Separate Dialogue, Music, and Sound Effects in ComfyUI

Description and use

This workflow uses ComfyUI-DBS to separate dialogue, music, and sound effects from a video, keeping music and SFX while extracting dialogue as a separate track.

Problem

A video arrives with a single mixed soundtrack; muting removes all audio, but the goal is to replace only the dialogue while preserving music and sound effects.

Outcome

The workflow successfully separates dialogue from music and SFX, allowing the user to replace or remove dialogue while keeping the original background audio intact.

Workflow

• Load Video → Get Video Components (extract frames, frame rate, audio)
• DBS Loader → DBS Separate (split audio into music, SFX, speech)
• Merge Audio (set to add) to combine music and SFX
• Create Video → Save Video (write video with combined soundtrack)
• Save separate dialogue track as FLAC

Evidence

I built ComfyUI-DBS to bring that separation into a ComfyUI workflow. It splits a soundtrack into music, sound effects, and speech, then lets you save the parts or combine them again.

Source

The workflow performs these steps: Load Video → Get Video Components, DBS Loader → DBS Separate, Merge Audio, Create Video → Save Video, and a separate audio output saves the dialogue as FLAC.

Source

It runs locally on a CPU or NVIDIA CUDA GPU. The two available models total about 23 MB to download.

Source

For dialogue removal, the workflow adds music + SFX and uses that as the video's new soundtrack.

Source

The verification report records: Six CPU comparison cases: the pack's raw output matched the official package byte for byte.

Source