tortoise-tts/tortoise/api.py

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import os
import random
import uuid
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import gc
from time import time
from urllib import request
from urllib.request import ProxyHandler, build_opener, install_opener
import torch
import torch.nn.functional as F
import progressbar
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import torchaudio
from tortoise.models.classifier import AudioMiniEncoderWithClassifierHead
from tortoise.models.diffusion_decoder import DiffusionTts
from tortoise.models.autoregressive import UnifiedVoice
from tqdm import tqdm
from tortoise.models.arch_util import TorchMelSpectrogram
from tortoise.models.clvp import CLVP
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from tortoise.models.cvvp import CVVP
from tortoise.models.random_latent_generator import RandomLatentConverter
from tortoise.models.vocoder import UnivNetGenerator
from tortoise.models.bigvgan import BigVGAN
from tortoise.utils.audio import wav_to_univnet_mel, denormalize_tacotron_mel
from tortoise.utils.diffusion import SpacedDiffusion, space_timesteps, get_named_beta_schedule
from tortoise.utils.tokenizer import VoiceBpeTokenizer
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from tortoise.utils.wav2vec_alignment import Wav2VecAlignment
from tortoise.utils.device import get_device, get_device_name, get_device_batch_size, print_stats, do_gc
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pbar = None
STOP_SIGNAL = False
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MODELS_DIR = os.environ.get('TORTOISE_MODELS_DIR', os.path.realpath(os.path.join(os.getcwd(), './models/tortoise/')))
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MODELS = {
'autoregressive.pth': 'https://huggingface.co/jbetker/tortoise-tts-v2/resolve/main/.models/autoregressive.pth',
'classifier.pth': 'https://huggingface.co/jbetker/tortoise-tts-v2/resolve/main/.models/classifier.pth',
'clvp2.pth': 'https://huggingface.co/jbetker/tortoise-tts-v2/resolve/main/.models/clvp2.pth',
'cvvp.pth': 'https://huggingface.co/jbetker/tortoise-tts-v2/resolve/main/.models/cvvp.pth',
'diffusion_decoder.pth': 'https://huggingface.co/jbetker/tortoise-tts-v2/resolve/main/.models/diffusion_decoder.pth',
'vocoder.pth': 'https://huggingface.co/jbetker/tortoise-tts-v2/resolve/main/.models/vocoder.pth',
'rlg_auto.pth': 'https://huggingface.co/jbetker/tortoise-tts-v2/resolve/main/.models/rlg_auto.pth',
'rlg_diffuser.pth': 'https://huggingface.co/jbetker/tortoise-tts-v2/resolve/main/.models/rlg_diffuser.pth',
'bigvgan_base_24khz_100band.pth': 'https://huggingface.co/ecker/tortoise-tts-models/resolve/main/models/bigvgan_base_24khz_100band.pth',
'bigvgan_24khz_100band.pth': 'https://huggingface.co/ecker/tortoise-tts-models/resolve/main/models/bigvgan_24khz_100band.pth',
'bigvgan_base_24khz_100band.json': 'https://huggingface.co/ecker/tortoise-tts-models/resolve/main/models/bigvgan_base_24khz_100band.json',
'bigvgan_24khz_100band.json': 'https://huggingface.co/ecker/tortoise-tts-models/resolve/main/models/bigvgan_24khz_100band.json',
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}
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def hash_file(path, algo="md5", buffer_size=0):
import hashlib
hash = None
if algo == "md5":
hash = hashlib.md5()
elif algo == "sha1":
hash = hashlib.sha1()
else:
raise Exception(f'Unknown hash algorithm specified: {algo}')
if not os.path.exists(path):
raise Exception(f'Path not found: {path}')
with open(path, 'rb') as f:
if buffer_size > 0:
while True:
data = f.read(buffer_size)
if not data:
break
hash.update(data)
else:
hash.update(f.read())
return "{0}".format(hash.hexdigest())
def check_for_kill_signal():
global STOP_SIGNAL
if STOP_SIGNAL:
STOP_SIGNAL = False
raise Exception("Kill signal detected")
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def download_models(specific_models=None):
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"""
Call to download all the models that Tortoise uses.
"""
os.makedirs(MODELS_DIR, exist_ok=True)
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def show_progress(block_num, block_size, total_size):
global pbar
if pbar is None:
pbar = progressbar.ProgressBar(maxval=total_size)
pbar.start()
downloaded = block_num * block_size
if downloaded < total_size:
pbar.update(downloaded)
else:
pbar.finish()
pbar = None
for model_name, url in MODELS.items():
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if specific_models is not None and model_name not in specific_models:
continue
model_path = os.path.join(MODELS_DIR, model_name)
if os.path.exists(model_path):
continue
print(f'Downloading {model_name} from {url}...')
proxy = ProxyHandler({})
opener = build_opener(proxy)
opener.addheaders = [('User-Agent','mrq/AI-Voice-Cloning')]
install_opener(opener)
request.urlretrieve(url, model_path, show_progress)
print('Done.')
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def get_model_path(model_name, models_dir=MODELS_DIR):
"""
Get path to given model, download it if it doesn't exist.
