CVX-2 : covox adapter

Discussion about old sound cards, MIDI devices and sound related accessories.

Re: CVX-2 : covox adapter

Postby Scali » 2018-6-06 @ 09:31

cvx4fanboy wrote:Hello. I've got a CVX4 thing and cvxplay program. It does work and I can play sampleu.raw.
One thing I couldn't figure out yet is how to convert mp3 or wav to this covox raw format.
Could you please explain this to me?


You can use the free Audacity program for this: https://www.audacityteam.org/
Open your mp3 or WAV file, then use the Export function from the file menu. Export the audio as a mono 8-bit unsigned raw PCM file.
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Re: CVX-2 : covox adapter

Postby matze79 » 2018-6-10 @ 09:10

you can play mp3 directly on cvx4 without converter. (at least Pentium required..)

Requires CWSDPMI:
http://sandmann.dotster.com/cwsdpmi/
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Re: CVX-2 : covox adapter

Postby matze79 » 2018-9-25 @ 10:05

if you want you can add Support to your Covox for FTL Sound Adapter.

Just adding a Wire gives you Sound in Dungeon Master.
Gave me some headattache but now i found out how it works..

Wire from Pin 17 to Pin 12 on your Covox Clone

ftl_hack.jpg


And it works:
https://youtu.be/8-qID0qEmMs
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Re: CVX-2 : covox adapter

Postby shock__ » 2018-9-25 @ 10:40

Why would it? The FLT sound adapter is fully documented.
http://dmweb.free.fr/?q=node/1514 (schematic is kinda meh to read)
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Re: CVX-2 : covox adapter

Postby matze79 » 2018-9-25 @ 10:46

Uff did not read this :)
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Re: CVX-2 : covox adapter

Postby Benedikt » 2019-2-15 @ 10:14

Speaking of the FTL Sound Adapter...

That device uses a 25.5kΩ load resistor and I reckon the Speech Thing uses 25.5kΩ, as well. I'm therefore going to use 25.5kΩ for my own replicas (new thread).
MobyGamer's measurements strongly support this assumption:
MobyGamer wrote:Well, that was educational:

CVX-1 Prototype: 5.04 vDC
CVX-2 Prototype: 4.80 vDC
10-pin Covox: 1.024 vDC
11-pin Covox: 1.025 vDC

With an input voltage of 5.04V and a 25kΩ load we should get an output voltage of
5.04V * (1 / (1 / 100kΩ + 1 / 25kΩ)) / 100kΩ = 1.008V

That is -1.5625% away from the 10-pin Covox and -1.6585% away from the 11-pin Covox.

With 25.5kΩ, however, we get
5.04V * (1 / (1 / 100kΩ + 1 / 25.5kΩ)) / 100kΩ = 1.02406374502V

That is just 0.0062% away from the 10-pin Covox and -0.0913% away from the 11-pin Covox. I'd call that bang on.
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Re: CVX-2 : covox adapter

Postby matze79 » 2019-4-12 @ 08:53

i`m working on a combatibility list of covox software:
https://dosreloaded.de/forum/index.php/ ... /?pageNo=1

i test every piece by hand, so i`m 100% sure it works.
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Re: CVX-2 : covox adapter

Postby konc » 2019-4-12 @ 09:35

matze79 wrote:i`m working on a combatibility list of covox software:
https://dosreloaded.de/forum/index.php/ ... /?pageNo=1

i test every piece by hand, so i`m 100% sure it works.


That's great, I wish this forum wasn't in german :lol:
When you finish your project, could you also share the result here in vogons with a column on how to setup the application/game for covox?
eg Electro Man | setup option
Star control | cmd line param: /s:lpt<x>

Again, great idea
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Re: CVX-2 : covox adapter

Postby matze79 » 2019-4-12 @ 09:45

yeah thats the plan :)

but first i go straight trough mobygames list.
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