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 StoreAudiobus is the app that makes the rest of your setup better.
Regarding relative CC mapping
Hi everyone,
Do you know what type of incremental / decremental values Loopy Pro is expecting when mapping a relative encoder to a function ?
My goal is to adjust the tempo using a relative knob on my X-Touch mini, but, unfortunately, it gets stuck values. Therefore, I'll probably adapt the encoder using midifire / streambyter like I did with my MPK mini plus for Drambo.
For reference, I know Drambo allows to switch between :
+[65-127] -[63-0]
+[65-127] -[0-64]
+[0-63] -[65-127]
+[65-127] -[63-0]
Jog +[>64] -[<64]
It's my first post on this forum, but I've already found many answers here, so a big big thanks to all the contributors. 
Comments
for relative midi, a value from 65 to 127 is for decrement (127 being fine decrement and 65 coarse) and 1 to 63 for increment.
The closer the value is to 63, the coarser it is I believe.
You're entirely right, it works like a charm. Thank you very much !