Programming language = Musical Genre

ASM    = Hard Bop
CL     = Doo wop
Scheme = Swing
C      = Rock
C++    = Progressive Rock
Perl   = Psychedelic Rock
Python = Post punk
Java   = Doom metal
Ruby   = Noise
C#     = Progressive Metal
VB.NET = Disco

why would scheme be industrial and lisp classical?

Lisp would be folk, scheme would be classical.