jeffvautin/MTAudioProcessingTapBiquadFilterDemo
Demo iOS app that uses the MTAudioProcessingTap (audioTapProcessor) property on AVPlayer to filter audio in the iPod Music Library. The demo filter is a lowpass filter, but it's instantiated as a generic biquad and implemented using the Accelerate framework.
GitHub repository with 5 stars and 2 forks.
Language: Objective-C