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.
Auria Pro tips and tricks
1) Be aware of your buffer size
Previously the buffer size was set to 4096 when mixing, which allowed for many plugins to run. With the addition of MIDI tracks the default buffer size has been reduced to 512 to allow for acceptable MIDI playback, so if you are using MIDI tracks you won't be able to run as many plugins as before.
However if you separate the recording phase from the mixing phase, and freeze the MIDI to audio (you can use the new "Bounce Track in Place" option in the Process menu) you can then increase the buffer size at the mix stage.
2) You can chain AUX effects with busses
If you have an empty track you can set it's input from any of the AUX channels (there are 6 of them now), and any effects you add on that track can be dialed in to all the other tracks via the AUX send.
The great thing about this is that you can for example EQ you reverb send separately from the main signal. If your reverb is too bright for example, simply put an EQ after it in the chain.
Just be aware of one potential catch: if you put an effect on the AUX send itself, that will be blended with any busses in parallel - so if you want the chain to be in series leave the AUX slot on the master strip empty, and use a channel with the AUX as an input.
This probably all sounds a bit confusing so I will upload some screenshots to explain.