I love using sunvox on my computer to sequence pixi tracker (regular and 1bit) on my iOS devices. Some more MIDI functionality would be even better. This way I can spend more time watching the pixel movies while jamming!
If each of these was on a separate MIDI channel:
-Channel mute mode where MIDI notes turn channels on and off
-Voice switch mode selects a different voice.
-Pattern switch mode where you can use MIDI notes to change where you are in the time line.
-Step record and skip MIDI commands.
PS. The chord mode is really cool, but it took me using MIDI input to figure that you can select multiple notes to enter at once.