"""
if model_name not in MODELS:
raise ValueError(f'Model {model_name} not found in available models.')
model_path = os.path.join(models_dir, model_name)
if not os.path.exists(model_path) and models_dir == MODELS_DIR:
download_models([model_name])
return model_path
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def pad_or_truncate(t, length):
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"""
Utility function for forcing <t> to have the specified sequence length, whether by clipping it or padding it with 0s.
"""
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if t.shape[-1] == length:
return t
elif t.shape[-1] < length:
return F.pad(t, (0, length-t.shape[-1]))
else:
return t[..., :length]
def load_discrete_vocoder_diffuser(trained_diffusion_steps=4000, desired_diffusion_steps=200, cond_free=True, cond_free_k=1):
"""
Helper function to load a GaussianDiffusion instance configured for use as a vocoder.
"""
return SpacedDiffusion(use_timesteps=space_timesteps(trained_diffusion_steps, [desired_diffusion_steps]), model_mean_type='epsilon',
model_var_type='learned_range', loss_type='mse', betas=get_named_beta_schedule('linear', trained_diffusion_steps),
conditioning_free=cond_free, conditioning_free_k=cond_free_k)
@torch.inference_mode()
def format_conditioning(clip, cond_length=132300, device='cuda', sampling_rate=22050):
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"""
Converts the given conditioning signal to a MEL spectrogram and clips it as expected by the models.
"""
gap = clip.shape[-1] - cond_length
if gap < 0:
clip = F.pad(clip, pad=(0, abs(gap)))
elif gap > 0:
rand_start = random.randint(0, gap)
clip = clip[:, rand_start:rand_start + cond_length]
mel_clip = TorchMelSpectrogram(sampling_rate=sampling_rate)(clip.unsqueeze(0)).squeeze(0)
mel_clip = mel_clip.unsqueeze(0)
return migrate_to_device(mel_clip, device)
def fix_autoregressive_output(codes, stop_token, complain=True):
"""
This function performs some padding on coded audio that fixes a mismatch issue between what the diffusion model was
trained on and what the autoregressive code generator creates (which has no padding or end).
This is highly specific to the DVAE being used, so this particular coding will not necessarily work if used with
a different DVAE. This can be inferred by feeding a audio clip padded with lots of zeros on the end through the DVAE
and copying out the last few codes.
Failing to do this padding will produce speech with a harsh end that sounds like "BLAH" or similar.
"""
# Strip off the autoregressive stop token and add padding.
stop_token_indices = (codes == stop_token).nonzero()
if len(stop_token_indices) == 0:
if complain:
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print("No stop tokens found in one of the generated voice clips. This typically means the spoken audio is "
"too long. In some cases, the output will still be good, though. Listen to it and if it is missing words, "
"try breaking up your input text.")
return codes
else:
codes[stop_token_indices] = 83
stm = stop_token_indices.min().item()
codes[stm:] = 83
if stm - 3 < codes.shape[0]:
codes[-3] = 45
codes[-2] = 45
codes[-1] = 248
return codes
@torch.inference_mode()
def do_spectrogram_diffusion(diffusion_model, diffuser, latents, conditioning_latents, temperature=1, verbose=True, desc=None, sampler="P", input_sample_rate=22050, output_sample_rate=24000):
"""
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Uses the specified diffusion model to convert discrete codes into a spectrogram.
"""
with torch.no_grad():
output_seq_len = latents.shape[1] * 4 * output_sample_rate // input_sample_rate # This diffusion model converts from 22kHz spectrogram codes to a 24kHz spectrogram signal.
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output_shape = (latents.shape[0], 100, output_seq_len)
precomputed_embeddings = diffusion_model.timestep_independent(latents, conditioning_latents, output_seq_len, False)
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noise = torch.randn(output_shape, device=latents.device) * temperature
diffuser.sampler = sampler.lower()
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mel = diffuser.sample_loop(diffusion_model, output_shape, noise=noise,
model_kwargs={'precomputed_aligned_embeddings': precomputed_embeddings}, desc=desc)
mel = denormalize_tacotron_mel(mel)[:,:,:output_seq_len]
if get_device_name() == "dml":
mel = mel.cpu()
return mel
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def classify_audio_clip(clip):
"""
Returns whether or not Tortoises' classifier thinks the given clip came from Tortoise.
:param clip: torch tensor containing audio waveform data (get it from load_audio)
:return: True if the clip was classified as coming from Tortoise and false if it was classified as real.
"""
classifier = AudioMiniEncoderWithClassifierHead(2, spec_dim=1, embedding_dim=512, depth=5, downsample_factor=4,
resnet_blocks=2, attn_blocks=4, num_attn_heads=4, base_channels=32,
dropout=0, kernel_size=5, distribute_zero_label=False)
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classifier.load_state_dict(torch.load(get_model_path('classifier.pth'), map_location=torch.device('cpu')))
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clip = clip.cpu().unsqueeze(0)
results = F.softmax(classifier(clip), dim=-1)
return results[0][0]
def migrate_to_device( t, device ):
if t is None:
return t
if not hasattr(t, 'device'):
t.device = device
t.manually_track_device = True
elif t.device == device:
return t
if hasattr(t, 'manually_track_device') and t.manually_track_device:
t.device = device
t = t.to(device)
do_gc()
return t
class TextToSpeech:
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"""
Main entry point into Tortoise.
