Is there something similar to the analyzer part of '10 Years of HVSC' music disk?
http://noname.c64.org/csdb/release/?id=44014
(if you wait a little you'll see it pop up briefly in the animgif)
It can be for PC or for C64 (or smartphone or whatever), as long as it can load .sid files.
Closest thing I've found so far is the oscilloscope display of JSIDPlay, but it doesn't come close in terms of functionality
I'd be thankful for any suggestions.