Sets the sample playback frequency scale. Some systems have software or hardware limitations that might cap the final frequency value. E.g: Android's lowest value allowed is 0.5f (sample playback lasts twice as long) and the highest value is 2.0f (playback is twice as short).
void onSceneCreated()
{
LoadSoundEffect("soundfx/explosion.mp3");
}
void boom()
{
// randomly varies frequency to avoid too repetitive sounds
SetSampleSpeed("soundfx/explosion.mp3", randF(0.8f, 1.2f));
PlaySample("soundfx/explosion.mp3");
}