bezzam/VibeVoice-SemanticTokenizer

🚨 Note: This is a draft model card. Actual model links can be found in this collection.

VibeVoice-SemanticTokenizer

VibeVoice is a novel framework designed for generating expressive, long-form, multi-speaker conversational audio, such as podcasts, from text. It addresses significant challenges in traditional Text-to-Speech (TTS) systems, particularly in scalability, speaker consistency, and natural turn-taking.

A core innovation of VibeVoice is its use of continuous speech tokenizers (Acoustic and Semantic) operating at an ultra-low frame rate of 7.5 Hz. These tokenizers efficiently preserve audio fidelity while significantly boosting computational efficiency for processing long sequences. VibeVoice employs a next-token diffusion framework, leveraging a Large Language Model (LLM) to understand textual context and dialogue flow, and a diffusion head to generate high-fidelity acoustic details.

The model can synthesize speech up to 90 minutes long with up to 4 distinct speakers, surpassing the typical 1-2 speaker limits of many prior models.

➡️ Technical Report: VibeVoice Technical Report

➡️ Project Page: microsoft/VibeVoice

Models

🚨 Note: This is a draft model card. Actual model links can be found in this collection.

Model	Context Length	Generation Length	Weight
VibeVoice-1.5B	64K	~90 min	HF link
VibeVoice-7B	32K	~45 min	HF link
VibeVoice-AcousticTokenizer	-	-	HF link
VibeVoice-SemanticTokenizer	-	-	This model

Usage

Below is example usage to encode audio for extracting semantic features:

import torch
from transformers import AutoFeatureExtractor, VibeVoiceSemanticTokenizerModel
from transformers.audio_utils import load_audio_librosa


model_id = "bezzam/VibeVoice-SemanticTokenizer"
sampling_rate = 24000

# load audio
audio = load_audio_librosa(
    "https://hf.co/datasets/bezzam/vibevoice_samples/resolve/main/voices/en-Alice_woman.wav",
    sampling_rate=sampling_rate,
)

# load model
device = "cuda" if torch.cuda.is_available() else "cpu"
feature_extractor = AutoFeatureExtractor.from_pretrained(model_id)
model = VibeVoiceSemanticTokenizerModel.from_pretrained(
    model_id,
    device_map=device,
).eval()

# preprocess audio
inputs = feature_extractor(
    audio,
    sampling_rate=sampling_rate,
    padding=True,
    pad_to_multiple_of=3200,
    return_attention_mask=False,
    return_tensors="pt",
).to(device)
print("Input audio shape:", inputs.input_features.shape)
# Input audio shape: torch.Size([1, 1, 224000])

# encode
with torch.no_grad():
    encoded_outputs = model.encode(inputs.input_features)
print("Latent shape:", encoded_outputs.latents.shape)
# Latent shape: torch.Size([1, 70, 128])