[Konami Krazy Racers] changes sample rate from mode 0 to mode 3

[ITotalJustice]

similar to #62

for the intro, it sets the sample rate very high, but not audio is actually played. then it drops to mode0, then switches from to mode2, back to mode0 and then alternates between mode0 and mode1 during the actual racing.

for hq audio i guess i should always sample at the highest sample rate, maybe make that an option in the frontend.