"""
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def __init__(self, autoregressive_batch_size=None, models_dir=MODELS_DIR, enable_redaction=True, device=None,
minor_optimizations=True,
unsqueeze_sample_batches=False,
input_sample_rate=22050, output_sample_rate=24000,
autoregressive_model_path=None, diffusion_model_path=None, vocoder_model=None, tokenizer_json=None,
# ):
use_deepspeed=False): # Add use_deepspeed parameter
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"""
Constructor
:param autoregressive_batch_size: Specifies how many samples to generate per batch. Lower this if you are seeing
GPU OOM errors. Larger numbers generates slightly faster.
:param models_dir: Where model weights are stored. This should only be specified if you are providing your own
models, otherwise use the defaults.
:param enable_redaction: When true, text enclosed in brackets are automatically redacted from the spoken output
(but are still rendered by the model). This can be used for prompt engineering.
Default is true.
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:param device: Device to use when running the model. If omitted, the device will be automatically chosen.
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"""
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self.loading = True
if device is None:
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device = get_device(verbose=True)
self.version = [2,4,4] # to-do, autograb this from setup.py, or have setup.py autograb this
self.input_sample_rate = input_sample_rate
self.output_sample_rate = output_sample_rate
self.minor_optimizations = minor_optimizations
self.unsqueeze_sample_batches = unsqueeze_sample_batches
self.use_deepspeed = use_deepspeed # Store use_deepspeed as an instance variable
print(f'use_deepspeed api_debug {use_deepspeed}')
# for clarity, it's simpler to split these up and just predicate them on requesting VRAM-consuming optimizations
self.preloaded_tensors = minor_optimizations
self.use_kv_cache = minor_optimizations
if get_device_name() == "dml": # does not work with DirectML
print("KV caching requested but not supported with the DirectML backend, disabling...")
self.use_kv_cache = False
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self.models_dir = models_dir
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self.autoregressive_batch_size = get_device_batch_size() if autoregressive_batch_size is None or autoregressive_batch_size == 0 else autoregressive_batch_size
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self.enable_redaction = enable_redaction
self.device = device
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if self.enable_redaction:
self.aligner = Wav2VecAlignment(device='cpu' if get_device_name() == "dml" else self.device)
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self.load_tokenizer_json(tokenizer_json)
if os.path.exists(f'{models_dir}/autoregressive.ptt'):
self.autoregressive = torch.jit.load(f'{models_dir}/autoregressive.ptt')
else:
if not autoregressive_model_path or not os.path.exists(autoregressive_model_path):
autoregressive_model_path = get_model_path('autoregressive.pth', models_dir)
self.load_autoregressive_model(autoregressive_model_path)
if os.path.exists(f'{models_dir}/diffusion_decoder.ptt'):
self.diffusion = torch.jit.load(f'{models_dir}/diffusion_decoder.ptt')
else:
if not diffusion_model_path or not os.path.exists(diffusion_model_path):
diffusion_model_path = get_model_path('diffusion_decoder.pth', models_dir)
self.load_diffusion_model(diffusion_model_path)
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self.clvp = CLVP(dim_text=768, dim_speech=768, dim_latent=768, num_text_tokens=256, text_enc_depth=20,
text_seq_len=350, text_heads=12,
num_speech_tokens=8192, speech_enc_depth=20, speech_heads=12, speech_seq_len=430,
use_xformers=True).cpu().eval()
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self.clvp.load_state_dict(torch.load(get_model_path('clvp2.pth', models_dir)))
self.cvvp = None # CVVP model is only loaded if used.
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self.vocoder_model = vocoder_model
self.load_vocoder_model(self.vocoder_model)
# Random latent generators (RLGs) are loaded lazily.
self.rlg_auto = None
self.rlg_diffusion = None
if self.preloaded_tensors:
self.autoregressive = migrate_to_device( self.autoregressive, self.device )
self.diffusion = migrate_to_device( self.diffusion, self.device )
self.clvp = migrate_to_device( self.clvp, self.device )
self.vocoder = migrate_to_device( self.vocoder, self.device )
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self.loading = False
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def load_autoregressive_model(self, autoregressive_model_path, is_xtts=False):
if hasattr(self,"autoregressive_model_path") and os.path.samefile(self.autoregressive_model_path, autoregressive_model_path):
return
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self.autoregressive_model_path = autoregressive_model_path if autoregressive_model_path and os.path.exists(autoregressive_model_path) else get_model_path('autoregressive.pth', self.models_dir)
new_hash = hash_file(self.autoregressive_model_path)
if hasattr(self,"autoregressive_model_hash") and self.autoregressive_model_hash == new_hash:
return
self.autoregressive_model_hash = new_hash
self.loading = True
print(f"Loading autoregressive model: {self.autoregressive_model_path}")
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if hasattr(self, 'autoregressive'):
del self.autoregressive
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# XTTS requires a different "dimensionality" for its autoregressive model
if new_hash == "e4ce21eae0043f7691d6a6c8540b74b8" or is_xtts:
dimensionality = {
"max_mel_tokens": 605,
"max_text_tokens": 402,
"max_prompt_tokens": 70,
"max_conditioning_inputs": 1,
"layers": 30,
"model_dim": 1024,
"heads": 16,
"number_text_tokens": 5023, # -1
"start_text_token": 261,
"stop_text_token": 0,
"number_mel_codes": 8194,
"start_mel_token": 8192,
"stop_mel_token": 8193,
}
else:
dimensionality = {
"max_mel_tokens": 604,
"max_text_tokens": 402,
"max_conditioning_inputs": 2,
"layers": 30,
"model_dim": 1024,
"heads": 16,
"number_text_tokens": 255,
"start_text_token": 255,
"checkpointing": False,
"train_solo_embeddings": False
}
self.autoregressive = UnifiedVoice(**dimensionality).cpu().eval()
self.autoregressive.load_state_dict(torch.load(self.autoregressive_model_path))
self.autoregressive.post_init_gpt2_config(use_deepspeed=self.use_deepspeed, kv_cache=self.use_kv_cache)
if self.preloaded_tensors:
self.autoregressive = migrate_to_device( self.autoregressive, self.device )
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self.loading = False
print(f"Loaded autoregressive model")
def load_diffusion_model(self, diffusion_model_path):
if hasattr(self,"diffusion_model_path") and os.path.samefile(self.diffusion_model_path, diffusion_model_path):
return
self.loading = True
self.diffusion_model_path = diffusion_model_path if diffusion_model_path and os.path.exists(diffusion_model_path) else get_model_path('diffusion_decoder.pth', self.models_dir)
self.diffusion_model_hash = hash_file(self.diffusion_model_path)
if hasattr(self, 'diffusion'):
del self.diffusion
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# XTTS does not require a different "dimensionality" for its diffusion model
dimensionality = {
"model_channels": 1024,
"num_layers": 10,
"in_channels": 100,
"out_channels": 200,
"in_latent_channels": 1024,
"in_tokens": 8193,
"dropout": 0,
"use_fp16": False,
"num_heads": 16,
"layer_drop": 0,
"unconditioned_percentage": 0
}
self.diffusion = DiffusionTts(**dimensionality)
self.diffusion.load_state_dict(torch.load(get_model_path('diffusion_decoder.pth', self.models_dir)))
if self.preloaded_tensors:
self.diffusion = migrate_to_device( self.diffusion, self.device )
self.loading = False
print(f"Loaded diffusion model")
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def load_vocoder_model(self, vocoder_model):
if hasattr(self,"vocoder_model_path") and os.path.samefile(self.vocoder_model_path, vocoder_model):
return
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self.loading = True
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if hasattr(self, 'vocoder'):
del self.vocoder
print("Loading vocoder model:", vocoder_model)
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if vocoder_model is None:
vocoder_model = 'bigvgan_24khz_100band'
if 'bigvgan' in vocoder_model:
# credit to https://github.com/deviandice / https://git.ecker.tech/mrq/ai-voice-cloning/issues/52
vocoder_key = 'generator'
self.vocoder_model_path = 'bigvgan_24khz_100band.pth'
if f'{vocoder_model}.pth' in MODELS:
self.vocoder_model_path = f'{vocoder_model}.pth'
vocoder_config = 'bigvgan_24khz_100band.json'
if f'{vocoder_model}.json' in MODELS:
vocoder_config = f'{vocoder_model}.json'
vocoder_config = get_model_path(vocoder_config, self.models_dir)
self.vocoder = BigVGAN(config=vocoder_config).cpu()
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#elif vocoder_model == "univnet":
else:
vocoder_key = 'model_g'
self.vocoder_model_path = 'vocoder.pth'
self.vocoder = UnivNetGenerator().cpu()
print(f"Loading vocoder model: {self.vocoder_model_path}")
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self.vocoder.load_state_dict(torch.load(get_model_path(self.vocoder_model_path, self.models_dir), map_location=torch.device('cpu'))[vocoder_key])
self.vocoder.eval(inference=True)
if self.preloaded_tensors:
self.vocoder = migrate_to_device( self.vocoder, self.device )
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self.loading = False
print(f"Loaded vocoder model")
def load_tokenizer_json(self, tokenizer_json):
if hasattr(self,"tokenizer_json") and os.path.samefile(self.tokenizer_json, tokenizer_json):
return
self.loading = True
self.tokenizer_json = tokenizer_json if tokenizer_json else os.path.join(os.path.dirname(os.path.realpath(__file__)), '../tortoise/data/tokenizer.json')
print("Loading tokenizer JSON:", self.tokenizer_json)
if hasattr(self, 'tokenizer'):
del self.tokenizer
self.tokenizer = VoiceBpeTokenizer(vocab_file=self.tokenizer_json)
self.loading = False
print(f"Loaded tokenizer")
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def load_cvvp(self):
"""Load CVVP model."""
