I haven’t tried this in awhile but I think changing the time base does affect the whole track.

Consider experimenting with a couple of workarounds. Something like this:

You might generate a drum track, freeze it, then copy it to a Utility Track. Then change the drum time base to double time. Mute and unmute the drum track as needed with F5, and do audio editing on the unwanted parts of the Utility Track.


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