Finally getting some time to play with the loop functionality (Probably my biggest want out of the app).
Like others, I am still struggling with the loop creation/definition piece. I can get acceptable loops on my Mac, but have not had good success on the iOS platforms. I am worried I will spend more time fine tuning these than I can afford. @peter you challenged "How to make this less complex?" Before ST3 I used Apple's MainStage for my backing track rig. (Glad to have a mobile option now) It was very easy to loop (Apple calls it "cycle") sections on the fly. I believe this is because of 2 things.
1) The use of a .caf file format allowed for markers from Logic to be embedded and used as sections when playing back. They where visionally displayed as part of the timeline. (No need to have an editor to create a loop region)
2) Simple transport controls (buttons) to enable/disable looping (Cycle) between the markers. When enabled, playhead would cycle back to previous marker when it hit the next marker (includes auto crossfade). Disable, the playhead would continue as normal. Nothing fancy. It also included next marker and previous marker buttons for those that like to jump around.
My use case is very simple, ability to toggle an intro or solo section to repeat on the fly and then continue when ready. I will do this almost 100% from a pedal control. Having a bigger indicator on the screen confirming I have engage the loop functional would be helpful. (I like having that as a transport button)
Not sure how viable the .caf file format is to work with, but maybe something to look into. Apple dev documentation here. https://developer.apple.com/library/archive/documentation/MusicAudio/Reference/CAFSpec/CAF_overview/CAF_overview.html
I have also included a couple screen shots of MainStage and the transport/cycle information.
I love the app and it has been a game changer for me. I recommend it to all my musician friends as the backing track app to use.
Thanks for all of your hard work Peter! I hope my comments help.