### LoadPresetDemo ###

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DESCRIPTION:

This app shows how to create an AUGraph object containing a Sampler unit, 

configure the Sampler by loading one of the two included AUPreset files, 

and then start the graph and trigger note-on and note-off events to 

audition the presets. The preset files were created in Mac OS X using the 

AU Lab application, found in /Developer/Applications/Audio.

To use this app, tap the Play Low, Play Mid, and Play High buttons (which 

constitute a rudimentary keyboard) to audition the current preset. You can 

play more than one note simultaneously. Tap the "Trombone" or the 

"Vibraphone" button to load the corresponding patch, which employs the 

like-named .aupreset file.

In addition to studying the source files to see how this app works, look at 

the connections established in the MainViewController nib file to see how

the play buttons communicate with the MainViewController object.

To learn how the preset files used in this sample code project were 

created using AU Lab in Mac OS X, view the Music in iOS and Lion 

presentation from WWDC 2011, and in particular the section on the Sampler 

audio unit. <https://developer.apple.com/videos/wwdc/2011/?id=411>

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BUILD REQUIREMENTS:

Mac OS X v10.7 or later; Xcode 4.2 or later

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RUNTIME REQUIREMENTS:

iOS v5.0 or later

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PACKAGING LIST:

Source Files:

main.m                          Main source file as generated by Xcode

LoadPresetDemoAppDelegate.h     The application delegate class used for installing the main view controller.

LoadPresetDemoAppDelegate.m     The application delegate class used for installing the main view controller.

MainViewController.h            The main view controller of this app.

MainViewController.m            The main view controller of this app. This file contains most of the app implementation.

Resource Files:

Trombone.aupreset               The AUPreset file for the Trombone patch.

Vibraphone.aupreset             The AUPreset file for the Vibraphone patch.

Sounds/Tbone/1a#.caf            Audio files used by the Trombone patch.

Sounds/Tbone/2a#.caf

Sounds/Tbone/3a#.caf

Sounds/Tbone/4g.caf

Sounds/Tbone/5e.caf

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CHANGES FROM PREVIOUS VERSIONS:

Version 1.0

- First version.

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Copyright (C) 2011 Apple Inc. All rights reserved.