ZX Spectrum 1bit multichannel music by Tim Follin. Recorded from the real hardware.

Yerzmyey says about 1bit music:
Many people think that attaching AY chip into ZX Spectrum was a regress. AY has only 3 channels of sound and pretty simple square wave based synthesis, whereas music generated by Spectrum's native soundsource, the Z80 chip (with help of ULA chip) was expandable to even 810, even 12 channels (software mixing) and it was able to generate really interesting envelopes.

This music has been written by Tim Follin. I strongly doubt it would sound good on 3 channels only and simple squarewave synthesis.
What is interesting, he has never made such great songs for any other musicchip or other platforms.

And I say:
TIM FOLLIN IS A GENIUS!