EPSSampler is a wrapper around
AUSampler functionality, based on Apple’s Sampler Unit Presets sample code.
- iOS 5.0 or later
CoreAudioto your project’s linked libraries.
EPSSampler.mto your project.
aupreset file in AU Lab and add it to your project. (See Session 411 from WWDC 2011 for more details.) Add all the sound files needed by the preset to a folder named
Sounds in your project. Create an instance of
EPSSampler with the preset file:
NSURL *presetURL = [[NSBundle mainBundle] URLForResource:@"Preset" withExtension:@"aupreset"]; EPSSampler *sampler = [[EPSSampler alloc] initWithPresetURL:presetURL];
To play and stop notes, use these methods:
- (void)startPlayingNote:(UInt32)note withVelocity:(double)velocity
note parameters should be the MIDI index of the note you want to start/stop. The
velocity parameter should be a value between
AU Lab is no longer included with Xcode. It can be downloaded by choosing Xcode->Open Developer Tools->More Developer Tools… in Xcode, and then choosing Audio Tools for Xcode. There isn’t much document on
AUSampler—watch Session 411 from WWDC 2011, and read Technical Note TN2283 for more information.