To get DOOM to run properly with both music and digitized sound effects
on the Gravis UltraSound:  3 steps.

SOUND

*** NOTE: DOOM v1.2 may be able to use any valid GF1 IRQ including 11,12,15 ***

(1) Set your ULTRASND environment variable, and use GF1 IRQ less than 8

    example:  SET ULTRASND=220,1,1,7,5
                                   |_______ GF1 IRQ

MUSIC

(2) Doom requires that you have installed the General MIDI patch set from
the 2.06a Install Disks (or later) that came with your UltraSound (and are 
also available via FTP and BBS).  DOOM will find your patches (using the 
ULTRADIR variable) in the MIDI subdirectory pointed to by ULTRADIR.

    example:  SET ULTRADIR=C:\ULTRASND

    (DOOM will look in C:\ULTRASND\MIDI for the patches)

*** NOTE:  Step 3 is only required for DOOM v1.0 / Operating System 0.99 ***

(3) You will also need to copy ULTRAMID.INI into your DOOM directory and
rename it to DMXGUS.INI (or find and use the DMXGUS.INI file).  ULTRAMID.INI
is a part of the UltraMID/AIL package (also available via FTP and BBS).

SETUP

Run the SETUP program in the DOOM directory and select the UltraSound for 
both sfx and music.  Now run DOOM!

*** NOTE: DOOM v1.2 is known to occasionally lockup with GUS support. ***
***       If you experience frequent lockups and are using a high     ***
***       GF1 IRQ (11,12,15), try using a low IRQ (less than 8).      ***
