@f2hak: Things to check.

1) Did you wipe clean both /home/user/.d1x-rebirth/ AND /opt/d1x-rebirth/ before installing the package in extras-devel? If the dirs don't exist to begin with and it's your first time installing D1X than it's fine.

2) Did you put the 2 data files in EITHER /home/user/.d1x-rebirth/ or /opt/d1x-rebirth/ ?

3) Are they full retail (not shareware) Descent data files patched to at least ver 1.4a (last ver is 1.5 IINM)? I've done this because DXX and D2X-XL for my old Ubuntu needs this as well.

4) Are they properly named? Make sure they are in full lowercase (descent.pig and descent.hog).

And as for MIDI impact on performance, I'm clocking an average of 36-38 FPS with the cockpit on, 44-46 with it off. Running at normal stock clockspeed, also with 'presistant debris' in misc options enabled (levels filled with the floating parts of enemiy bots are great fun).

I'd say it's acceptable, besides the level 2-3 madness inducing music problem. Levels 1, 4 and 5 has beem fine so far, no timitidy craziness going on.

But the timidity rendering is good, if not great. The Oggs and my old Sound Blaster 16 on the first PC i played it on are trumped easily.