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
Rebel Yell (Billy Idol Cover)	Dope			4:08	No Regrets	2009	Eb Drop Db	mute	1970-01-01
Rebirthing	Skillet			4:00	Comatose	2006	Eb Drop Db	mute	1970-01-01
Reborn	Stone Sour			3:15	Come What(Ever) May	2006	Eb Drop Db	mute	1970-01-01
Reborn Of Nightmare	Thousand Leaves			3:51	Black Cloak Skeleton	2013	Eb Drop Db	mute	1970-01-01
Rebuild, Recreate	Dream State			5:03	Consequences	2015	Eb Drop Db	mute	1970-01-01
Reckless Paradise	Billy Talent	Combo		3:27	Reckless Paradise	2019	Drop D	mute	1970-01-01
Reckoning	Cave In			4:46	Heavy Pendulum	2022	Eb Drop Db	mute	1970-01-01
Reclamation	Lamb of God			7:07	Wrath	2009	Eb Drop Db	mute	1970-01-01
Recluse	Belmont			3:16	Belmont	2018	Eb Drop Db	mute	1970-01-01
Recollection Disaster	Shinigiwa Satellite			3:27	DEAD WEIGHT	2017	Drop D	mute	1970-01-01
Red	Motograter			3:49	Motograter	2003	Drop D	mute	1970-01-01
Red Criminal	THE ORAL CIGARETTES			4:40	Red Criminal	2021	Eb Drop Db	mute	1970-01-01
Red Door	Julien Baker			3:44	Single	2017	Drop D	mute	1970-01-01
Red Giant	Alice In Chains			5:35	Rainier Fog	2018	Eb Drop Db	mute	1970-01-01
Red Like Roses	Jeff Williams			3:16	RWBY Volume 1 Soundtrack	2012	Drop D	mute	1970-01-01