This is the shareware version of the MIDI BGM from level 1 of Descent (the MS-DOS videogame), played through the ADLMIDI VSTi using Nuked OPL3 1.8 emulation and virtually unlimited polyphony.
Music composer and producer (also known as R.a.M. Land), Descent videogame series lover, Pumo Mines mod Developer and Retrocomputing enthusiast.
