### LoadPresetDemo ###
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>
Mac OS X v10.7 or later; Xcode 4.2 or later
iOS v5.0 or later
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.
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.
CHANGES FROM PREVIOUS VERSIONS:
- First version.
Copyright (C) 2011 Apple Inc. All rights reserved.