 -07:00
parent 75f15ba2d2
commit 95c2d06435
6 changed files with 216 additions and 96 deletions
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13
backend/services/audio.py
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@@ -361,10 +361,6 @@ class AudioService:
# Apply fade to prevent clicks
audio = self._apply_fade(audio, device_sr)
# Stem recording: caller TTS
if self.stem_recorder:
self.stem_recorder.write_sporadic("caller", audio.copy(), device_sr)
# Create multi-channel output with audio only on target channel
multi_ch = np.zeros((len(audio), num_channels), dtype=np.float32)
multi_ch[:, channel_idx] = audio
@@ -384,6 +380,9 @@ class AudioService:
while pos < len(multi_ch) and not self._caller_stop_event.is_set():
end = min(pos + chunk_size, len(multi_ch))
stream.write(multi_ch[pos:end])
# Record each chunk as it plays so hangups cut the stem too
if self.stem_recorder:
self.stem_recorder.write_sporadic("caller", audio[pos:end].copy(), device_sr)
pos = end
if self._caller_stop_event.is_set():
@@ -752,7 +751,7 @@ class AudioService:
mono_out = (old_samples * fade_out + new_samples * fade_in) * self._music_volume
outdata[:, channel_idx] = mono_out
if self.stem_recorder:
self.stem_recorder.write("music", mono_out.copy(), device_sr)
self.stem_recorder.write_sporadic("music", mono_out.copy(), device_sr)
self._crossfade_progress = end_progress
if self._crossfade_progress >= 1.0:
@@ -763,7 +762,7 @@ class AudioService:
mono_out = new_samples * self._music_volume
outdata[:, channel_idx] = mono_out
if self.stem_recorder:
self.stem_recorder.write("music", mono_out.copy(), device_sr)
self.stem_recorder.write_sporadic("music", mono_out.copy(), device_sr)
try:
self._music_stream = sd.OutputStream(
@@ -873,7 +872,7 @@ class AudioService:
chunk = self._ad_resampled[self._ad_position:self._ad_position + frames]
outdata[:, channel_idx] = chunk
if self.stem_recorder:
self.stem_recorder.write("ads", chunk.copy(), device_sr)
self.stem_recorder.write_sporadic("ads", chunk.copy(), device_sr)
self._ad_position += frames
else:
if remaining > 0: