I do think you should buy another SB soundcard. If you buy a Sound Blaster AWE32 you’ll be able to use the General Midi/Roland MT32 emulation tools which will greatly enchance the midi music quality in Sierra DOS based games (only a few have native AWE32 support under DOS). All Windows based games run great with the AWE32.
If you don’t get/have/find drivers for the AWE32 I’ll send them to you! I have all original disks.