• Silero Models
  • Speech-To-Text
    • Dependencies
    • PyTorch
    • ONNX
    • TensorFlow
  • Text-To-Speech
    • Dependencies
    • PyTorch
  • FAQ
    • Wiki
    • Performance and Quality
    • Adding new Languages
  • Contact
    • Get in Touch
    • Commercial Inquiries

Silero Models

Silero Models: pre-trained enterprise-grade STT models and benchmarks. Enterprise-grade STT made refreshingly simple (seriously, see benchmarks). We provide quality comparable to Google's STT (and sometimes even better) and we are not Google.

As a bonus:

• No Kaldi;
• No compilation;
• No 20-step instructions;

Speech-To-Text

All of the provided models are listed in the models.yml file. Any meta-data and newer versions will be added there.

Currently we provide the following checkpoints:

	PyTorch	ONNX	TensorFlow	Quantization	Quality	Colab
English (en_v2)	✔️	✔️	✔️	⌛	link
German (de_v1)	✔️	✔️	✔️	⌛	link
Spanish (es_v1)	✔️	✔️	✔️	⌛	link
Ukrainian (ua_v3)	✔️	✔️	⌛	✔️	N/A

Dependencies

• All examples:
  • torch (used to clone the repo in tf and onnx examples)
  • torchaudio
  • soundfile
  • omegaconf
• Additional for ONNX examples:
  • onnx
  • onnxruntime
• Additional for TensorFlow examples:
  • tensorflow
  • tensorflow_hub

Please see the provided Colab for details for each example below.

PyTorch

import torch
import zipfile
import torchaudio
from glob import glob

device = torch.device('cpu')  # gpu also works, but our models are fast enough for CPU
model, decoder, utils = torch.hub.load(repo_or_dir='snakers4/silero-models',
                                       model='silero_stt',
                                       language='en', # also available 'de', 'es'
                                       device=device)
(read_batch, split_into_batches,
 read_audio, prepare_model_input) = utils  # see function signature for details

# download a single file, any format compatible with TorchAudio (soundfile backend)
torch.hub.download_url_to_file('https://opus-codec.org/static/examples/samples/speech_orig.wav',
                               dst ='speech_orig.wav', progress=True)
test_files = glob('speech_orig.wav') 
batches = split_into_batches(test_files, batch_size=10)
input = prepare_model_input(read_batch(batches[0]),
                            device=device)

output = model(input)
for example in output:
    print(decoder(example.cpu()))

ONNX

You can run our model everywhere, where you can import the ONNX model or run ONNX runtime.

import onnx
import torch
import onnxruntime
from omegaconf import OmegaConf

language = 'en' # also available 'de', 'es'

# load provided utils
_, decoder, utils = torch.hub.load(repo_or_dir='snakers4/silero-models', model='silero_stt', language=language)
(read_batch, split_into_batches,
 read_audio, prepare_model_input) = utils

# see available models
torch.hub.download_url_to_file('https://raw.githubusercontent.com/snakers4/silero-models/master/models.yml', 'models.yml')
models = OmegaConf.load('models.yml')
available_languages = list(models.stt_models.keys())
assert language in available_languages

# load the actual ONNX model
torch.hub.download_url_to_file(models.stt_models.en.latest.onnx, 'model.onnx', progress=True)
onnx_model = onnx.load('model.onnx')
onnx.checker.check_model(onnx_model)
ort_session = onnxruntime.InferenceSession('model.onnx')

# download a single file, any format compatible with TorchAudio (soundfile backend)
torch.hub.download_url_to_file('https://opus-codec.org/static/examples/samples/speech_orig.wav', dst ='speech_orig.wav', progress=True)
test_files = ['speech_orig.wav']
batches = split_into_batches(test_files, batch_size=10)
input = prepare_model_input(read_batch(batches[0]))

# actual onnx inference and decoding
onnx_input = input.detach().cpu().numpy()
ort_inputs = {'input': onnx_input}
ort_outs = ort_session.run(None, ort_inputs)
decoded = decoder(torch.Tensor(ort_outs[0])[0])
print(decoded)

