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
Reelin'	Iration			4:41	Hotting Up	2015	E Standard	mute	1970-01-01
Reeses Pieces I don't Know Who John Cleese Is	I Set My Friends On Fire			6:26	You Can't Spell Slaughter Without Laughter	2008	D Drop C	mute	1970-01-01
Reflection	Catch The Sun			3:48	Aspiration	2012	D Standard	mute	1970-01-01
Reflections	IRE			3:27	Poison Dreams	2021	C# Drop B	mute	1970-01-01
Refrain Boy	ALL OFF			3:36	Mob Psycho 100 ED Single	2016	Eb Standard	mute	1970-01-01
Refrain Boy -English Ver.-	ALL OFF			3:36	Mob Psycho 100 ED Single	2016	Eb Standard	mute	1970-01-01
Refugio Vital	Agora			4:57	Segundo Pasado	2001	E Standard	mute	1970-01-01
Regina Let's Go!	CPM 22			2:18	CPM 22	2001	E Standard	mute	1970-01-01
Regorge in the Morgue	Vomitory			2:36	Opus Mortis VIII	2011	D Standard	mute	1970-01-01
Regression/Overture 1928	Dream Theater			5:43	Metropolis Pt.2: Scenes From A Memory	1999	Custom Tuning	mute	1970-01-01
Regret	Drowning Pool			3:16	Drowning Pool	2010	C# Drop B	mute	1970-01-01
Regular People (Conceit)	Pantera			5:30	Vulgar Display of Power	1992	Eb Standard	mute	1970-01-01
Reign Of Sadness	Exumer			3:45	Possessed By Fire	1986	E Standard	mute	1970-01-01
Reign Of Terror	Sabaton			3:54	Primo Victoria	2005	E Standard	mute	1970-01-01
Reign Of The Tyrants	Jag Panzer			3:37	Ample Destruction	1984	Eb Standard	mute	1970-01-01