self.cvvp = CVVP(model_dim=512, transformer_heads=8, dropout=0, mel_codes=8192, conditioning_enc_depth=8, cond_mask_percentage=0,
speech_enc_depth=8, speech_mask_percentage=0, latent_multiplier=1).cpu().eval()
self.cvvp.load_state_dict(torch.load(get_model_path('cvvp.pth', self.models_dir)))
if self.preloaded_tensors:
self.cvvp = migrate_to_device( self.cvvp, self.device )
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@torch.inference_mode()
def get_conditioning_latents(self, voice_samples, return_mels=False, verbose=False, slices=1, max_chunk_size=None, force_cpu=False, original_ar=False, original_diffusion=False):
"""
Transforms one or more voice_samples into a tuple (autoregressive_conditioning_latent, diffusion_conditioning_latent).
These are expressive learned latents that encode aspects of the provided clips like voice, intonation, and acoustic
properties.
:param voice_samples: List of 2 or more ~10 second reference clips, which should be torch tensors containing 22.05kHz waveform data.
"""
with torch.no_grad():
# computing conditional latents requires being done on the CPU if using DML because M$ still hasn't implemented some core functions
if get_device_name() == "dml":
force_cpu = True
device = torch.device('cpu') if force_cpu else self.device
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if not isinstance(voice_samples, list):
voice_samples = [voice_samples]
resampler_22K = torchaudio.transforms.Resample(
self.input_sample_rate,
22050,
lowpass_filter_width=16,
rolloff=0.85,
resampling_method="kaiser_window",
beta=8.555504641634386,
).to(device)
resampler_24K = torchaudio.transforms.Resample(
self.input_sample_rate,
24000,
lowpass_filter_width=16,
rolloff=0.85,
resampling_method="kaiser_window",
beta=8.555504641634386,
).to(device)
voice_samples = [migrate_to_device(v, device) for v in voice_samples]
auto_conds = []
diffusion_conds = []
if original_ar:
samples = [resampler_22K(sample) for sample in voice_samples]
for sample in tqdm(samples, desc="Computing AR conditioning latents..."):
auto_conds.append(format_conditioning(sample, device=device, sampling_rate=self.input_sample_rate, cond_length=132300))
else:
samples = [resampler_22K(sample) for sample in voice_samples]
concat = torch.cat(samples, dim=-1)
chunk_size = concat.shape[-1]
if slices == 0:
slices = 1
elif max_chunk_size is not None and chunk_size > max_chunk_size:
slices = 1
while int(chunk_size / slices) > max_chunk_size:
slices = slices + 1
chunks = torch.chunk(concat, slices, dim=1)
chunk_size = chunks[0].shape[-1]
for chunk in tqdm(chunks, desc="Computing AR conditioning latents..."):
auto_conds.append(format_conditioning(chunk, device=device, sampling_rate=self.input_sample_rate, cond_length=chunk_size))
if original_diffusion:
samples = [resampler_24K(sample) for sample in voice_samples]
for sample in tqdm(samples, desc="Computing diffusion conditioning latents..."):
sample = pad_or_truncate(sample, 102400)
cond_mel = wav_to_univnet_mel(migrate_to_device(sample, device), do_normalization=False, device=self.device)
diffusion_conds.append(cond_mel)
else:
samples = [resampler_24K(sample) for sample in voice_samples]
for chunk in tqdm(chunks, desc="Computing diffusion conditioning latents..."):
check_for_kill_signal()
chunk = pad_or_truncate(chunk, chunk_size)
cond_mel = wav_to_univnet_mel(migrate_to_device( chunk, device ), do_normalization=False, device=device)
diffusion_conds.append(cond_mel)
auto_conds = torch.stack(auto_conds, dim=1)
self.autoregressive = migrate_to_device( self.autoregressive, device )
auto_latent = self.autoregressive.get_conditioning(auto_conds)
self.autoregressive = migrate_to_device( self.autoregressive, self.device if self.preloaded_tensors else 'cpu' )
diffusion_conds = torch.stack(diffusion_conds, dim=1)
self.diffusion = migrate_to_device( self.diffusion, device )
diffusion_latent = self.diffusion.get_conditioning(diffusion_conds)
self.diffusion = migrate_to_device( self.diffusion, self.device if self.preloaded_tensors else 'cpu' )
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if return_mels:
return auto_latent, diffusion_latent, auto_conds, diffusion_conds
else:
return auto_latent, diffusion_latent
def get_random_conditioning_latents(self):
# Lazy-load the RLG models.
if self.rlg_auto is None:
self.rlg_auto = RandomLatentConverter(1024).eval()
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self.rlg_auto.load_state_dict(torch.load(get_model_path('rlg_auto.pth', self.models_dir), map_location=torch.device('cpu')))
self.rlg_diffusion = RandomLatentConverter(2048).eval()
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self.rlg_diffusion.load_state_dict(torch.load(get_model_path('rlg_diffuser.pth', self.models_dir), map_location=torch.device('cpu')))
with torch.no_grad():
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return self.rlg_auto(torch.tensor([0.0])), self.rlg_diffusion(torch.tensor([0.0]))
def tts_with_preset(self, text, preset='fast', **kwargs):
"""
Calls TTS with one of a set of preset generation parameters. Options:
'ultra_fast': Produces speech at a speed which belies the name of this repo. (Not really, but it's definitely fastest).
