Are you sure you've got the MT32ROM? And are you also sure that you have selected it as the default MIDI device in your Windows Multimedia control panel?

I've got MT32_CONTROL.ROM and MT32_PCM.ROM. Is MT32ROM a third one I'm missing? If so..that may be the case. And I do have it selected it in the multimedia control panel.

For some strange reason though, it'll sound the same way no matter which is selected (either the MT-32 or my default one which is Microsoft GS Wavetable SW Synth). The only way to make it sound normal again is to uninstall the mt-32 from device manager.

Would you mind giving exact steps to reproduce the problem? Without any idea of what you're trying to play, and with what application, it's pretty hard to guess at what the problem is.

System specifications (CPU and RAM in particular) would also be useful.

The sound card you use is not important, though it may have an impact on performance.

If possible, please also give the MD5 hashes of the ROMs you're using.

The first thing I did was go through the add new hardware wizard (this is win2k sp4) and add the MT32 using the files included in munt (oemsetup.inf and mt32emu.dll) This added MT-32 in the sounds & multimedia applet. I switched it to that, and that's when midi files just started sounding weird. Is it possible some midis just weren't meant to be played with MT32 emulation, or should they all sound ok?

I'm using an Athlon 3500+ with 1GB ram.

Here is what md5 shows:

MT32_Control.ROM: 9513fec4f09a7d327748340ce3a2a59b
MT32_PCM.ROM: 89e42e386e82e0cacb4a2704a03706ca

MT-32 MIDI files are incompatible with General MIDI. You cannot play GM files on MT equipment and vice-versa.

Ok, I was unsure if that was the case or not. But games sound odd as well, even when the music is set to Roland MT-32. I'll have to locate some MT-32 midis and try them out.