dnelson@ibiza.cs.miami.edu (Dru Nelson) (08/13/89)
Simply, what method does the Paula chip use to compine sound channels 0 and 1? Does it just add and divide by 2 to average the two channels? Also, how did they fit those D/A converters into one chip? Most D/A converter chips are quite large, and yes, the Paula is quite big too. Still, do the leave some of the process to be finished by some external circuitry? %%%%%%%%%%%%%%% Internet: dnelson@ibiza.cs.miami.edu %%%%%%%%%%%%%%%%%%%%%%%% % Dru Nelson %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Miami, FL % os9, C, Progressive music (burrow owls to dial-a-cliche), chAos %%%%%%%%%%%%%%% and frying my mind & spirit? on certain questions about life %
grr@cbmvax.UUCP (George Robbins) (08/13/89)
In article <630@umigw.MIAMI.EDU> dnelson@ibiza.cs.miami.edu (Dru Nelson) writes: > > Simply, what method does the Paula chip use to compine sound channels > 0 and 1? Does it just add and divide by 2 to average the two channels? It is done pretty much analog style, by tieing the outputs of two D/A sections to the same pin. > Also, how did they fit those D/A converters into one chip? Most D/A > converter chips are quite large, and yes, the Paula is quite big too. > Still, do the leave some of the process to be finished by some external > circuitry? Limiting the resolution to 8-bits makes things relatively easy. Each added bit doubles you problems... The only external processing is a current-> voltage conversion and filtering. -- George Robbins - now working for, uucp: {uunet|pyramid|rutgers}!cbmvax!grr but no way officially representing arpa: cbmvax!grr@uunet.uu.net Commodore, Engineering Department fone: 215-431-9255 (only by moonlite)