Imported MIDIs have no percussion

[Xarbaros]

Hi,
I am trying to use LMMS to retouch and modernize old videogame soundtracks in MIDI format. However, after importing the files, I notice that they have lost their percussion channel. Aside from that, sometimes the parameters are a bit off (e.g. all instruments being panned to the left, automatic volume and dynamic adjustments not happening, instruments sounding muffled). I figured it might be the old and not always professionally composed files' fault, however both MPC-HC and Synthesia seem to have no problem playing them. I did read something about converting between different MIDI formats, however as far as I understand it, that would not really work for tracks with multiple instruments.
I am using version 1.1.3 of LMMS on Windows 7 with a slightly modified version of the General User Soft Synth soundfont (using the original made no significant difference). For reference, here is one of the MIDIs I would like to work with.
Thanks in advance!

[Jernemies]

Yeah, it's a little bit iffy.
For percussion, look for a off-key oddly rhythmic (usually piano, bank 0 instrument 0) track in there, and change the bank-value of it to 128 to magically make the percussion appear. Whatever comes to any missing tracks, lack of automation, or a weird MIDI-format (like Hell Revealed 2 doom mod stuff, where I suspect there is automating of instruments in place), I'm afraid all you can do is roll up your sleeves and do stuff yourself. I don't think that's a huge problem in your case if covering that stuff is what you wanted to do in the first place, but it's not exactly ideal.

[Xarbaros]

Yeah, the automation acting up is not too big of a deal, just figured I'd mention it.
It would be nice if it were that easy to fix, but sadly, there is no percussionist disguised as a piano. As far as I can tell (which should be rather well concerning how often I heard this BGM while playing), all tracks are more or less where they belong.

[Jernemies]

So I looked into the midi (weird that I didn't already). The good news, I found where the drum channel is supposed to be, it's bank 0 instrument 16 (organ). Bad news, it's empty. Go figure.
A possible workaround is taking any kind of MIDI editor and resaving the file. I can't remember what else you had to do to make magic happen in situations like this, maybe a format change? Whatever, I feel like that is your best bet. That, or rewriting the frums from scratch
You could maybe try to talk to the devs about it, but I wouldn't expect to see change any time soon, considering things

[musikbear]

Percussion is crappy in midi.
The problem is as already mentioned, that the midi format has all percussion in only one track! So bottom line: Midi-track percussion sucks!
The only really working solution is to make proper percussion in the b&B-editor, and work through that, until you are satisfied. It is way to frustrating trying to 'extract' anything from the midi-track, especially because the precision in the midi percussion is low grained, and you will be facing 1001 node adjustments
If you still like to use midi-percussions, both the zasfx preset 'Drums', and the SF2 GeneralUser will 'work', but imo not work well..