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About ACE-Step 1.5 in ComfyUI

ACE-Step 1.5 is a major update to the open-source music generation model, now natively supported in ComfyUI. It brings commercial-grade quality to your local machine with a novel hybrid architecture where a Language Model acts as an omni-capable planner, transforming simple user queries into comprehensive song blueprints. ACE-Step 1.5 Model highlights:
  • Commercial-grade quality: Achieves quality beyond most commercial music models, scoring 4.72 on musical coherence
  • Blazing fast generation: Generate a full 4-minute song in ~1 second on RTX 5090, or under 10 seconds on RTX 3090 with ComfyUI
  • 50+ language support: Strong support for English, Chinese, Japanese, Korean, Spanish, German, French, Portuguese, Italian, and Russian
  • LoRA fine-tuning: Supports lightweight personalization through LoRA training in ComfyUI
Make sure your ComfyUI is updated.Workflows in this guide can be found in the Workflow Templates. If you canโ€™t find them in the template, your ComfyUI may be outdated.If nodes are missing when loading a workflow, possible reasons:
  1. You are not using the latest ComfyUI version (Nightly version)
  2. Some nodes failed to import at startup
The AIO version packages all models into a single checkpoint file, making it easier to download and manage.

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ACE-Step 1.5 Music Generation AIO

Input style tags and lyrics to generate a full song. The workflow uses the ACE-Step 1.5 model to produce commercial-grade music in under 10 seconds on consumer hardware.

Run on Comfy Cloud

Open in Comfy Cloud

Download Workflow

Download JSON or search โ€œACE-Step 1.5 Music Generation AIOโ€ in Template Library

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AIO Model Download

ace_step_1.5_turbo_aio.safetensors

All-in-one checkpoint file (recommended for most users).
AIO Model Storage Location

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Option 2: Split Model Files

The split version allows you to download individual model components separately.

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ACE-Step 1.5 Music Generation Workflow

Input a text prompt describing the music style and optional lyrics. Generate a full, high-quality audio song in under 10 seconds on consumer hardware.

Run on Comfy Cloud

Open in Comfy Cloud

Download Workflow

Download JSON or search โ€œACE-Step 1.5 Music Generation Workflowโ€ in Template Library

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Split Model Downloads

acestep_v1.5_turbo.safetensors

Diffusion model.

qwen_0.6b_ace15.safetensors

Text encoder (0.6B).

qwen_1.7b_ace15.safetensors

Text encoder (1.7B).

ace_1.5_vae.safetensors

VAE model.
Split Models Storage Location

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ACE-Step 1.5 Key Features in ComfyUI

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Chain-of-Thought Planning

The ACE-Step 1.5 model synthesizes metadata, lyrics, and captions via Chain-of-Thought reasoning to guide the diffusion process, resulting in more coherent long-form compositions.

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Hybrid LM + DiT Architecture

ACE-Step 1.5 combines a Language Model that plans the song structure with a Diffusion Transformer (DiT) that handles audio synthesis, all running natively in ComfyUI.

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Coming Soon to ComfyUI

These features are available in ACE-Step 1.5 but not yet supported in ComfyUI:
  • Cover: Give the model any song as input along with a new prompt and lyrics, and it will reimagine the track in a completely different style
  • Repaint: Select a segment, regenerate just that section, and the model stitches it back in while keeping everything else untouched