Audio Track is correct and testing muting UtilityTracks work fine on my system.

It's not mentioned but in addition to the Mute command using Bar Settings (F5), the user must also set the Chorus, beginning bar (Mute) and ending bar (Return to Normal).

In the attached screen shot, the Mute for Track Utility #1 is set to begin on Bar 2 and Return to Normal at Bar 4 as indicated by the red Underlines at the respective bars.

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BIAB 2025:RB 2025, Latest builds: Dell Optiplex 7040 Desktop; Windows-10-64 bit, Intel Core i7-6700 3.4GHz CPU and 16 GB Ram Memory.