ZDoom

Download:
https://www.dropbox.com/s/r8kpdyin6n6yh ... 34.7z?dl=0

Here is how some of these MIDIs sound after i processed them in DAW a bit:
https://soundcloud.com/ax-trifonov/anni ... r-guardian
https://soundcloud.com/ax-trifonov/storm
https://soundcloud.com/ax-trifonov/slay ... chestra001
https://soundcloud.com/ax-trifonov/slayr-moon-turbo
(MIDIs themselves sound more "simple", because they are MIDIs)

Also this archive contains one NSF file (NES/Famicom chiptune) - you can use it in GZDoom wad. Preview:
https://soundcloud.com/ax-trifonov/nescatman

Gave one a demo and I gotta say. I think you are onto something. You should definitely keep at it.

Added my new music for ZX Spectrum's beeper. Uploaded by the same link.
preview: https://soundcloud.com/ax-trifonov/zx-squeaktrum-48k

These are all very nice

I divided midis into two folders: one with free songs (CC-BY) and one with songs for non-commercial uses only (covers or files containing pieces from songs made by other people). Uploaded by the same link.

New MIDI - Tokio Hotel metal cover: https://vk.com/doc19150046_610623861
Also added it to pack, uploaded at the same link (see first post).
This cover processed in LMMS: https://soundcloud.com/ax-trifonov/mons ... etal-cover

Added new song called play "o0l20aa>aa<aa>aa" (back-to-basics.fur). It's a music for good old PC Speaker. Also GZDoom-compatible version (conversion to Sega Genesis VGM file) included for those who want to make some kind of Yet Another Sky May Be wad.
Preview: https://vk.com/wall19150046_758 or https://zxart.ee/rus/avtory/a/ax34/play ... c-speaker/