Unbelievable 3Disk #C64 #Megademo by Arise: "E2IRA". Also unreal #SIDmusic by Jammer. Yes that's the build in "3 strings" C64 soundchip.This is not fabricated as kinda retro background music, it's native C64 sound.
Downloadlinks in the Youtube description in case you can look at it on the original machine on a CRT monitor which must be just stunning.
Or on the Vice emulator with PAL-monitor simulation.
And always remember, the (PAL) C64 runs on 0.985 MHz / 8 bit / 0,000064 GB Memory.

#demoscene

https://youtu.be/q56-23D7omY