VoxCPM: continuous speech generation from ModelBest and Tsinghua

Strengths worth exploring

Different references for different goals

Version 2 can clone from a reference clip alone, or use a reference plus an accurate transcript for audio-continuation-style cloning that carries more of the original rhythm and style.

Voice design creates a voice from text alone. Controllable cloning adds performance direction while retaining a reference speaker.

Pin the checkpoint and use its sample rate

VoxCPM-0.5B, VoxCPM1.5, and VoxCPM2 differ in output rates, languages, and controls. Set the checkpoint explicitly and write audio with model.tts_model.sample_rate rather than a rate copied from an older example.

Usage and deployment

1. Prepare supported Python, PyTorch, and compute. The official quick start offers pip installation and documents device-specific requirements.
2. Install voxcpm and explicitly load openbmb/VoxCPM2. The minimal example below synthesizes text; choose openbmb/VoxCPM1.5 and its matching API for a 1.5 workflow.
3. Validate local short-text generation before starting the official WebUI or following the documented streaming, batch, and serving options.

python -m venv .venv
source .venv/bin/activate
pip install voxcpm

import soundfile as sf
from voxcpm import VoxCPM

model = VoxCPM.from_pretrained("openbmb/VoxCPM2", load_denoiser=False)
wav = model.generate(text="Hello, welcome to the voice model library.")
sf.write("output.wav", wav, model.tts_model.sample_rate)

Before you get started

• 44.1 kHz and 48 kHz describe sample rates, not guaranteed fidelity with poor references or unsuitable content.
• Version 2's multilingual, voice-design, and controllable-cloning features should not be listed as version 1.5 capabilities.

Where it fits

Useful for developers exploring detailed speech, contextual delivery, and self-hosting while choosing clearly between bilingual and newer multilingual releases.

Official resources and sources

1. OpenBMB/VoxCPM · READMEhttps://github.com/OpenBMB/VoxCPM
2. VoxCPM · Technical paperhttps://arxiv.org/abs/2509.24650
3. VoxCPM 1.5 · Version guidehttps://voxcpm.readthedocs.io/en/latest/models/voxcpm1.5.html
4. VoxCPM · Quick starthttps://voxcpm.readthedocs.io/en/latest/quickstart.html
5. VoxCPM2 · Technical reporthttps://arxiv.org/abs/2606.06928