cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   Steve Oldmeadow
   Administrator

   There is a bug in 4.3.x that will cause clicking sounds under the following circumstances:
   1) two or more sounds are being played back simultaneously
   2) one of the sounds has its pitch set to something other than 1.0.

   This is quite a common scenario for anybody doing musical type apps or looped engine noises.

   This is a bug in the OpenAL implementation from 4.3 onwards. The only solution appears to be to not alter the pitch of your sounds or use something other than OpenAL.

   I just wanted to give people a heads up because I know this will effect a lot of apps. Will keep you posted.

   https://devforums.apple.com/thread/72319?tstart=0

   Posted 1 year ago #
2. 

   Steve Oldmeadow
   Administrator

   I have a possible work around. Set the mixer rate to 22050 Hz and use 44100 Hz sound samples for the sounds that are pitch shifted. It is bs that this needs to be done but c'est la vie.

   You can set the mixer rate using this code, make sure it is before any access to the shared instance of whatever API you are using.
   

   [CDSoundEngine setMixerSampleRate:CD_SAMPLE_RATE_MID];

   Make sure you see this in the console:
   

   AudioStreamBasicDescription:  2 ch,  22050 Hz, 'lpcm' (0x00000C2C) 8.24-bit little-endian signed integer, deinterleaved

   Ignore the warning about mismatched mixer and sample rates.

   Posted 1 year ago #
3. 

   toadkick
   Member

   I was wondering why I was suddenly hearing all of the popping and hissing. This is really, really lame :( I'm shifting the pitch of nearly every sound used during gameplay (seriously, this is way common functionality for games, how could they let this happen?), and the reason they are all 22050 Hz to begin with is to save space :(

   Posted 1 year ago #

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