VOGONS


First post, by Peter.Mengel

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Hi iam using this through my gameport on a SB16 CT CT2770 which has no Wavetable port. I dont get any sound out? Tried the E-Wave and the XM2GS.
The Adapter has a 12vdc included so it should even work on original older wavetable boards...but no sound! Gameport is working as i can get my mt32 pi working on
it without any problem. i tried SoftMPU but no luck either. Any clues?

Thank you.

Reply 2 of 12, by Peter.Mengel

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Pierre32 wrote on 2022-07-20, 02:50:

What do your jumpers & SET BLASTER look like, and are your games also pointing to the MPU address set there (probably 330)?

No jumper changed on the card and yeah 330 is right. Checked them all are closed, i own a 2770 sb16 and a sb 16 value...the value is shorter.
SET BLASTER=A220 I5 D1 H5 P330 T6

Reply 3 of 12, by dionb

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If the MT32pi works, we can safely assume MIDI commands are going through the port. So that's not the problem.

Which version of the Chill & Phil is it? If it's the IV a bit of a no-brainer, but are you sure you're hooking audio up to the line-out, not line-in?

Otherwise, break out the multimeter and check voltage pins on the header. 5, 9 and 13 should be giving +5VDC. If they don't nothing will work. 17 should do +12VDC, 19 -12VDC. The E-Wave shouldn't need them, but worth checking anyway.

Reply 4 of 12, by Peter.Mengel

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dionb wrote on 2022-07-20, 07:39:

If the MT32pi works, we can safely assume MIDI commands are going through the port. So that's not the problem.

Which version of the Chill & Phil is it? If it's the IV a bit of a no-brainer, but are you sure you're hooking audio up to the line-out, not line-in?

Otherwise, break out the multimeter and check voltage pins on the header. 5, 9 and 13 should be giving +5VDC. If they don't nothing will work. 17 should do +12VDC, 19 -12VDC. The E-Wave shouldn't need them, but worth checking anyway.

4 and 8 +5v,
5 and 9 +5v,
12 and 15 +3v

Meassure was done on the chill and phil dapater connected

12v dc has given out 11.2v

Was wondering cause as of wiki 12 and 15 should have +5v too
https://en.wikipedia.org/wiki/Game_port

But maybe 5+5+3=12? For the 12v converter?

Reply 5 of 12, by dionb

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Peter.Mengel wrote on 2022-07-20, 17:46:
4 and 8 +5v, 5 and 9 +5v, 12 and 15 +3v […]
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dionb wrote on 2022-07-20, 07:39:

If the MT32pi works, we can safely assume MIDI commands are going through the port. So that's not the problem.

Which version of the Chill & Phil is it? If it's the IV a bit of a no-brainer, but are you sure you're hooking audio up to the line-out, not line-in?

Otherwise, break out the multimeter and check voltage pins on the header. 5, 9 and 13 should be giving +5VDC. If they don't nothing will work. 17 should do +12VDC, 19 -12VDC. The E-Wave shouldn't need them, but worth checking anyway.

4 and 8 +5v,
5 and 9 +5v,
12 and 15 +3v

Meassure was done on the chill and phil dapater connected

12v dc has given out 11.2v

Was wondering cause as of wiki 12 and 15 should have +5v too
https://en.wikipedia.org/wiki/Game_port

But maybe 5+5+3=12? For the 12v converter?

That's the gameport, which is known-good. I was referring to measuring the wavetable header on the Chill and Phil...

Reply 6 of 12, by Peter.Mengel

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dionb wrote on 2022-07-20, 18:05:
Peter.Mengel wrote on 2022-07-20, 17:46:
4 and 8 +5v, 5 and 9 +5v, 12 and 15 +3v […]
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dionb wrote on 2022-07-20, 07:39:

If the MT32pi works, we can safely assume MIDI commands are going through the port. So that's not the problem.

