Sound driver improvements

Corrected info on zComRange+16h (it isn't unused)

Removed zFirstSound
- The entire equate is a mistake. The 1Fh is part of an 'and' to clear
all *flags* in the zMasterPlaylist value, it's not simply a cap.

Equated all zComRange+whatever values

Corrected some typos

Changed cfUnknown1 to cfSetCommunication

Corrected zComRange+14h (it's the speed shoes flag, not a tempo)