Ok oops I observed this issue wrong when I posted this the first time. I had written the music slider was not working at all on the main menu, but it's actually that the main menu reads the music slider value when it starts and then cannot be changed afterwards.
I noticed the soundscript for the menu has both the music # and streaming * symbols, but this combination works fine on one of my maps that uses it on TF2C so hmm...
Ok oops I observed this issue wrong when I posted this the first time. I had written the music slider was not working at all on the main menu, but it's actually that the main menu reads the music slider value when it starts and then cannot be changed afterwards.
I noticed the soundscript for the menu has both the music # and streaming * symbols, but this combination works fine on one of my maps that uses it on TF2C so hmm...