I'm usually much inspired by such questions, but I would only say that we shall ask another question so as to answer this one :
"Is there anything like a "true" act of revolt ?".
I mean, sincerely, I think that an act of revolt is true, or it's not an act of revolt.
Not trying to make some rethoric there.
Adorno once wrote that "Ideology tries to integrate even the most radical acts".
The situationists (of the I.S) turned that into "ideology tries to integrate even the most radical arts", which could answer your question about music.
They also wrote on walls something like "Ideology tries to integrate even the most radical gesture".
To put it in once as a thousand : power and ideology will always try to reward you for anything if that can be beneficial to it.
I mean, after all, even some of the biggest hackers, rebells, outlaws, thugs, or murderers have sometimes been recuperated, even after their death (as it's always easer to make the dead speak) : as snitches, police informants, computer security consultants, historical figures to put in some pantheon, etc.
It also means that an act of revolt is never to be taken out of context.
Guy debord also wrote that "since art is dead , we know that it is easy to disguise cops in artists". ;-)
The position of the situationists is general consisted in thinking that their is no rebellion that limited to the field of "art" and that there is no rebellion without "art".
I think that's what they meant by the "supersession of art".