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.
Distinguishing singing sample from musical instrument tone sample
I make free music games. One that I'm currently developing and is near beta is about singing accurately. From a short sample of singing a note at a known frequency, I'd like to be able to tell whether someone is actually singing or whether they are playing an instrument instead.
It has occurred to me that perhaps the stability of the frequency might be a clue, though singers and instrumentalists might each have vibrato. There are probably other ways to address the problem. Typically I might have 1/3 second to analyze, but I could have several samples available if that helped.