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
Rat Salad	Black Sabbath			2:32	Paranoid	1970	E Standard	mute	1970-01-01
Re:birth	Acid Black Cherry			4:31	Re:birth	2012	E Standard	mute	1970-01-01
Rebel Love Song	Black Veil Brides			4:02	Set the World on Fire	2011	Eb Drop Db	mute	1970-01-01
Rebel Yell	Black Veil Brides			4:41	Rebels	2011	Eb Drop Db	mute	1970-01-01
Reborbate Romance	Blacklisted Me Feat.Samie Jayden			3:21	Blacklisted Me	2011	E Standard	mute	1970-01-01
Receipt	The Black Dahlia Murder			4:05	Abysmal	2015	C Standard	mute	1970-01-01
Red Eyes And Tears	Black Rebel Motorcycle Club			4:10	B.R.M.C	2001	Open C6	mute	1970-01-01
Red Eyes, Black Skies	Black Tusk			3:49	Taste The Sin	2010	D Drop C	mute	1970-01-01
Red Rover	Black Pumas			3:56	Black Pumas	2019	E Standard	mute	1970-01-01
Remedy	The Black Crowes			5:26	The Southern Harmony and Musical Companion	1992	Opend G	mute	1970-01-01
Remember When (Side B)	The Black Keys			2:14	Attack & Release	2008	E Standard	mute	1970-01-01
Renaissance Faire	Blackmore's Night			4:22	Shadow Of The Moon	1997	C Standard	mute	1970-01-01
Repentless	Beast In Black			4:10	From Hell With Love	2019	E Standard	mute	1970-01-01
Revelation	Black Veil Brides			3:39	Wretched and Divine: The Story of the Wild Ones	2013	Eb Drop Db	mute	1970-01-01
Revengeance Machine	BEAST IN BLACK			4:09	Dark Connection	2021	E Standard	mute	1970-01-01