To use the API nodes, you need to ensure that you are logged in properly and using a permitted network environment. Please refer to the API Nodes Overview section of the documentation to understand the specific requirements for using the API nodes.
Make sure your ComfyUI is updated.Workflows in this guide can be found in the Workflow Templates.
If you can’t find them in the template, your ComfyUI may be outdated.(Desktop version’s update will delay sometime)If nodes are missing when loading a workflow, possible reasons:
- You are not using the latest ComfyUI version(Nightly version)
- You are using Stable or Desktop version (Latest changes may not be included)
- Some nodes failed to import at startup
Text-to-Audio Workflow
For text-to-audio, you can generate audio through text prompts. You need to describe the music you want to generate.Download JSON Workflow

- Modify the text prompt. You should use keywords to describe the music you want to generate.
- (Optional) Modify the
duration
parameter. It’s190
by default. - Click the
Run
button or use the shortcutCtrl(cmd) + Enter
to execute the audio generation. The audio will be saved to theComfyUI/output/audio
directory.
Audio-to-Audio Workflow
Audio-to-audio is basically music re-sampling. You can use it to generate new music from a given piece of music, or you can just hum a melody, and then the model will generate new music based on the input audio.Download JSON Workflow
Download Input Audio

- In this workflow, we have provided two nodes for you to input the audio(at least 6 seconds) you want to edit:
- 1.1
Record Audio
node: You can use it to record any of your music ideas, such as a hummed melody. It should be at least 6 seconds. - 1.2
LoadAudio
node: You can use it to upload audio that you want to be used in this workflow.
- 1.1
- Modify the text prompt. You should use keywords to describe the music you want to generate.
- The
strength
parameter is used to control the difference from the original audio. The lower the value, the more similar the generated audio will be to the original audio. - Click the
Run
button or use the shortcutCtrl(cmd) + Enter
to execute the audio generation. The audio will be saved to theComfyUI/output/audio
directory.
Audio Inpainting Workflow
Audio inpainting is used to complete or extend existing tracks. You can use it to complete the missing part of music or extend the music to a longer duration. You need to set where you want to start and end the inpainting.Download JSON Workflow
Download Input Audio

- Upload audio to the
LoadAudio
node. - Modify the text prompt. You should use keywords to describe the music you want to generate.
- (Optional) Modify the
duration
parameter. It’s190
by default. - (Important) Modify the
mask_start
andmask_end
parameters. You need to set where you want to start and end the inpainting. - Click the
Run
button or use the shortcutCtrl(cmd) + Enter
to execute the audio generation. The audio will be saved to theComfyUI/output/audio
directory.