Ralackk: Look for your gog redneck rampage folder within your start menu and it should have a setup file. Right click that and run it as administrator and then change the music from what it is to a device driver that doesn't work at all. You can test them within the program to see which one produces no sound.
Oddly enough,there is no music option on redneck rampage...Is there an update or something?Something I found in the "redneck rampage help file" which may be helpful is that the game originally ran its music from a cd.So,if there might be a way to delete these files or if dosbox runs a folder as if it were a cd then I may able to delete that entry in the config file that dosbox runs when playing a game.If anyone has an idea on where to find either of those it would be very cool to let us know :D.
EDIT:
AHA!!! Ive found it!.My theory was correct.
This following entry was used in order to act as if you had the redneck rampage music cd in your computer:
imgmount d ".\Redneck.inst" -t iso -fs iso'
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You could either delete the file "Redneck.inst"(back it up if needed).
or delete the entry which is found in the files:
dosboxRR.conf
dosboxRR_client.conf
dosboxRR_server.conf
dosboxRR_setup.conf
Its expansion pack "Suckin' Grits on Route 66":
dosbox66.conf
dosbox66_client.conf
dosbox66_server.conf
dosbox66_setup.conf
and finally the other expansion pack "Redneck Rides Again":
dosboxRA.conf
dosboxRA_client.conf
dosboxRA_server.conf
dosboxRA_setup.conf
Use "Ctrl + f" to find that entry more easily.
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I would recommend to back up this code in a notepad and place that notepad file in redneck rampage's directory or one of your choice.