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
Quoth The Raven	ELUVEITIE			4:44	Everything Remains (As It Never Was)	2010	Custom Tuning	mute	1970-01-01
Quoth The Raven	Eluveitie			4:45	Everything Remains (As It Never Was)	2010	B Standard	mute	1970-01-01
R!OT	Spoil Engine			3:29	Renaissance Noire	2019	Custom Tuning	mute	1970-01-01
R. U. Ready 2 Rock	Blue Öyster Cult			3:50	Spectres	1977	E Standard	mute	1970-01-01
R.A.M.O.N.E.S.	Ramones			1:28	Greatest Hits Live	1996	E Standard	mute	1970-01-01
R.O.C.K. in the U.S.A.	John Mellencamp			2:57	Scarecrow	1985	E Standard	mute	1970-01-01
READY STEADY GO (Cover)	Afterglow			3:48	BanG Dream! Girls Band Party! Cover Collection Vol.1	2018	E Standard	mute	1970-01-01
RED RIBBON	Emille's Moonlight Serenade			6:04	Red Ribbon	2018	Custom Tuning	mute	1970-01-01
REM	Polkadot Stingray			5:00	REM	2017	E Standard	mute	1970-01-01
REPAY	The Plot In You			3:13	REPAY	2020	E Standard	mute	1970-01-01
RIVER	10-FEET			4:24	Realife	2004	E Standard	mute	1970-01-01
RPG	SEKAI NO OWARI			4:55	Tree	2015	E Standard	mute	1970-01-01
Rabia	Nonpoint			4:21	Recoil	2004	D Drop C	mute	1970-01-01
Race War	Carnivore			5:56	Retaliation	1987	C# Standard	mute	1970-01-01
Rachael	She Wants Revenge			4:30	This is Forever	2007	E Standard	mute	1970-01-01