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
The Resurrectionists	The Defiled			4:50	Grave Times	2011	AEADG	mute	1970-01-01
The Revelation	Serenity in Murder			3:41	The Eclipse	2017	D Standard	mute	1970-01-01
The Rich Man	Roadrunner United			6:53	All-Star Sessions	2005	Custom Tuning	mute	1970-01-01
The Riddle	Gigi D'Agostino			4:55	L'Amour Toujours	1999	Custom Tuning	mute	1970-01-01
The Riddle	Thunderstone			3:59	10.000 Ways	2007	C Drop Ab	mute	1970-01-01
The Rider From Ice	Epidemia			5:14	Elfiyskaya rukopis	2004	Eb Standard	mute	1970-01-01
The Riders of Rohan	Howard Shore/Isac Saleh			3:31	The Lord of the Rings: The Two Towers OST	2019	E Standard	mute	1970-01-01
The Right To Go Insane	Megadeth			4:22	Endgame	2009	Custom Tuning	mute	1970-01-01
The Ring in Return	Coheed and Cambria			2:10	In Keeping Secrets of Silent Earth: 3	2003	E Standard	mute	1970-01-01
The Ripper	Judas Priest			2:53	Sad Wings Of Destiny	1976	E Standard	mute	1970-01-01
The Ripper	The Used			2:59	Lies for the Liars	2007	Drop D	mute	1970-01-01
The Rising Fighting Spirit	Toshiro Masuda			1:47	Naruto OST	2000	E Standard	mute	1970-01-01
The Rising Fighting Spirit	ToshiroMasuda			1:39	ToshiroMasuda	1990	E Standard	mute	1970-01-01
The Rising Sun	Buckethead			5:32	Single	2010	E Standard	mute	1970-01-01
The Ritual	Destruction			5:14	Infernal Overkill	1985	E Standard	mute	1970-01-01