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.
Interesting comment from Geo Synth's developer asking for something familiar... over a year ago!
This is from the comments underneath Smite Matter's review of Geo Synth, which bemoaned the lack of Audio Copy/Paste in the app. The dev responded, and part of what he said was this:
"It's really ridiculous that every app is supposed to be a controller, a synth, and a little mini track-recorder at the same time. While everybody is busy making a controller-synth-daw full of visual doodads, they are doing stuff that's so wrong that it doesn't actually matter that it works at all because it ends up being unplayable anyway: We got apps that think that a 1024 buffer size is reasonable (holy moly! 23ms buffer and jitter!). Almost every keyboard has keys smaller than fingertips, and either lock you into a scale so that you can't play accidentals, or give you no real octave range, or weak touch handling with respect to note overlaps, and the continued attempt to make keyboards fit onto iPads and iPhones. So given my limited development time, I focused on what I think matters, and just ignore what everybody else is doing better than I can do anyway.So my take on this is to get the controller right. In the future, I want to make a pure controller because it's a waste of resources for every app to be a controller-synth-daw when they can communicate. The sharing of audio resources is a problem too because of all things running in the background you end up with the latency of the worst app. Ideally, ONE app is rendering sound, ONE app is recording, and ONE app is controlling in the foreground, with possibly multiple apps doing some automatic beat-synced stuff in the background (drums, arps).The messaging for correct fretless-capable MIDI is far and away complicated enough to keep me occupied. This controller has replaced my guitars and basses and I have been eating my own dogfood since Mugician. So I picked my battles, and shipped because I have been working on this app for a very very long time – Pythagoras started in January (it became Geo), and will fall apart from inconsistency if it continues to evolve without the restraint of real-world feedback. Geo Synthesizer was created to be the antithesis of a classic techno-synth. It was designed for a genre akin to microtonal Black Metal, for playing Arabic scale tunings; for playing fast, etc. I got a day job, and I have no interest in trying to compete with something that's classical or ordinary anyways. I can deal with complaints that it doesn't have every feature or that it's strange. It's a reflection of my personal values in what matters, which may differ from a lot of other people.:-) So, there's why. I promised Jordan that 1.1 would have ACP, or we would have something better than ACP. I do dislike it though, and think that supporting ACP only prolongs the length of time until a proper solution becomes common."
I WONDER WHICH RECENTLY RELEASED APP DOES EXACTLY WHAT HE ASKED!
Anyone know what the dev is up to now? Geo Synth is still on version 1.0!
Here's the review and comments in full: http://smitematter.com/2011/10/31/geosynth-app-review/