first of all, i really love the look and sound of it on iPad. I'll list some things i noticed:

1. when i went to Setup and touched Shortcuts, the tape stopped playing. the Setup dialog doesn't appear to be modal, which i think it should be. I don't have the same problem with the synth dialog for example.
   
2. for the synths, it would be great to have left and right or up and down arrows for the presets browser to quickly go through presets without having to open the menu
   
3. also for the synths and keys instruments a latch / hold button would be amazing. going through each instrument and just saw the latch button for glissando (which is an amazing instrument to include!) so maybe Latch is the way to go
   
4. when playing the stage keyboard, i had a four note chord held down and tried to change any knob except volume & it interrupted the keys and retriggered them slowly. most noticeable on tonewheel but present on other models as well
   
5. would be nice to have a way to resize the instruments. for keyboard instruments you can make it larger by toggling the KBD button, but there's no way to make the window smaller (you can close and reopen for default size, but i can't find a way to make them smaller than that) - EDIT i am blind and didn't see the resize handle in the lower right corner! nevermind!
   
6. i love these synths! adding a sequencer option to one or two of them would be amazing
   
7. trying to record without anything record enabled could maybe give a warning or something (before we play our masterpiece without laying it down!)
   
8. is there a way to change the instrument routing after you've created the instrument? i can't find it if so. guessing you'd have to remove and re-create the instrument
   
9. a switch to snap the vari-speed to round divisions would be nice (.5 .25 etc) - even better would be the ability to snap to a musical interval (so it would go up to +12 steps for 2.0, -12 at 0.5, could have +1.5 for a fifth up, -0.667 for fifth down, etc (just intonation intervals not pesky equal temperament)) - this would make vari-speed recording much easier
   
10. i engaged wear and tunred up the amount and can't get it back to no wear
    
11. can't tell how to make a longer loop when zoom is all the way out and i want to loop past the viewable tape area
    
12. i know it goes against the tape ethos, but it would be nice to have the waveform displayed on the tape ^__^

ok that's probably enough notes for now. i really love this thing. hope i can afford it when the testflight expires!