Audio · Background Only

Roadmap / pending — Demucs accompaniment / instrumental stem. Pairs with Vocals Only; audio-bg/ reserved.

Audio · Background Only · screenshot coming soon

Intended purpose

Audio · Background Only extracts the non-vocal stem (instrumental, ambience) as COMFYTV_AUDIO. MV remix, keep BGM swap vocals, IA2V on rhythm only, etc.

⚠️ Current status: workflow slot only — workflows/audio-bg/ has no shipped JSON; Demucs backend pending. See roadmap.md.

When to use it (once shipped)

• Keep BGM, regenerate visuals (IA2V)
• Stylize instrumental in Audio Stage
• Branch with Vocals Only from same source

Planned design

• Stage + workflow + ▶ Run.
• kind='audio-bg', upstream video, no prompt.
• Planned Demucs AudioStemSeparate.

Types

Type	Notes
COMFYTV_VIDEO	Input
COMFYTV_AUDIO	Instrumental output

Parameters

workflow

workflows/audio-bg/

video

Source COMFYTV_VIDEO.

Outputs (when implemented)

Output	Type
audio	COMFYTV_AUDIO

Step by step (today)

1. Not available — use Demux · Audio Track for full mix.
2. Watch roadmap Demucs item.

Full guides (recommended reading)

This page covers one node only. For end-to-end workflows, multi-stage pipelines, type conversion, and design rationale, see the ComfyTV user guides on GitHub:

Guide	Contents
Getting started	Install, canvas basics, per-stage Run, snapshots, Project, Image Picker
Video and audio	Clip, crop, resize, extract frame, demux vs Generate video
Roadmap	Supported vs planned backends (video upscale, Demucs, etc.)

Repository and workflows

Resource	Link
GitHub repository	https://github.com/jtydhr88/ComfyTV
User guides index	https://github.com/jtydhr88/ComfyTV/tree/main/docs
Built-in workflows	https://github.com/jtydhr88/ComfyTV/tree/main/workflows
Model checklist	https://github.com/jtydhr88/ComfyTV/blob/main/docs/models.md
Custom workflows	https://github.com/jtydhr88/ComfyTV/blob/main/docs/custom-workflows.md

FAQ

Q: Run alongside Vocals Only?
A: Likely separate Runs on same source when shipped.

Q: Quality?
A: Demucs model + mix complexity.

Q: Remix today?
A: Demux full track only; AI stems pending.

Related nodes

• Vocals Only (pending)
• Demux · Audio Track (✅)
• Audio Stage