brettp11 wrote on 2020-07-31, 22:52:

Hello all! […]
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Hello all!

You guys have been awesome so far. I need help setting up my Roland MPU-401 and MT-32. I’m using a Low-Tech MIF IPC RevB interface card to connect to my retro 486 DOS PC.

I’m trying to test the hardware to make sure everything works. The MT-32 passes its “test mode” but when I hook the MPU-401 and try to play a MIDI file through DOS (GSPLAY.EXE or PLAYMID.EXE) I get no sound at all. Nothing comes out the speaker.

Can someone help me?!

Does the MT-32's display react when playing a MIDI file ?

I assume that you either have an MT-32 with headphone jack and are using the said jack or have connected the line-level 1/4″ TS connectors on the back to an amplifier with speakers connected (or amplified speakers) .

EDIT: If no reaction on MT-32's screen, it might seem pretty obvious, but could you have accidentally swapped MIDI in and out connectors ?

darry wrote on 2020-07-31, 23:18:

Does the MT-32's display react when playing a MIDI file ? […]
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brettp11 wrote on 2020-07-31, 22:52:

Hello all! […]
Show full quote

Hello all!

You guys have been awesome so far. I need help setting up my Roland MPU-401 and MT-32. I’m using a Low-Tech MIF IPC RevB interface card to connect to my retro 486 DOS PC.

I’m trying to test the hardware to make sure everything works. The MT-32 passes its “test mode” but when I hook the MPU-401 and try to play a MIDI file through DOS (GSPLAY.EXE or PLAYMID.EXE) I get no sound at all. Nothing comes out the speaker.

Can someone help me?!

Does the MT-32's display react when playing a MIDI file ?

I assume that you either have an MT-32 with headphone jack and are using the said jack or have connected the line-level 1/4″ TS connectors on the back to an amplifier with speakers connected (or amplified speakers) .

EDIT: If no reaction on MT-32's screen, it might seem pretty obvious, but could you have accidentally swapped MIDI in and out connectors ?

Yes. Here are the pictures. I have the output going to a Roland MA-12 speaker.

Nothing on the MT-32 screen. It seems like GSPLAY.EXE knows there is a MPU-401 connected because it will play a file. If i disconnect the cable, it will not play the file.

Update: Space Quest 3 works fine. The DOS midi players have no sound output. Strange!