An app designed for Audiobus 3 that can also be used stand-alone with a cool built-in FM synth and sound space surface controller.
MIDI files can contain multiple tracks and channels, which can be selectively turned on/off. Sliders control tempo and pitch (can be transposed +/- 6 semi-tones).
Optimized for Audiobus 3.
https://intelligentgadgets.us/doc/MIDIplay.mp4