full hardware implentation ?

i don't mind using a tool for switching modes, but a simple switch on the pcb would be ok too.

I'm partial to hardware switches.

Current proposal for the new revision:

Also decided that software switching may not be the smartest move, when one intents to use the covox/dss on a non-pc system or a system with a bad implementation of the LPT port.
Since the device has to be powered at all times, I might also add a small amp + potentiometer so one doesn't fully rely on active speakers (personally I packed mine away and stick with headphones these days). Alternatively I could also implement a "stereo-on-1" mode (using pin 1/14 for switching channels) even tho I haven't fully decided on the implementation yet ("dual mono" would most likely end up becoming a "mono on left" which is meh).

looks good, is this already tested ?

Yup ... tested with the board you sent me + a ton of wires 😉 Except for the LEDs ... but I don't see how I could fuck that up.
Layout itself is untested and may not be final (working on my project for the VCFB currently which has high priority). Also considering to add a switch for "dual mono" and "full stereo/mono on left" modes

What about adding a 7528 instead of a 24 ? allowing for stereo on 1 too 😀

That would be the idea if I can get the mono/stereo-mixing right.

I read through this thread and I'm glad to see more efforts to clone more gear at the hardware level versus software workarounds. Are there any games that actually use Stereo-on-2 for DSS/CST? Also, would this intermediary board/combined unit have any issues with the pin 12-to-17 mod for FTL Sound Adapter support?

You won`t need to solder the Bridge for FTL Sound Adapter, Dungeon Master supports DSS and Sound is exactly the same.

DSS/CST never supported stereo in the first place.
There's an option tho to output mono just on the left speaker/headphone or double the signal to both.
The true stereo functionality is limited to demos or various mod players.

About Pin 12-17 on the FLT board ... check the schematic ... haven't dug into this myself yet (ideally you'd connect a switch).

Out of curiosity, would this work with the CVX4? I'm assuming yes, but I don't really know enough to say for certain for myself.

It works on every Covox Speech Thing Clone.

i`m working on a list of covox compatible software, every piece is hand tested.
https://dosreloaded.de/forum/index.php/Thread … liste/?pageNo=1

maybe i will do a similar one with dss.

matze79 wrote:

It works on every Covox Speech Thing Clone. […]
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It works on every Covox Speech Thing Clone.

i`m working on a list of covox compatible software, every piece is hand tested.
https://dosreloaded.de/forum/index.php/Thread … liste/?pageNo=1

maybe i will do a similar one with dss.

Cool, thanks!

Does this thing work under win98?

only with Windows 3.x driver.

matze79 wrote:

...I also did a new PCB Design for DSS. But currently somehow busy..
Expect a Update in next months for a 50Hz Buzz Free DSS...

Did you ever do this, Matze? I'd be interested in seeing an updated PCB for the DSS alone. I'd like to be able to couple it to my SoundJr. (I wonder if the power for the LPT port could run both, or that's asking too much?)

Paralel wrote:

matze79 wrote:

...I also did a new PCB Design for DSS. But currently somehow busy..
Expect a Update in next months for a 50Hz Buzz Free DSS...

Did you ever do this, Matze? I'd be interested in seeing an updated PCB for the DSS alone. I'd like to be able to couple it to my SoundJr. (I wonder if the power for the LPT port could run both, or that's asking too much?)

On side 3 there's a schematic for the DSS only part without the DAC.

matze79 wrote:

only with Windows 3.x driver.

you mean installing win3x driver within win9x;
does this work with a covox too?

Yes but expect problems.
Eg. Freeze/Hangs.

Maybe the LPTDAC.386 Driver will work better ?

...I also did a new PCB Design for DSS. But currently somehow busy..
Expect a Update in next months for a 50Hz Buzz Free DSS...

yeah this is software based solution using a ATMega and PWM and later with SPI DAC.
Its not nearly finished only basic covox output is working and has problems at higher Khz speeds..
but my friend who is doing the programming stuff has no time currently to finish it and i`m not nearly as good to get it finished.

it would be better to switch to a small arm device which has already integrated DAC.

Maybe you know the Studio54 ?
http://www.8bity.cz/2014/postavte-si-pc-zvuko … ox-stereo-on-1/
Its fully Opendesign.

Sorry for necroposting here. Does anyone know how the full signal of the DSS actually works? As in, will it stay 'full'(the ACK line being set in this case) when the buffer is full and starts emptying until either a new sample is written or the buffer becomes empty? Otherwise, said signal wouldn't have much purpose, and software would not be able to use the full FIFO at all when sending multiple samples(as with only one sample processed(thus 15 left in the buffer) the rising of the ACK line would cause the IRQ to fire after the very first sample?

Anyone?