In the PWM audio we output, instead of each group of 512 bits consisting
of a run of ones followed by a run of zeroes, now each group of 32 bits
consists of a run of ones followed by a run of zeroes. This gets rid of
noise that was previously present.
Doing this for every group of 8 bits instead makes the Game Boy Player
Start-Up Disc not start correctly for some reason. Game Boy Interface
works fine, though.
I also made us not discard the bottom 7 bits of each PCM sample.
According to Extrems, a real GBA doesn't actually output that many bits,
but doing it in this way makes the code simpler anyway.
JosJuice
ef997d0d82