# /// script # requires-python = ">=3.12" # dependencies = [ # "moshi==0.2.10", # "torch", # "sphn", # "sounddevice", # ] # /// import argparse from dataclasses import dataclass import sys import numpy as np import queue import sphn import time import torch import typing as tp from moshi.models.loaders import CheckpointInfo from moshi.conditioners import dropout_all_conditions from moshi.models.lm import LMGen from moshi.models.tts import ( Entry, DEFAULT_DSM_TTS_REPO, DEFAULT_DSM_TTS_VOICE_REPO, TTSModel, ConditionAttributes, script_to_entries, ) def prepare_script(model: TTSModel, script: str, first_turn: bool) -> list[Entry]: multi_speaker = first_turn and model.multi_speaker return script_to_entries( model.tokenizer, model.machine.token_ids, model.mimi.frame_rate, [script], multi_speaker=multi_speaker, padding_between=1, ) def _make_null( all_attributes: tp.Sequence[ConditionAttributes], ) -> list[ConditionAttributes]: # When using CFG, returns the null conditions. return dropout_all_conditions(all_attributes) @dataclass class TTSGen: tts_model: TTSModel attributes: tp.Sequence[ConditionAttributes] on_frame: tp.Optional[tp.Callable[[torch.Tensor], None]] = None def __post_init__(self): tts_model = self.tts_model attributes = self.attributes self.offset = 0 self.state = self.tts_model.machine.new_state([]) if tts_model.cfg_coef != 1.0: if tts_model.valid_cfg_conditionings: raise ValueError( "This model does not support direct CFG, but was trained with " "CFG distillation. Pass instead `cfg_coef` to `make_condition_attributes`." ) nulled = _make_null(attributes) attributes = list(attributes) + nulled assert tts_model.lm.condition_provider is not None prepared = tts_model.lm.condition_provider.prepare(attributes) condition_tensors = tts_model.lm.condition_provider(prepared) def _on_text_logits_hook(text_logits): if tts_model.padding_bonus: text_logits[..., tts_model.machine.token_ids.pad] += ( tts_model.padding_bonus ) return text_logits def _on_audio_hook(audio_tokens): audio_offset = tts_model.lm.audio_offset delays = tts_model.lm.delays for q in range(audio_tokens.shape[1]): delay = delays[q + audio_offset] if self.offset < delay + tts_model.delay_steps: audio_tokens[:, q] = tts_model.machine.token_ids.zero def _on_text_hook(text_tokens): tokens = text_tokens.tolist() out_tokens = [] for token in tokens: out_token, _ = tts_model.machine.process(self.offset, self.state, token) out_tokens.append(out_token) text_tokens[:] = torch.tensor( out_tokens, dtype=torch.long, device=text_tokens.device ) tts_model.lm.dep_q = tts_model.n_q self.lm_gen = LMGen( tts_model.lm, temp=tts_model.temp, temp_text=tts_model.temp, cfg_coef=tts_model.cfg_coef, condition_tensors=condition_tensors, on_text_logits_hook=_on_text_logits_hook, on_text_hook=_on_text_hook, on_audio_hook=_on_audio_hook, cfg_is_masked_until=None, cfg_is_no_text=True, ) self.lm_gen.streaming_forever(1) def process_last(self): while len(self.state.entries) > 0 or self.state.end_step is not None: self._step() additional_steps = ( self.tts_model.delay_steps + max(self.tts_model.lm.delays) + 8 ) for _ in range(additional_steps): self._step() def process(self): while len(self.state.entries) > self.tts_model.machine.second_stream_ahead: self._step() def _step(self): missing = self.tts_model.lm.n_q - self.tts_model.lm.dep_q input_tokens = torch.full( (1, missing, 1), self.tts_model.machine.token_ids.zero, dtype=torch.long, device=self.tts_model.lm.device, ) frame = self.lm_gen.step(input_tokens) self.offset += 1 if frame is not None: if self.on_frame is not None: self.on_frame(frame) def append_entry(self, entry): self.state.entries.append(entry) @torch.no_grad() def main(): parser = argparse.ArgumentParser( description="Run Kyutai TTS using the PyTorch implementation" ) parser.add_argument( "out", type=str, help="Output file to generate, use - for playing the audio" ) parser.add_argument( "--hf-repo", type=str, default=DEFAULT_DSM_TTS_REPO, help="HF repo in which to look for the pretrained models.", ) parser.add_argument( "--voice-repo", default=DEFAULT_DSM_TTS_VOICE_REPO, help="HF repo in which to look for pre-computed voice embeddings.", ) parser.add_argument( "--voice", default="expresso/ex03-ex01_happy_001_channel1_334s.wav", help="The voice to use, relative to the voice repo root. " f"See {DEFAULT_DSM_TTS_VOICE_REPO}", ) parser.add_argument( "--device", type=str, default="cuda", help="Device on which to run, defaults to 'cuda'.", ) args = parser.parse_args() print("Loading model...") checkpoint_info = CheckpointInfo.from_hf_repo(args.hf_repo) tts_model = TTSModel.from_checkpoint_info( checkpoint_info, n_q=32, temp=0.6, device=args.device ) voice_path = tts_model.get_voice_path(args.voice) # CFG coef goes here because the model was trained with CFG distillation, # so it's not _actually_ doing CFG at inference time. # Also, if you are generating a dialog, you should have two voices in the list. condition_attributes = tts_model.make_condition_attributes( [voice_path], cfg_coef=2.0 ) if sys.stdin.isatty(): # Interactive print("Enter text to synthesize (Ctrl+D to end input):") if args.out == "-": # Stream the audio to the speakers using sounddevice. import sounddevice as sd pcms = queue.Queue() def _on_frame(frame): if (frame != -1).all(): pcm = tts_model.mimi.decode(frame[:, 1:, :]).cpu().numpy() pcms.put_nowait(np.clip(pcm[0, 0], -1, 1)) def audio_callback(outdata, _a, _b, _c): try: pcm_data = pcms.get(block=False) outdata[:, 0] = pcm_data except queue.Empty: outdata[:] = 0 gen = TTSGen(tts_model, [condition_attributes], on_frame=_on_frame) with sd.OutputStream( samplerate=tts_model.mimi.sample_rate, blocksize=1920, channels=1, callback=audio_callback, ) and tts_model.mimi.streaming(1): first_turn = True for line in sys.stdin: entries = prepare_script(tts_model, line.strip(), first_turn=first_turn) first_turn = False for entry in entries: gen.append_entry(entry) gen.process() gen.process_last() while True: if pcms.qsize() == 0: break time.sleep(1) else: pcms = [] def _on_frame(frame: torch.Tensor): if (frame != -1).all(): pcm = tts_model.mimi.decode(frame[:, 1:, :]).cpu().numpy() pcms.append(np.clip(pcm[0, 0])) gen = TTSGen(tts_model, [condition_attributes], on_frame=_on_frame) with tts_model.mimi.streaming(1): first_turn = True for line in sys.stdin: entries = prepare_script(tts_model, line.strip(), first_turn=first_turn) first_turn = False for entry in entries: gen.append_entry(entry) gen.process() gen.process_last() pcm = np.concatenate(pcms, axis=-1) sphn.write_wav(args.out, pcm, tts_model.mimi.sample_rate) if __name__ == "__main__": main()