I’ve noticed that muting instrument tracks and IAA instrument tracks, only seems to mute the audio, while the instrument plays on in the background. I’m not sure this is the best choice on a resource challenged platform like the iPad.
Someone (like me) might very easily mute a bunch of tracks, believing they had just freed up resources, when in fact this is not the case.
Reproduce by adding a bunch of Nanologue tracks, punishing the CPU a bit. The mute all but one and watch as the CPU meter does not go down.