Which version of the Chill & Phil is it? If it's the IV a bit of a no-brainer, but are you sure you're hooking audio up to the line-out, not line-in?

Otherwise, break out the multimeter and check voltage pins on the header. 5, 9 and 13 should be giving +5VDC. If they don't nothing will work. 17 should do +12VDC, 19 -12VDC. The E-Wave shouldn't need them, but worth checking anyway.

4 and 8 +5v,
5 and 9 +5v,
12 and 15 +3v

Meassure was done on the chill and phil dapater connected

12v dc has given out 11.2v

Was wondering cause as of wiki 12 and 15 should have +5v too
https://en.wikipedia.org/wiki/Game_port

But maybe 5+5+3=12? For the 12v converter?

That's the gameport, which is known-good. I was referring to measuring the wavetable header on the Chill and Phil...

I see, well mistunderstanding! Sorry. So how do i meassure and what exactly? The Wavetableheader on t he Chill and Phil from Up, left to right?
That should fit right?

waveblaster_pin_layout.png?type=w2

And its this one just with the 12v added
And yes ive going output to sb16 input..Input is on and recives sound from the mt32 pi as example.
1504406801.jpg

Reply 7 of 12, by Peter.Mengel

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5,9,13 = 1,9v
17+21 = 9,25v

took another multimeter

5,9,13 = 2,13 v
17+21 = 11,02v

Funny so it seems gameport gives out right voltage and the Adapter somehow halfs it...hmm i dont get the problem to be honest.

Could it be a that 12 and 15 give out only 3v? The Jumper is set to Medi and Joystick=? Maybe One or the Other? Cause as far i know Joystick are 3V right?

Reply 8 of 12, by dionb

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If the 5V line is only giving 2V, that explains why you're not getting any sound...

12 and 15 are suspicious though - on a legacy joystick-only port, they are GND and +5V, but on a dual-use port like this they are MIDI IN and OUT. In MIDI mode there shouldn't be any voltage on them unless MIDI is actively being transmitted. If there's +3V on both it sounds like something's wrong - but then the MT32Pi wouldn't work either.

Reply 9 of 12, by Peter.Mengel

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dionb wrote on 2022-07-20, 20:28:

If the 5V line is only giving 2V, that explains why you're not getting any sound...

12 and 15 are suspicious though - on a legacy joystick-only port, they are GND and +5V, but on a dual-use port like this they are MIDI IN and OUT. In MIDI mode there shouldn't be any voltage on them unless MIDI is actively being transmitted. If there's +3V on both it sounds like something's wrong - but then the MT32Pi wouldn't work either.

Well found the problem, 4 and 8, 4 and 9 only give out 2.13V on Gameport. And the Adapter only uses 4 and not 5 as Ground so i need a workaround...Still no clue why the Soundcard does this. Its a CT 2770 Value.

Couldnt i well solder 4 and 5 together? As both are Ground? it should work? Maybe a fuse between for safety?

Reply 10 of 12, by mkarcher

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Peter.Mengel wrote on 2022-07-20, 22:22:

Couldnt i well solder 4 and 5 together? As both are Ground? it should work? Maybe a fuse between for safety?

The sound card should connect both 4 and 5 to ground. If they are not both ground, the design or your product is broken. So adding a connection (for example by soldering) is the correct fix.

Reply 11 of 12, by dreamblaster

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Yes it is not problem to connect pin 4 and 5, that should help

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Reply 12 of 12, by Peter.Mengel

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dreamblaster wrote on 2022-07-21, 18:53:

Yes it is not problem to connect pin 4 and 5, that should help

Yeah its not the fault of the adapter at all! It was my gameport slot...took another sb16, glad i own like 20 of them....and it worked like a charm. Thanks for all the Support and Help via PM
Youre a great guy!

And just a idea! Maybe in the next redesign you could add a switch for 4/5 Grnd and 8/9 +5v? Iam sure more faulty sb16 exist and so its more furture proof xD.