Hardcoding setSoftwareFormat/setDSPBufferSize safe?

FMOD Engine
1

Is it safe to hardcode the values for System::setDSPBufferSize and System::setSoftwareFormat?

mSystem->setDSPBufferSize(512, 4);
mSystem->setSoftwareFormat(44100, FMOD_SPEAKERMODE_DEFAULT, 0);

On my Android test devices it sets the frequency to around 22khz if I do not call setSoftwareFormat, which has too high a latency. The calls above work fine on the devices I’ve tried, but I noticed if I set the frequency to some strange values the audio doesn’t play. Is there a proper way to check what allowable values I can use in the above calls? Will the values I’ve chosen always work or does it depend on the device? (note I’ll be eventually porting it to iOS as well).

2

If you set the rate to something other than that of the hardware device (ie System::getDriverInfo) then the mixer will have to resample its output in some cases, and will incur 1 block’s worth of latency usually.

22khz by default is just to reduce CPU usage on low quality speakers, but you’re fine to increase it.