[Openal] Sound artifacts/popping when repeatedly playing source

[Shane Vitarana]

Hi Dan-

I ended up creating a pool of sources, and playing one from the pool
each time.  Seems to work fine for now.  I never got to the bottom of
finding out why the clicking occurred only for one particular source.

Thanks!
Shane

On Fri, Sep 26, 2008 at 4:51 AM, Daniel PEACOCK
<dpeacock at creativelabs.com> wrote:
> 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>
>
>
> "Shane Vitarana" <shanev at gmail.com>
> Sent by: openal-bounces at opensource.creative.com
>
> 09/25/2008 10:37 PM
>
> To
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> cc
>
> Subject
> [Openal] Sound artifacts/popping when repeatedly playing source
> 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
>
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