Audio Unit plug-ins Add built-in and custom Audio Unit plug-ins to an audio engine to process, generate, and play audio. TopicsAudio Unit setupCreating an Audio Unit extensionAVAudioUnitComponent managementAVAudioUnitComponentAVAudioUnitComponentManagerAudio effectsAVAudioUnitEQAVAudioUnitDistortionAVAudioUnitDelayAVAudioUnitReverbAVAudioUnitEffectTime effectsAVAudioUnitTimePitchAVAudioUnitVarispeedAVAudioUnitTimeEffectAudio generationAVAudioUnitGeneratorMIDI instrumentsAVAudioUnitMIDIInstrument See AlsoAudio Unit plug-ins and effectsCreating custom audio effects