CODEWITHSUNDEEP
iphoneiosavaudioplayer
iC7Zi
iC7Zi

Reputation: 1658

AVAudioPlayer change sound tempo?

I am making a rhythm game. I need to play a sound with different tempo. In other words e.g. if I have [AVAudioPlayer play] 8 times in 2 seconds.

Upvotes: 0

Views: 1138

Answers (2)

Dave Norfleet
Dave Norfleet

Reputation: 409

Check out the 

enableRate

and 

rate

property on the AVAudioPlayer Class. After you create the audioplayer, but before you play, set

audioPlayer.enableRate=YES;

then after you play, set rate to a number above or below 1.0 to speed up or slow down the track. For music, less than 0.8 or more than 1.2 starts to sound bad, but for a few BMP up or down, it will easily do the trick.

Note that play sets the rate to 1 and stop sets the rate to 0, so be sure to set the desired rate after playing.

Upvotes: 3

iC7Zi
iC7Zi

Reputation: 1658

I've used Pitch Shifting using the Fourier Transform – Source Code

http://www.dspdimension.com/download/

Upvotes: 0

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