'fast': Decent quality speech at a decent inference rate. A good choice for mass inference.
'standard': Very good quality. This is generally about as good as you are going to get.
'high_quality': Use if you want the absolute best. This is not really worth the compute, though.
"""
# Use generally found best tuning knobs for generation.
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settings = {'temperature': .8, 'length_penalty': 1.0, 'repetition_penalty': 2.0,
'top_p': .8,
'cond_free_k': 2.0, 'diffusion_temperature': 1.0}
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# Presets are defined here.
presets = {
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'ultra_fast': {'num_autoregressive_samples': 16, 'diffusion_iterations': 30, 'cond_free': False},
'fast': {'num_autoregressive_samples': 96, 'diffusion_iterations': 80},
'standard': {'num_autoregressive_samples': 256, 'diffusion_iterations': 200},
'high_quality': {'num_autoregressive_samples': 256, 'diffusion_iterations': 400},
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}
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settings.update(presets[preset])
settings.update(kwargs) # allow overriding of preset settings with kwargs
return self.tts(text, **settings)
@torch.inference_mode()
def tts(self, text, voice_samples=None, conditioning_latents=None, k=1, verbose=True, use_deterministic_seed=None,
return_deterministic_state=False,
# autoregressive generation parameters follow
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num_autoregressive_samples=512, temperature=.8, length_penalty=1, repetition_penalty=2.0, top_p=.8, max_mel_tokens=500,
sample_batch_size=None,
autoregressive_model=None,
diffusion_model=None,
tokenizer_json=None,
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# CVVP parameters follow
cvvp_amount=.0,
# diffusion generation parameters follow
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diffusion_iterations=100, cond_free=True, cond_free_k=2, diffusion_temperature=1.0,
diffusion_sampler="P",
breathing_room=8,
half_p=False,
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**hf_generate_kwargs):
"""
Produces an audio clip of the given text being spoken with the given reference voice.
:param text: Text to be spoken.
:param voice_samples: List of 2 or more ~10 second reference clips which should be torch tensors containing 22.05kHz waveform data.
:param conditioning_latents: A tuple of (autoregressive_conditioning_latent, diffusion_conditioning_latent), which
can be provided in lieu of voice_samples. This is ignored unless voice_samples=None.
Conditioning latents can be retrieved via get_conditioning_latents().
:param k: The number of returned clips. The most likely (as determined by Tortoises' CLVP model) clips are returned.
:param verbose: Whether or not to print log messages indicating the progress of creating a clip. Default=true.
~~AUTOREGRESSIVE KNOBS~~
:param num_autoregressive_samples: Number of samples taken from the autoregressive model, all of which are filtered using CLVP.
As Tortoise is a probabilistic model, more samples means a higher probability of creating something "great".
:param temperature: The softmax temperature of the autoregressive model.
:param length_penalty: A length penalty applied to the autoregressive decoder. Higher settings causes the model to produce more terse outputs.
:param repetition_penalty: A penalty that prevents the autoregressive decoder from repeating itself during decoding. Can be used to reduce the incidence
of long silences or "uhhhhhhs", etc.
:param top_p: P value used in nucleus sampling. (0,1]. Lower values mean the decoder produces more "likely" (aka boring) outputs.
:param max_mel_tokens: Restricts the output length. (0,600] integer. Each unit is 1/20 of a second.
:param typical_sampling: Turns typical sampling on or off. This sampling mode is discussed in this paper: https://arxiv.org/abs/2202.00666
I was interested in the premise, but the results were not as good as I was hoping. This is off by default, but
could use some tuning.
:param typical_mass: The typical_mass parameter from the typical_sampling algorithm.
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~~CLVP-CVVP KNOBS~~
:param cvvp_amount: Controls the influence of the CVVP model in selecting the best output from the autoregressive model.
[0,1]. Values closer to 1 mean the CVVP model is more important, 0 disables the CVVP model.
~~DIFFUSION KNOBS~~
:param diffusion_iterations: Number of diffusion steps to perform. [0,4000]. More steps means the network has more chances to iteratively refine
the output, which should theoretically mean a higher quality output. Generally a value above 250 is not noticeably better,
however.
:param cond_free: Whether or not to perform conditioning-free diffusion. Conditioning-free diffusion performs two forward passes for
each diffusion step: one with the outputs of the autoregressive model and one with no conditioning priors. The output
of the two is blended according to the cond_free_k value below. Conditioning-free diffusion is the real deal, and
dramatically improves realism.
:param cond_free_k: Knob that determines how to balance the conditioning free signal with the conditioning-present signal. [0,inf].
As cond_free_k increases, the output becomes dominated by the conditioning-free signal.
Formula is: output=cond_present_output*(cond_free_k+1)-cond_absenct_output*cond_free_k
:param diffusion_temperature: Controls the variance of the noise fed into the diffusion model. [0,1]. Values at 0
are the "mean" prediction of the diffusion network and will sound bland and smeared.
