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
Underdog	Motionless In White			3:59	Infamous	2012	C# Drop B	mute	1970-01-01
Underground	Ben Folds Five			4:18	Ben Folds Five	1995	E Standard	mute	1970-01-01
Underground	Tom Waits			2:06	Swordfishtrombones	1983	E Standard	mute	1970-01-01
Underneath The Bunker	R.E.M.			1:29	Lifes Rich Pagent	1986	E Standard	mute	1970-01-01
Underneath The Rotting Pizza	Nobuo Uematsu			1:57	Final Fantasy VII OST	1997	E Standard	mute	1970-01-01
Underneath the Stars	The Defiants			5:15	The Defiants	2015	Eb Standard	mute	1970-01-01
Understand	Asian Kung-Fu Generation			3:48	Kimi Tsunagi Five M	2003	E Standard	mute	1970-01-01
Understanding Silence	Good Tiger			3:36	A Head Full of Moonlight	2015	E Standard	mute	1970-01-01
Understanding in a Car Crash (Ramen's Ver)	Thursday			4:29	Full Collapse	2001	Drop D	mute	1970-01-01
Undertow	As I Lay Dying			3:59	Shaped By Fire	2019	D Drop C	mute	1970-01-01
Undertow	Mr Big			4:51	What If	2011	Eb Standard	mute	1970-01-01
Undertow	Sara Bareilles			4:48	Careful Confessions	2004	E Standard	mute	1970-01-01
Underwater Garden	Septicflesh			6:51	Mystic Places Of Dawn	1994	D Standard	mute	1970-01-01
Undone	Failure			4:31	Magnified	1994	Eb Standard	mute	1970-01-01
Undress to Confess	Powerwolf			3:31	Call of the Wild	2021	Custom Tuning	mute	1970-01-01