I have no clue about hacking into the actual sound banks of the Z80 to get the musics extracted but I had a mess around in the Regen Debugger Z80 on Mr. Nutz Hoppin' Mad (Europe) (Proto) and the dancing numbers range from 01B0 2nd one in up until 0240 second to last number where the last number on that line is only a static one not dancing to the music.
Just watching the banks dancing is a bit of fun although I know nothing about dumping the tracks from the Z80.
This was the values on Nature by the way and some of the later tracks dance for shorter or longer values in the Z80 but seem to all start at the same value.