In the attachment, you can find two different MIDI files, one of which exhibits the problem, the other of which does not.
To reproduce, extract and rename "dethtoll_broken.mid" to "dethtoll.mid", set your output to OPL Emulator, set the music volume to 50%, and launch a usermap. The music will play at full volume.
Then go into the volume settings and shift the volume slider up. Instead of increasing, the volume will decrease and correct itself temporarily. It will reset to full volume every time playback restarts.
This problem does not occur with Windows MME, and it also does not occur with the included "dethtoll_correct.midi" file.
This also prominently occurs with Nuclear Winter's MIDI music, so I suspect it's some peculiarity with these specific files that causes this.
Edit: Okay, this happens on every loop of the midi, which is rather annoying for short tracks.
Attached File(s)
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dethtoll.zip (4.98K)
Number of downloads: 234