While I think of it, let me pass along the right people to contact...
Hally/Lipson are considering a game based on the Hardware Jed designed for the
Driver project. In a traditional game set-up, I would expect that Hally/Lipson
would want the usual Audio - a 6502 running RPM to drive Yamaha/POKEY/T.I. 5220
speech. For Jed's reference, Pat has designed the Stand-alone (S.A.) Audio PCB
which will be used first in XYBOTS. It is envisoned as the standard audio base
for our games and Pat will continue to support it. It includes everything from
the 6502 to the TDA 2030 amps as well as a few other goodies. It talks to the
main game processor through a serial chip (SCOM) that Gary Stempler designed (
500-gate gate-array).  This is probably old news to most of you, but I don't
want to assume too much. 

Incidently, Brad Fuller has a mandate from Rains to find an alternative to the
expensive (~$30.00) and sole-sourced Yamaha chip set. The audio group and Pat 
are looking into sampled sound generated via a dedicated 68000 and a DAC.

One aspect of my mail message on the audio for PT-man was not clear.
Hally/Lipson are free to choose any audio system they feel is best for
the product including the TMS-320 based design used in Driver. The only
point I was trying to make is that IF Yamaha-based sounds are desired, then
the SA Audio PCB is the preferred implementation.