I would bet that cable is a dud . Most of the gameportMIDI cables on Ebay are out of spec (connected straight through) and will either not work or work marginally . New old stock cables covered in molded plastic have a better chance of being actually usable . See this thread : "Quality" gameport to midi cable availability and testing

Your best bet for a newly made working gameport MIDI adapter is, IMHO, this :

https://www.serdashop.com/DB15MIDI

EDIT: Do not forget to get a DIN MIDI cable if you need one .

Thanks for the Hint. It really was the cable. I orderd the DB15MIDI Adapter and it worked instantly, after setting SET MIDI=SYNTH:1 MAP:E to SET MIDI=SYNTH:2 MAP:E.
But it only works with the front MIDI Port, the Port in the Back MIDI 1 doesn't work.

Could it be muted or disabled ? I couldn't find anything related in the menu. Also I did resets of all modes, but no change.

Osmodia wrote on 2020-11-05, 16:30:

Thanks for the Hint. It really was the cable. I orderd the DB15MIDI Adapter and it worked instantly, after setting SET MIDI=SYNTH:1 MAP:E to SET MIDI=SYNTH:2 MAP:E.
But it only works with the front MIDI Port, the Port in the Back MIDI 1 doesn't work.

Could it be muted or disabled ? I couldn't find anything related in the menu. Also I did resets of all modes, but no change.

There should be an option that switches the port from the front to the back.

yawetaG wrote on 2020-11-05, 20:05:

Osmodia wrote on 2020-11-05, 16:30:

Thanks for the Hint. It really was the cable. I orderd the DB15MIDI Adapter and it worked instantly, after setting SET MIDI=SYNTH:1 MAP:E to SET MIDI=SYNTH:2 MAP:E.
But it only works with the front MIDI Port, the Port in the Back MIDI 1 doesn't work.

Could it be muted or disabled ? I couldn't find anything related in the menu. Also I did resets of all modes, but no change.

There should be an option that switches the port from the front to the back.

I hope there is one, but I couldn't find something related in the manual to rearranging the ports.

See p70 of manual "Using MIDI IN1 and IN2" in the About MIDI section for scenarios where switching the MIDI IN ports can come into play.

With that said, this does not apply if you're just using your SC-55 to play game music with a Gameport-MIDI cable. In this scenario MIDI IN1 & IN2 should function the same way, and you can use either one. (The only difference between them is that IN1 also transmits on the THRU port while IN2 doesn't).

Update:
MIDI 1 was not disabled via Menu, It was a faulty photocoupler near MIDI 1.
It measured zero resistance between Anode-Cathode and vice versa.
Replaced it with a PC-410L photocoupler from Aliexpress, and it works like a charm. The original PC-410 is very hard to find and equivalent spare parts are also very rare.
This one has a lower Output Current, but still works great.

Thanks for your help.

Hi all, I facing problem when I hookup the midi cable for SC-88 to sound blaster card (SB16, awe64) .. when I launch the game or do configure the game in MS-DOS system will hang or stuck. but inside Windows no issues at all. but if I change sound card to other 1868 and ymf719 there just working fine without any issues.

Tested will 4 different sound blaster card all have same issue for me. the problem is when I use external SC-88, but if I just use wavetable card there also No problem.

Don't know anyone got facing this type of problems before?

peter.ng wrote on 2020-12-06, 09:22:

Hi all, I facing problem when I hookup the midi cable for SC-88 to sound blaster card (SB16, awe64) .. when I launch the game or […]
Show full quote

Hi all, I facing problem when I hookup the midi cable for SC-88 to sound blaster card (SB16, awe64) .. when I launch the game or do configure the game in MS-DOS system will hang or stuck. but inside Windows no issues at all. but if I change sound card to other 1868 and ymf719 there just working fine without any issues.

Tested will 4 different sound blaster card all have same issue for me. the problem is when I use external SC-88, but if I just use wavetable card there also No problem.

Don't know anyone got facing this type of problems before?

It's better to start a separate new thread for these kind of questions instead of hijacking an existing one.

It's very unlikely it's the SC-88, but more likely the cable is faulty.

darry wrote on 2020-10-31, 15:47:

I would bet that cable is a dud . Most of the gameportMIDI cables on Ebay are out of spec (connected straight through) and will […]
Show full quote

I would bet that cable is a dud . Most of the gameportMIDI cables on Ebay are out of spec (connected straight through) and will either not work or work marginally . New old stock cables covered in molded plastic have a better chance of being actually usable . See this thread : "Quality" gameport to midi cable availability and testing

Your best bet for a newly made working gameport MIDI adapter is, IMHO, this :

https://www.serdashop.com/DB15MIDI

EDIT: Do not forget to get a DIN MIDI cable if you need one .

I also have this direct wired gameport midi cable without any electronics in between. On my 486 with awe64, with a connected cable, I can play music from the sc-55 ST while playing games. But when I start the Cakewalk program I can't hear any sounds when I connect a keyboard controller to the second MIDI cable. Would the device help?

GuillermoXT wrote on 2022-09-17, 18:01:

darry wrote on 2020-10-31, 15:47:

I would bet that cable is a dud . Most of the gameportMIDI cables on Ebay are out of spec (connected straight through) and will […]
Show full quote

I would bet that cable is a dud . Most of the gameportMIDI cables on Ebay are out of spec (connected straight through) and will either not work or work marginally . New old stock cables covered in molded plastic have a better chance of being actually usable . See this thread : "Quality" gameport to midi cable availability and testing

Your best bet for a newly made working gameport MIDI adapter is, IMHO, this :

https://www.serdashop.com/DB15MIDI

EDIT: Do not forget to get a DIN MIDI cable if you need one .

I also have this direct wired gameport midi cable without any electronics in between. On my 486 with awe64, with a connected cable, I can play music from the sc-55 ST while playing games. But when I start the Cakewalk program I can't hear any sounds when I connect a keyboard controller to the second MIDI cable. Would the device help?

Hard to say. I've had varying luck with cable. I had one with the through port so I could hook up another joystick and the joystick would never work.