### Inter-App Audio Suite ###

Inter-App Audio Suite comprises three samples illustrating different aspects of inter-app audio.

Reference:

    • "What's New in Core Audio for iOS" - https://developer.apple.com/wwdc/videos/#602

### InterAppAudioHost ###

InterAppAudioHost allows iOS audio applications that are remote instruments, effects or generators to publish an output which can be used by other audio applications. These applications which publish an output are known as nodes. Any application which connects and utilizes these node applications is a host. This is an example of a host application.

This example is intended to be used with the node examples InterAppAudioDelay and InterAppAudioSampler.

Demo Application Notes

  • In the interest of simplicity, removing the effect node also removes the instrument node. A well-behaved host application should add the necessary code to make these two

    independent

  • The transport code shows an example of how a transport mechanism may be implemented. Applications are free to implement more advanced functionality and alternate appearances

    that go better with the user interface of the specific application

  • When connecting a remote generator node instead of an instrument, playing notes on the keyboard will have no effect as the remote node does not listen to MIDI events

  • Playing the keyboard on the host will sound different than playing the keyboard from the node. This is because the host's keyboard is several octaves lower than the start note on the node. This was intentional to demonstrate the differences between triggering a note via MIDI from the host vs. directly triggering the note from the node.

### InterAppAudioDelay ###

Inter-app-audio allows applications to publish themselves so that they can be used in conjunction with other audio applications.

This example illustrates how to publish and control a delay effect, which can be used by another application.

Demo Application Notes

    • Parameters for and names delay are based on actual parameters of AUDelay Audio Unit with linear slider response. In the interest of simplicity,

      making custom logarithmic sliders is not shown.

    • Transport controls are shown in this demo to illustrate how to create and control a remote transport. In the context of this demo suite, that functionality

      is not practically useful.

### InterAppAudioSample ###

This app is an example of a node application that is a sampler. This demo shows a sampler that publishes itself as a remote instrument that plays audio upon receiving midi events from a host application.

It also includes a keyboard for triggering notes locally.

===========================================================================

Copyright (C) 2013-2014 Apple Inc. All rights reserved.