# Optimal setDSPBufferSize parameters for PSVita

**URL:** <https://qa.fmod.com/t/optimal-setdspbuffersize-parameters-for-psvita/12675>\
**Category:** FMOD Studio\
**Created:** [August 31, 2016, 9:34am UTC](https://qa.fmod.com/t/optimal-setdspbuffersize-parameters-for-psvita/12675 "2016-08-31T09:34:08Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Dismiss](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/dismiss/32/1137_2.png) [@Dismiss](https://qa.fmod.com/u/Dismiss)\
**Post date:** [August 31, 2016, 9:34am UTC](https://qa.fmod.com/t/optimal-setdspbuffersize-parameters-for-psvita/12675/1 "2016-08-31T09:34:08Z")

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I’m hearing some crackle when playing ordinary one-shot sound effects like a button press. I have experimented with setDSPBufferSize to different values and can certainly make the crackling -worse- doing this, but… what -should- they be?

My situation:  
Running on PSVita - fmod studio - 1.06.17  
All my source assets are 44.1 khz  
For the vita build target they are all FADPCM @ 22.1 khz  
Frame rate varies between 10-60 (but the intention is that it will be 30, and it is 30+ in the specific situation im testing) (this also corresponds to the frequency that ‘fmod update’ will be called).

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**Author:** ![Dismiss](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/dismiss/32/1137_2.png) [@Dismiss](https://qa.fmod.com/u/Dismiss)\
**Post date:** [August 31, 2016, 4:03pm UTC](https://qa.fmod.com/t/optimal-setdspbuffersize-parameters-for-psvita/12675/2 "2016-08-31T16:03:38Z")

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> [@](#):
>
> I’m hearing some crackle when playing ordinary one-shot sound effects like a button press. I have experimented with setDSPBufferSize to different values and can certainly make the crackling -worse- doing this, but… what -should- they be?
> 
> My situation:  
> Running on PSVita - fmod studio - 1.06.17  
> All my source assets are 44.1 khz  
> For the vita build target they are all FADPCM @ 22.1 khz  
> Frame rate varies between 10-60 (but the intention is that it will be 30, and it is 30+ in the specific situation im testing) (this also corresponds to the frequency that ‘fmod update’ will be called).

News update:

I set up the simplest test case possible.

The only thing loaded is the master bank and one other bank that contains a couple non-streaming sounds. I press a button, it plays one sound. Nothing else is going on. It is running flat out at 60 fps, with a timer verifying that \< 20 ms is elapsing between fmod update calls.

Yet I am hearing some poping sounds at random points through the duration of the sound effect (~50% of the time it sounds normal) (the poping seems to be more frequent towards the middle/end of the sound, might not ever actually occur right at the beginning, but i can’t really say definitively).

Any ideas what this could be? Or how do I diagnose? Because I’ve tried twiddling every fmod parameter i could find with no effect other than sometimes making it pop more. So I think i’ve exhausted my ability to find this through trial and error.

I also tried changing the compression type and bit rate on the bank and rebuilding it, also to no audible effect.

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**Author:** ![mathew](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/mathew/32/431_2.png) [@mathew](https://qa.fmod.com/u/mathew)\
**Post date:** [September 8, 2016, 5:27am UTC](https://qa.fmod.com/t/optimal-setdspbuffersize-parameters-for-psvita/12675/3 "2016-09-08T05:27:20Z")

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_See below answer_ Any luck playing the event in our examples? If you still have trouble please contact [support@fmod.com](mailto:support@fmod.com).

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<div class="post-metadata">

**Author:** ![Dismiss](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/dismiss/32/1137_2.png) [@Dismiss](https://qa.fmod.com/u/Dismiss)\
**Post date:** [September 8, 2016, 4:53pm UTC](https://qa.fmod.com/t/optimal-setdspbuffersize-parameters-for-psvita/12675/4 "2016-09-08T16:53:22Z")

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I found that the particular devkit I was testing on was the problem - running on a different device, a testkit, the audio sounded fine.

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**Author:** ![mathew](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/mathew/32/431_2.png) [@mathew](https://qa.fmod.com/u/mathew)\
**Post date:** [September 1, 2016, 5:03am UTC](https://qa.fmod.com/t/optimal-setdspbuffersize-parameters-for-psvita/12675/5 "2016-09-01T05:03:20Z")

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The optimal DSP buffer size for PS Vita is 4 buffers of 512 samples, this is the default.

**EDIT:**  
Issue resolved, suspected faulty devkit.