From the Apolyton site, for those who haven't seen it. These add additional sound drivers to CIV making the "other" option for sound useful. The primary benefit is supporting OPL3 cards like Soundblaster 16... meaning STEREO SOUND for our beloved game (!). We also get Generic MIDI, which DOSBox could route to an external synthesizer for MIDI music playback.
This file was downloaded from the Microprose BBS. The following is the file README.SND from this archive:
New sound drivers for Civilization
Due to the continued popularity of MicroProse's best seller, Civilization, your friends in the MPS Sound Department have created new sound drivers to support the latest sound cards.
Support is added for all OPL-3 based FM cards (Pro Audio Spectrum Plus, 16, Studio; Sound Blaster Pro, 16, 16ASP, AWE32; AdLib/Cardinal Gold; Microsoft Windows Sound System; and all compatibles) and for any General MIDI card or external synth via a standard MPU-401 type MIDI interface. The General MIDI driver is optimized for the Roland SCC-1, but works well on any GM device.
Installation
First unzip this archive to your mps\civ directory, then run 'SOUND' (in the Civ directory) to specify your card's type and address. As you run Civ, when it asks you what sound card you are using, select #6, Custom sound driver. Enjoy!
Included Files
SOUND.EXE - sound install program
PSOUND.CVL - Pro cards (OPL-3) driver
GSOUND.CVL - General MIDI sound driver
CONFIG.SND - sound card configuration file
README.SND - this file
MPS Sound Department - April, 1994