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Make max_speakers configurable within the json config #410

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Merged
gabrieldemarmiesse merged 4 commits into from
Apr 15, 2026
Merged

Make max_speakers configurable within the json config #410

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8448a21
Make `max_speakers` configurable within the json config
gabrieldemarmiesse Apr 14, 2026
02d8a77
IIII
gabrieldemarmiesse Apr 14, 2026
d4aec57
Fix
gabrieldemarmiesse Apr 14, 2026
0f05f6c
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gabrieldemarmiesse Apr 14, 2026
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7 changes: 5 additions & 2 deletions moshi/moshi/models/tts.py
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,7 @@
DEFAULT_DSM_TTS_REPO = 'kyutai/tts-1.6b-en_fr'
DEFAULT_DSM_TTS_VOICE_REPO = 'kyutai/tts-voices'
PUBLIC_DATA_DSM_TTS_REPO = 'kyutai/tts-0.75b-en-public'
DEFAULT_MAX_SPEAKERS = 5


@dataclass
Expand Down Expand Up @@ -377,7 +378,7 @@ class TTSModel:
# The delay of the audio streams compared to the text stream.
# Note that in addition, the acoustic tokens are delayed wrt the semantic ones.
delay_steps: int
max_speakers: int = 5
max_speakers: int = DEFAULT_MAX_SPEAKERS
multistream: bool = False

# The following params can be overriden to customize generation.
Expand Down Expand Up @@ -411,10 +412,12 @@ def from_checkpoint_info(checkpoint_info: loaders.CheckpointInfo,
machine = StateMachine(
token_ids=token_ids, second_stream_ahead=second_stream_ahead,
max_padding=max_padding, initial_padding=initial_padding)
max_speakers = checkpoint_info.tts_config.get('max_speakers', DEFAULT_MAX_SPEAKERS)
tts_model = TTSModel(
lm=lm, mimi=mimi, tokenizer=tokenizer,
voice_suffix=voice_suffix, voice_repo=voice_repo,
machine=machine, delay_steps=delay_steps, multistream=multistream,
max_speakers=max_speakers,
**kwargs)
mimi_n_q = tts_model.n_q

Expand Down Expand Up @@ -646,7 +649,7 @@ def make_condition_attributes(
if voices:
voice_tensor = None
mask = None
for idx in range(5):
for idx in range(self.max_speakers):
if idx < len(voices):
if voices[idx].suffix != ".safetensors":
raise ValueError(f"Voice file must be a .safetensors file, got {voices[idx]}")
Expand Down
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