ACE-Step 1.5: Open Source Music Generation Model by StepFun
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ACE-Step 1.5 is the latest open-source music generation foundation model jointly developed by StepFun and ACE Studio, featuring Base, Turbo, and XL variants.
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ACE-Step 1.5
AudioOpen SourceMusic Generation1.5Latest open-source music generation foundation model by StepFun and ACE Studio. Features Base, Turbo (distilled), and XL variants with Qwen text encoders. Supports music generation, audio editing, vocal synthesis, accompaniment production, voice cloning, and style transfer. Apache-2.0 license with free commercial use.
| Developer | StepFun & ACE Studio |
| Release Date | 2026-02 |
| Architecture | Diffusion Transformer (Base / Turbo / XL) |
| License | Apache-2.0 |
| Type | Music generation & editing |
| Variants | Base, Turbo, XL Base (BF16), XL SFT, XL Turbo (BF16) |
| Text Encoders | Qwen 0.6B / 1.7B / 4B |
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