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               The Using Your GUS with Doom FAQ
           Brad Spencer (Bilbo) <spencer@ug.cs.dal.ca>
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  It shouldn't usually be a problem, but sometimes using your
GUS with Doom can produce strange results, so here are some
things to check if you have no sound or scratchy sound effects.

1. Everything tells me not to use the higher-than-8 IRQs with
   DOOM, but they work anyway?  What gives?

  Some configurations work with the high IRQs, some don't.  If
  it works but you are getting scratchy digitial sound effects,
  see below.

2. My music is cool, but the digital sound effects sound scratchy
   or just not the same as they did in Doom 1.2.  What is wrong?

  Ok, this is the big one.  For me, personally, Doom 1.2 was fine.
  No problems at all; no complaints.  But then id's sound guy
  tried to add Sound Blaster AWEful 32 support, and we all know 
  what a SB can do to nice sound. :)  As a result, when I played
  the beta version 1.4, 1.5 and 1.6, the digital effects were
  terrible.  Some people didn't have this problem, but I did 
  (even with my revision 2.4 GUS :).  After upgrading my Doom 1.2
  to 1.666 with the patch, I scanned the FAQ (thanks, Hank!) and
  saw two options that were labelled "unknown":  -GUS and -GUS1.
  I have found that with my 1 Meg GUS, a -GUS1 was all it took 
  to restore the original clear sound effects!  Thanks id, I
  guess, for fixing this :)  Perhaps -GUS works for other 
  Ultrasounds, but it did nothing for me.  I still hear the
  occasional pop or  click, but this seems to be a problem in the
  game rather than a GUS-specific problem.  (It happens on Sound
  Blasters, too.)

3. I tried all that, and it still doesn't work.

  Well, here is where those IRQs come in again.  If you used the
  -GUS1 option and still have scratchy sound, try changing you 
  GF1 and MIDI IRQs to levels below 8.  I can use 5,11 for Doom
  1.2 with no problems, but I have to do use 11,5 and a -GUS1 
  with Doom 1.666.  If you don't already have your IRQs set this
  level, or you need them at higher levels in order to use other
  programs, create a batch file such as this to run Doom:

    @ECHO OFF
    D:
    CD\GAMES\DOOM
    SET ULTRASND=240,7,7,11,5  (select GF1 IRQ=11, MIDI IRQ=5)
    C:\ULTRASND\ULTRINIT.EXE
    DOOM -GUS1
    SET ULTRASND=240,7,7,5,11 (select original IRQ settings)
    C:\ULTRASND\ULTRINIT.EXE

    * NOTE *  It seems that this _ONLY_ works with the 11,5 setting!
    If you find any more setting that work, please mail me!

  This is where the easy configuration of the GUS comes in
  handy.  You can change the setup on the fly with no
  problems at all.  If you still have scratchy sound . . .
  well, wait for the next FAQ! :)