I quickly whipped up a fix for the super loud clock in GW.
It's the stock GW clock file at -9db. I also threw in -3, -6, -12, -18 if you want it louder or quieter.
Manual replacement and JSGME ready.
Download it and try her out.
Leave feedback here if you like, enjoy.
new home of the clock fix:
http://u-boot.realsimulation.com
Look in the SH3 downloads in the Grey Wolves section.