IDMUS - This lets you change the music of the level your on
I know it works on doom 2 but no sure about doom 1

The DOOM 2 Cheat Codes
IDDQD = Toggles the God Mode On/Off
IDKFA = Gives You All The Weapons, Keys, Ammo, and 200%
Armor
IDFA = Gives You All The Weapons, Ammo and 200% Armor
IDBEHOLD + Following
S - Get Beserk Strength
V - Temporary Invulnerability
I - Temporary Invisibility
A - Get Full Automap
R - Get Anti-Radiation Suit
L - Light Amplification Visor

IDCLIP = Toggles The Clipping Mode
IDCHOPPERS = Get The chainsaw and a Message!
IDCLEV = (Episode #) (Map #) - Level Warp
IDDT = Toggles between normal map, fullmap, and fullmap +
objects
IDMYPOS = Displays coordinates and heading
IDMUS = (Map #) - Plays Music from Selected Level

iddqd--invincibillity
idkfa--max armor,ammo and weapons
idspispopd--walk through walls
idbehold--(thereafter followed by pressing s,v,r,a or l)
*S--BERSERK STRENGTH-- lasts rest of level
*V--invulnerbility--lasts 30 seconds
*R--radiation suit-- lasts rest of level
*A--allmap--lasts rest of level(computer map)
*L--light amplifiers--lasts 30 seconds

Here are all the doom cheats that I know:

IDKFA =all weapons and keys
IDDQD =invincibility
IDFA =all weapons
IDBEHOLD =cheat bar(look at top of screen and
press the 1st letter of what you want)
IDSPISPOPD=walk though walls