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
RassvetbI	Zemfira			3:58	PMML	2000	Drop D	mute	1970-01-01
Rasta	Rychagi Mashin			3:51	Poletaem	2012	Drop D	mute	1970-01-01
Raupatu	Alien Weaponry			4:01	Tu	2018	Eb Drop Db	mute	1970-01-01
Rautaketju	Turmion Katilot			3:41	Hoitovirhe	2003	Drop D	mute	1970-01-01
Ravenlight	Kamelot			3:41	The Shadow Theory	2018	Eb Drop Db	mute	1970-01-01
Ravetech Newworld	nao			4:28	Hyperdimension Neptunia ReBirth3 OP	2014	Drop D	mute	1970-01-01
Rawkfist	Thousand Foot Krutch			3:05	Phenomenom	2003	Drop D	mute	1970-01-01
Razor	Foo Fighters			4:57	In Your Honor	2005	Drop D	mute	1970-01-01
Re-done	Modern Baseball			4:35	Sports	2012	Eb Drop Db	mute	1970-01-01
Re:birth day	Roselia			4:31	Roselia 2nd single Re:birth day	2017	Drop D	mute	1970-01-01
Reach	Eyes Set To Kill			4:22	Reach	2008	Drop D	mute	1970-01-01
Reach	S Club 7			4:09	7	2000	Drop D	mute	1970-01-01
Reach	Skillet			3:26	Victorious	2019	Drop D	mute	1970-01-01
Reach For the Sky	Spiderbait			4:33	Spiderbait	2004	Drop D	mute	1970-01-01
Reach Out	Red Hot Chili Peppers			4:14	Return of the Dream Canteen	2022	Drop D	mute	1970-01-01