ShredDB is an experimental .shred library, I removed the audio so it's pretty useless. You can find the source .psarc files here.

Song	Artist	Play	Shred	Length	Album	Year	Tuning	Uploader	Updated	Delete
Kid Icarus Underworld Theme	Hirokazu Tanaka			1:39	Game Cartridge	1986	D Standard	mute	1970-01-01
Mario 3 - Underworld	The Advantage			0:55	Self-Titled	2004	E Standard	mute	1970-01-01
Permitting The Noble Dead To Descend To The Underworld	Nile			3:35	Those Whom The Gods Detest	2009	B Drop A	mute	1970-01-01
The Underworld	Sonic Mayhem			2:34	Quake II	1997	E Standard	mute	1970-01-01
The Underworld Domain	Old Man's Child			4:51	In Defiance of Existence	2003	Eb Standard	mute	1970-01-01
They are the children of the underworld	Deicide			3:12	Once upon the cross	1995	Eb Standard	mute	1970-01-01
Timmy & The Lords of the Underworld	Timmy & The Lords of the Underworld			2:08	Timmy & The Lords of the Underworld	2000	E Standard	mute	1970-01-01
Timmy And The Lords Of The Underworld	Timmy And The Lords Of The Underworld			0:55	South Park	2000	E Standard	mute	1970-01-01
Timmy and the Lords of the Underworld	DVDA			2:08	Timmy and the Lords of the Underworld	2000	Eb Standard	mute	1970-01-01
Underworld	Evile			4:17	Skull	2013	Eb Standard	mute	1970-01-01
Underworld	Running Wild			6:24	Masquerade	1995	E Standard	mute	1970-01-01
Underworld	Symphony X			5:51	Underworld	2015	D Standard	mute	1970-01-01