ACE-Step: Open Source Music Generation Models by StepFun

ComfyUI Wiki

ACE-Step is an open-source music generation foundation model jointly developed by StepFun and ACE Studio, supporting music generation, editing, and audio synthesis.

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ACE-Step

AudioOpen SourceMusic Generation

Open-source music generation foundation model by StepFun and ACE Studio. Supports music generation, audio editing, vocal synthesis, accompaniment production, voice cloning, and style transfer. Apache-2.0 license with free commercial use.

GitHubComfy-Org
DeveloperStepFun & ACE Studio
Release Date2025-05
Architecture3.5B Diffusion Transformer
LicenseApache-2.0
TypeMusic generation & editing

Models

ModelDescriptionLicenseReleased
ACE-Step 1.5Base / Turbo / XL variants with Qwen text encodersApache-2.02026-02

Select a model above for curated weight downloads, tutorials, and related information.

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