amiga4001,
try to disable one or more caches of the 68060 before you start Magic64
for example....dusable only scalar cache or branch or data cache
experiment a bit
anyways you will not problem with speed disabling one or more caches of the 060 cause magic64works fine on a 030
also
check what says on magic64 guide on the sound part:
"playsid.library will not work with 68060"
read all what says there
my suggestions:
delete playsid.library from your libs directory and check if that is the problem
get 6581sid.library on aminet if you don't have it installed
pending
bye, Laser