Metering audio playback across the Bass/Treble Spectrum

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spadict
Member

After crushing my way through n8burba's cocos2d cookbook, I've been playing around with the CDAudioManager a bit, playing different songs and trying to make sprites move to the beat. However, CDAudoManager seems to only be able to monitor across the decibel levels which frequently means the sprite responds to the melody rather than the rhythm.

Is there any cocos2d related solution to metering across Bass/Treble instead so that I might be able to roughly isolate instruments better within the music?
If no, does anyone have any other recommendations, or good reading sources to recommend?

Posted 1 year ago #
itlgames
Key Master

No, there is not a cocos2d solution, what you need to use is called FFT (Fast Fourier Transform) to get the audio spectrum, basically you get samples of the audio and get the list of frequencies.

There are few open source solutions, I have used this on the past (OouraFFT):

http://github.com/alexbw/iPhoneFFT

But there is also a native solution on iOS 4 (never tried) called Accelerate framework or something. And seems to be faster, so probably better stick with that.

Posted 1 year ago #
spadict
Member

Awesome, thanks so much for the insight Jose!

Posted 1 year ago #

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