Volume Ducking addon for Blender VSE

Addon for the Blender VSE to easily perform volume ducking in a strip with respect to a channel.

Get the add-on here

Goto to edit > preferences > add-ons and load the ‘main.py’ file

Load all of your strips in such a way that your target audio strip and your masking/narration strips align on different channels.

Note down the source channel number – in this example, ‘3’.

Here, the background music to which ducking is to be applied – keep it selected.

Drag the right panel open or press ‘n’ to toggle it open. Open up the ‘Channel Volume’ tab

Set values as follows

Field
Source Channel	value to the channel noted down before (e.g., 3)
Fade Duration	to the frame count you want the transition to take (3 frames to fade in/out)
Faded Volume	to the volume the strip should be at when not ducked
Normal Volume	to the volume the strip should be at when ducked

Hit ‘Execute Ducking’ and you’re set !!