~~OTHER STUFF~~
:param hf_generate_kwargs: The huggingface Transformers generate API is used for the autoregressive transformer.
Extra keyword args fed to this function get forwarded directly to that API. Documentation
here: https://huggingface.co/docs/transformers/internal/generation_utils
:return: Generated audio clip(s) as a torch tensor. Shape 1,S if k=1 else, (k,1,S) where S is the sample length.
Sample rate is 24kHz.
"""
if get_device_name() == "dml" and half_p:
print("Float16 requested but not supported with the DirectML backend, disabling...")
half_p = False
self.diffusion.enable_fp16 = half_p
deterministic_seed = self.deterministic_state(seed=use_deterministic_seed)
if autoregressive_model is None:
autoregressive_model = self.autoregressive_model_path
elif autoregressive_model != self.autoregressive_model_path:
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self.load_autoregressive_model(autoregressive_model)
if diffusion_model is None:
diffusion_model = self.diffusion_model_path
elif diffusion_model != self.diffusion_model_path:
self.load_diffusion_model(diffusion_model)
if tokenizer_json is None:
tokenizer_json = self.tokenizer_json
elif tokenizer_json != self.tokenizer_json:
self.load_tokenizer_json(tokenizer_json)
text_tokens = torch.IntTensor(self.tokenizer.encode(text)).unsqueeze(0)
text_tokens = migrate_to_device( text_tokens, self.device )
text_tokens = F.pad(text_tokens, (0, 1)) # This may not be necessary.
assert text_tokens.shape[-1] < 400, 'Too much text provided. Break the text up into separate segments and re-try inference.'
auto_conds = None
if voice_samples is not None:
auto_conditioning, diffusion_conditioning, auto_conds, _ = self.get_conditioning_latents(voice_samples, return_mels=True, verbose=True)
elif conditioning_latents is not None:
latent_tuple = conditioning_latents
if len(latent_tuple) == 2:
auto_conditioning, diffusion_conditioning = conditioning_latents
else:
auto_conditioning, diffusion_conditioning, auto_conds, _ = conditioning_latents
else:
auto_conditioning, diffusion_conditioning = self.get_random_conditioning_latents()
diffuser = load_discrete_vocoder_diffuser(desired_diffusion_steps=diffusion_iterations, cond_free=cond_free, cond_free_k=cond_free_k)
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self.autoregressive_batch_size = get_device_batch_size() if sample_batch_size is None or sample_batch_size == 0 else sample_batch_size
with torch.no_grad():
samples = []
num_batches = num_autoregressive_samples // self.autoregressive_batch_size
if num_autoregressive_samples < self.autoregressive_batch_size:
num_autoregressive_samples = 1
stop_mel_token = self.autoregressive.stop_mel_token
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calm_token = 83 # This is the token for coding silence, which is fixed in place with "fix_autoregressive_output"
self.autoregressive = migrate_to_device( self.autoregressive, self.device )
auto_conditioning = migrate_to_device( auto_conditioning, self.device )
text_tokens = migrate_to_device( text_tokens, self.device )
with torch.autocast(device_type='cuda', dtype=torch.float16, enabled=half_p):
for b in tqdm(range(num_batches), desc="Generating autoregressive samples"):
check_for_kill_signal()
codes = self.autoregressive.inference_speech(auto_conditioning, text_tokens,
do_sample=True,
top_p=top_p,
temperature=temperature,
num_return_sequences=self.autoregressive_batch_size,
length_penalty=length_penalty,
repetition_penalty=repetition_penalty,
max_generate_length=max_mel_tokens,
**hf_generate_kwargs)
padding_needed = max_mel_tokens - codes.shape[1]
codes = F.pad(codes, (0, padding_needed), value=stop_mel_token)
samples.append(codes)
if not self.preloaded_tensors:
self.autoregressive = migrate_to_device( self.autoregressive, 'cpu' )
if self.unsqueeze_sample_batches:
new_samples = []
for batch in samples:
for i in range(batch.shape[0]):
new_samples.append(batch[i].unsqueeze(0))
samples = new_samples
clip_results = []
if auto_conds is not None:
auto_conditioning = migrate_to_device( auto_conditioning, self.device )
with torch.autocast(device_type='cuda', dtype=torch.float16, enabled=half_p):
if not self.preloaded_tensors:
self.autoregressive = migrate_to_device( self.autoregressive, 'cpu' )
self.clvp = migrate_to_device( self.clvp, self.device )
if cvvp_amount > 0:
if self.cvvp is None:
self.load_cvvp()
if not self.preloaded_tensors:
self.cvvp = migrate_to_device( self.cvvp, self.device )
desc="Computing best candidates"
if verbose:
if self.cvvp is None:
desc = "Computing best candidates using CLVP"
else:
desc = f"Computing best candidates using CLVP {((1-cvvp_amount) * 100):2.0f}% and CVVP {(cvvp_amount * 100):2.0f}%"
for batch in tqdm(samples, desc=desc):
check_for_kill_signal()
for i in range(batch.shape[0]):
batch[i] = fix_autoregressive_output(batch[i], stop_mel_token)
if cvvp_amount != 1:
