Audiobus: Use your music apps together.
What is Audiobus? — Audiobus is an award-winning music app for iPhone and iPad which lets you use your other music apps together. Chain effects on your favourite synth, run the output of apps or Audio Units into an app like GarageBand or Loopy, or select a different audio interface output for each app. Route MIDI between apps — drive a synth from a MIDI sequencer, or add an arpeggiator to your MIDI keyboard — or sync with your external MIDI gear. And control your entire setup from a MIDI controller.Download on the App Store
Audiobus is the app that makes the rest of your setup better.
Getting velocity (variation) from midi generators
I like to compose aleatorically* with random seeds being generated from various and multiple midi plugins. Most of them have no way to self generate velocity so the output tends to be bang, bang, bang with all the notes the same intensity.
I have a work around that doesn't involve drawing the curves in manually after the fact in a midi editor/recorder.
Midi gen —> to AudioVeek's MidiTool Curve
Curve —> Instrument
In the Instrument's channel (AUM) in the effects slot place Mani Consulting's Velocity Filter
Route Curve —> Velocity Filter (Doug's video here **)
Step ? Profit. Have fun.
Velocity Filter: https://apps.apple.com/us/app/velocity-filter/id1473094671
Midi Tools: https://apps.apple.com/us/app/midi-tools/id1446209019?ls=1
*music (also aleatory music or chance music; from the Latin word alea, meaning "dice") is music in which some element of the composition is left to chance, and/or some primary element of a composed work's realization is left to the determination of its performer(s)