[Openal] Sound artifacts/popping when repeatedly playing source

[Daniel PEACOCK]

Hi Shane,

Stopping a source prematurely can cause clicks.   You could try setting the
gain to 0 before making the stop call (which might allow the implementation
to ramp the volume to silence over a short period of time), or you can try
ramping the volume yourself to silence before calling stop.

Dan
Creative Labs (UK) Ltd.

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             "Shane Vitarana"                                              
             <shanev at gmail.com                                             
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                                       [Openal] Sound artifacts/popping    
                                       when repeatedly playing source      
             09/25/2008 10:37                                              
             PM                                                            
                                                                           
                                                                           
                                                                           
                                                                           




I experience a clicking sound when repeatedly playing a source after
it has been played once.  It only seems to happen if it is played
before the previous play finishes.  However, I am making sure that the
source is stopped before playing it again.  I have multiple sources in
my app and this only happens for a certain low frequency source.  The
clicking sound is milder if I apply a compression filter to the audio,
although it doesn't entirely go away.

I have tried sampling at 44 kHz, 22 kHz, with 16-bit mono and stereo
channels, using linear PCM encoding.

Anyone experience anything like this? Are there any guidelines on how
sounds are best encoded for OpenAL playback?

Thanks,
Shane

--
iPhone Apps: http://crimsonjet.com
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