Re: Q and D Stereo board?-- do-it-yourself TDX Stereo Board

[Rubywand <rubywand@swbell.net>]

Jeff Blakeney writes ...
> 
> On Fri, 21 Jan 2000 21:37:30 -0600, Rubywand <rubywand@swbell.net>
> wrote:
> 
> >     The signals needed for getting separate channels are at the J-25
> > connector located near the memory expansion slot. Using a multiplexer IC
> > you can de-multiplex the signals and get two channels of sound.
 ....
> 
> Actually, if you wanted, you could have it output to 8 channels but I
> don't know of any software that can take advantage of that capability.
 ....

     Me neither. In general, sending the sound through two channels works
best. Most home systems are set up for two channels; and, stereo, when
available, could be degraded by splitting the effect into extra speakers
which happen to be poorly placed. The same applies to non-stereo two-channel
game, etc. effects planned for one side or the other. 

     If sound boards offered four channels, there might be incentive to
develop 4-channel "surround effects" material. The sound card would need to
use an additional 'address' line from the J-25 connector, add another MPX
IC, and add a couple more OpAmp IC's for the two extra output channels.



Rubywand