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.
The goal of this thread is not to bash apps with fiddly controls but to suggest tips/tricks that work around problems. Here's mine:
The tempo control in iWavestation is the fiddliest thing I've ever seen in iOS software. After cussing at that bugger one day, I found this workaround: turn on the MIDI sync and fire up any app that allows direct alpha numeric input of tempo. Much better!