How to achieve Equilizer Setting for iPhone in Audio Player

Question

How can i set the bass, or other kind of Equalizer programatically for my iphone app? Are there ready frameworks or methods available?? Kindly please provide a reference..

Answer 1

If you are using audio queues or remoteIO audio units for audio, you can write and use your own DSP filters to process and equalize your audio sample arrays or buffers. Cascaded or parallel banks of IIR filters are one possibility. FFT overlap add/save filtering is another possible DSP technique that will allow a custom equalization curve.