clvp = self.clvp(text_tokens.repeat(batch.shape[0], 1), batch, return_loss=False)
if auto_conds is not None and cvvp_amount > 0:
cvvp_accumulator = 0
for cl in range(auto_conds.shape[1]):
cvvp_accumulator = cvvp_accumulator + self.cvvp(auto_conds[:, cl].repeat(batch.shape[0], 1, 1), batch, return_loss=False)
cvvp = cvvp_accumulator / auto_conds.shape[1]
if cvvp_amount == 1:
clip_results.append(cvvp)
else:
clip_results.append(cvvp * cvvp_amount + clvp * (1-cvvp_amount))
else:
clip_results.append(clvp)
if not self.preloaded_tensors and auto_conds is not None:
auto_conds = migrate_to_device( auto_conds, 'cpu' )
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clip_results = torch.cat(clip_results, dim=0)
samples = torch.cat(samples, dim=0)
if k < num_autoregressive_samples:
best_results = samples[torch.topk(clip_results, k=k).indices]
else:
best_results = samples
if not self.preloaded_tensors:
self.clvp = migrate_to_device( self.clvp, 'cpu' )
self.cvvp = migrate_to_device( self.cvvp, 'cpu' )
if get_device_name() == "dml":
text_tokens = migrate_to_device( text_tokens, 'cpu' )
best_results = migrate_to_device( best_results, 'cpu' )
auto_conditioning = migrate_to_device( auto_conditioning, 'cpu' )
self.autoregressive = migrate_to_device( self.autoregressive, 'cpu' )
else:
auto_conditioning = auto_conditioning.to(self.device)
self.autoregressive = self.autoregressive.to(self.device)
del samples
# The diffusion model actually wants the last hidden layer from the autoregressive model as conditioning
# inputs. Re-produce those for the top results. This could be made more efficient by storing all of these
# results, but will increase memory usage.
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best_latents = self.autoregressive(auto_conditioning.repeat(k, 1), text_tokens.repeat(k, 1),
torch.tensor([text_tokens.shape[-1]], device=text_tokens.device), best_results,
torch.tensor([best_results.shape[-1]*self.autoregressive.mel_length_compression], device=text_tokens.device),
return_latent=True, clip_inputs=False)
diffusion_conditioning = migrate_to_device( diffusion_conditioning, self.device )
if get_device_name() == "dml":
self.autoregressive = migrate_to_device( self.autoregressive, self.device )
best_results = migrate_to_device( best_results, self.device )
best_latents = migrate_to_device( best_latents, self.device )
self.vocoder = migrate_to_device( self.vocoder, 'cpu' )
else:
if not self.preloaded_tensors:
self.autoregressive = migrate_to_device( self.autoregressive, 'cpu' )
self.diffusion = migrate_to_device( self.diffusion, self.device )
self.vocoder = migrate_to_device( self.vocoder, self.device )
del text_tokens
del auto_conditioning
wav_candidates = []
for b in range(best_results.shape[0]):
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codes = best_results[b].unsqueeze(0)
latents = best_latents[b].unsqueeze(0)
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# Find the first occurrence of the "calm" token and trim the codes to that.
ctokens = 0
for k in range(codes.shape[-1]):
if codes[0, k] == calm_token:
ctokens += 1
else:
ctokens = 0
if ctokens > breathing_room: # 8 tokens gives the diffusion model some "breathing room" to terminate speech.
latents = latents[:, :k]
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break
mel = do_spectrogram_diffusion(self.diffusion, diffuser, latents, diffusion_conditioning,
temperature=diffusion_temperature, desc="Transforming autoregressive outputs into audio..", sampler=diffusion_sampler,
input_sample_rate=self.input_sample_rate, output_sample_rate=self.output_sample_rate)
wav = self.vocoder.inference(mel)
wav_candidates.append(wav)
if not self.preloaded_tensors:
self.diffusion = migrate_to_device( self.diffusion, 'cpu' )
self.vocoder = migrate_to_device( self.vocoder, 'cpu' )
def potentially_redact(clip, text):
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if self.enable_redaction:
t = clip.squeeze(1)
t = migrate_to_device( t, 'cpu' if get_device_name() == "dml" else self.device)
return self.aligner.redact(t, text, self.output_sample_rate).unsqueeze(1)
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return clip
wav_candidates = [potentially_redact(wav_candidate, text) for wav_candidate in wav_candidates]
if len(wav_candidates) > 1:
res = wav_candidates
else:
res = wav_candidates[0]
do_gc()
if return_deterministic_state:
return res, (deterministic_seed, text, voice_samples, conditioning_latents)
else:
return res
def deterministic_state(self, seed=None):
"""
Sets the random seeds that tortoise uses to the current time() and returns that seed so results can be
reproduced.
"""
seed = int(time()) if seed is None else seed
torch.manual_seed(seed)
random.seed(seed)
# Can't currently set this because of CUBLAS. TODO: potentially enable it if necessary.
# torch.use_deterministic_algorithms(True)
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return seed