Hi,

If you are using the Video Recorder module, make sure you set as many Audio Tracks as the number of the last connected Audio input pin of the Video Recorder module:

If you are using the [Common_Studio]:Compounds\Record\Record_3-Audio.xcomp compound, then you don't need to make such a setting:

Also, make sure your video recording is receiving audio. You can peek at audio connections to see if there is any change in the volume of the audio: https://aximmetry.com/learn/broadcast-production-workflow/preparation-of-the-production-environment-phase-i/scripting-in-aximmetry/flow-editor/pin/#peeking 

Warmest regards,