Re: Apple IIGS Stereo Sound Card - Interest?

[Drew <goggledrew@gmail.com>]

On 1 Nov, 10:04, nyder <nyder...@gmail.com> wrote:
> Sorry if this is easy found info, but can somone explain to us newbs
> what the benefits of this is?
>
> I know the GS can produce stereo sound, and I know it only has a mono
> output.
>
> Does alot of programs support stereo sound?
>
> And what exactly are you doing?  It's obvious it's more then making a
> secondary jack for stereo, and I'd like to know what exactly your
> doing, just for the learning factor.
>
> thanks

Hi,

Well what i am doing is nothing new and I am only putting something
together that other people have already worked on. The Apple IIGS
Hardware Reference book has a rough outline on what is required to
allow the IIGS to output Stereo sound and in 1992 Jeff Hurlburt
produced a circuit diagram of what would be required which you can see
in the A2 FAQ (http://home.swbell.net/rubywand/Csa2SOUND.html).

Polymorph used a quad amp rather than the two TL082 as you can see
from his website http://www.cirruscomms.com.au/~mike_stephens/apple2/TDX_Stereo_Card/index.html
and i am using the TL084NI in the card i am producing. This means the
board only requires two ICs the demultiplexer and the amps (within one
package).

If you read the FAQ that should outline what is actually going on.

Hope that makes it clearer :-) and there are plenty of games that
support stereo sound.

Drew