For what reason do you want to mute certain MIDI channels?

In any case, there is no provision for muting channels in DOSBox; however, there are external tools like MIDI-OX on Windows that will do what you want, as well as many other kinds of MIDI manipulations.

ripsaw8080 wrote on 2021-06-22, 16:19:

For what reason do you want to mute certain MIDI channels?

In any case, there is no provision for muting channels in DOSBox; however, there are external tools like MIDI-OX on Windows that will do what you want, as well as many other kinds of MIDI manipulations.

My overall intention was to record midi channels individually while running a particular game in DOSBOX.
To start off, I was using "AdLib Music Synthesizer Card or 100% compatible" driver setting from a Sound Configuration Utility program (under DOSBOX)
Since I didn't know if it was possible to mute midi tracks under the dosbox.config, I searched for soundfonts online but I could not replicate the sounds produced by the Adlib Music Synth card driver....and here I am.

If it's true that it's not possible to mute certain MIDI channels under DOSBOX.config, it is unfortunate and thanks for letting me know. I appreciate it.

Regarding external tools, since you've listed one, I'll give it a try, but I feel like I'll lose the Adlib sound 'font' that DOSBOX plays.

Thanks again!

The AdLib music in DOSBox is not MIDI; it is an emulation of OPL chips.

DOSBox does not have a provision to mute channels or instruments of OPL music, but it can capture port writes to the OPL chip in the DRO format with the Ctrl-Alt-F7 key combo. With the DRO file you may find external player or editor programs that allow muting or other changes. FYI, there are tools to convert DRO to VGM, if you're more familiar with the latter format.

ripsaw8080 wrote on 2021-06-22, 18:12:

The AdLib music in DOSBox is not MIDI; it is an emulation of OPL chips.

DOSBox does not have a provision to mute channels or instruments of OPL music, but it can capture port writes to the OPL chip in the DRO format with the Ctrl-Alt-F7 key combo. With the DRO file you may find external player or editor programs that allow muting or other changes. FYI, there are tools to convert DRO to VGM, if you're more familiar with the latter format.

I was not aware of that but thanks for correcting me.

I have an update to report: I first want to thank you for guiding me into the right direction.
I wasn't aware of the .DRO file nor external players being able to mute tracks, but I have proceeded with this direction.

I was able to grab a copy of "imfplay" and used the .DRO files DOSBOX generated. This allowed me to not only mute channels but it plays back exactly as how I hear through the adlib driver!

I am successful in completing this original task thanks to your help!