As long as this issue is dedicated to history of music, I decided to use a reference to famous 'Abbey road' cover to honor The Beatles band itself. Also I picked evolution chain-symbol to demonstrate how music evolved during the history.

Primitive man playing flute, Bach, Hendrix, Daft Punk following each other.

Jimi Hendrix's contribution to music history is immense, there was no choice to skip him on Abbey road.