This is the standard set of patch files that were originally distributed with the Gravis Ultrasound (GUS) driver. If you want to play a modern source port and have it sound like a GUS, you'll find these helpful.
The GUS patches have long been distributed under this filename. Timidity supports GUS patch (.PAT) files, so I've generated several Timidity configuration files that can be used with these patches. More information is below.