I don't know if I'm about to say something tremendously stupid:
I think it won't change the sample bit rate. it should just play it "faster" (higher pitched??). I mean, the sample will still have whichever bits/seg of definition it had when it was recorded/programmed , I don't think one can really change that by changing the speed at which the processor operates, can we?
Am I answering myself too? xD (Same wave "definition", sliiiiiightly different pitch).
Now, please someone come and tell me I was, indeed, wrong.