TensorFlow

SavedModel example

import os
import torch
import subprocess
import tensorflow as tf
import tensorflow_hub as tf_hub
from omegaconf import OmegaConf

language = 'en' # also available 'de', 'es'

# load provided utils using torch.hub for brevity
_, decoder, utils = torch.hub.load(repo_or_dir='snakers4/silero-models', model='silero_stt', language=language)
(read_batch, split_into_batches,
 read_audio, prepare_model_input) = utils

# see available models
torch.hub.download_url_to_file('https://raw.githubusercontent.com/snakers4/silero-models/master/models.yml', 'models.yml')
models = OmegaConf.load('models.yml')
available_languages = list(models.stt_models.keys())
assert language in available_languages

# load the actual tf model
torch.hub.download_url_to_file(models.stt_models.en.latest.tf, 'tf_model.tar.gz')
subprocess.run('rm -rf tf_model && mkdir tf_model && tar xzfv tf_model.tar.gz -C tf_model',  shell=True, check=True)
tf_model = tf.saved_model.load('tf_model')

# download a single file, any format compatible with TorchAudio (soundfile backend)
torch.hub.download_url_to_file('https://opus-codec.org/static/examples/samples/speech_orig.wav', dst ='speech_orig.wav', progress=True)
test_files = ['speech_orig.wav']
batches = split_into_batches(test_files, batch_size=10)
input = prepare_model_input(read_batch(batches[0]))

# tf inference
res = tf_model.signatures["serving_default"](tf.constant(input.numpy()))['output_0']
print(decoder(torch.Tensor(res.numpy())[0]))

Text-To-Speech

All of the provided models are listed in the models.yml file. Any meta-data and newer versions will be added there.

Currently we provide the following speakers:

Speaker	Stress	Language	SR	PyTorch	Colab
aidar_8khz	yes	ru	8000	✔️
baya_8khz	yes	ru	8000	✔️
ksenia_8khz	yes	ru	8000	✔️
irina_8khz	yes	ru	8000	✔️
natasha_8khz	yes	ru	8000	✔️
ruslan_8khz	yes	ru	8000	✔️
lj_8khz	no	en	8000	✔️
thorsten_8khz	no	de	8000	✔️
gilles_8khz	no	fr	8000	✔️
tux_8khz	no	es	8000	✔️
aidar_16khz	yes	ru	16000	✔️
baya_16khz	yes	ru	16000	✔️
ksenia_16khz	yes	ru	16000	✔️
irina_16khz	yes	ru	16000	✔️
natasha_16khz	yes	ru	16000	✔️
ruslan_16khz	yes	ru	16000	✔️
lj_16khz	no	en	16000	✔️
thorsten_16khz	no	de	16000	✔️
gilles_16khz	no	fr	16000	✔️
tux_16khz	no	es	16000	✔️

Dependencies

Basic dependencies (see colab):

• torch
• omegaconf
• torchaudio (required only because models are hosted together with STT, not required for work)

PyTorch

Coming soon

import torch

language = 'ru'
speaker = 'kseniya_16khz'
device = torch.device('cpu')
model, symbols, sample_rate, example_text, apply_tts = torch.hub.load(repo_or_dir='snakers4/silero-models',
                                                                      model='silero_tts',
                                                                      language=language,
                                                                      speaker=speaker)
model = model.to(device)  # gpu or cpu
audio = apply_tts(texts=[example_text],
                  model=model,
                  sample_rate=sample_rate,
                  symbols=symbols,
                  device=device)

FAQ

Wiki

Also check out our wiki.

Performance and Quality

Please refer to this wiki sections:

• Quality Benchmarks
• Performance Benchmarks

Adding new Languages

Please refer here.

Contact

Get in Touch

Try our models, create an issue, join our chat, email us, read our news.

Commercial Inquiries

Please see our wiki and tiers for relevant information and email us.