// The default on windows in bufferlength = 1024 and numbuffers = 4
hr = g_pFmodSystem->setDSPBufferSize(1024, 4);
if (hr != FMOD_OK)
{
LogError("%s", FMOD_ErrorString(hr));
return false;
}
http://www.fmod.org/forum/viewtopic.php?t=13451
http://www.fmod.org/forum/viewtopic.php?f=7&t=16135