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
Red River	Blood Red Shoes			3:20	Water	2013	Drop D	mute	1970-01-01
Red Rover	Black Pumas			3:56	Black Pumas	2019	E Standard	mute	1970-01-01
Red Velvet	Four Leaf Studios			3:31	Katawa Shoujo OST	2012	E Standard	mute	1970-01-01
Red Wings Over Baron	Powerglove			7:50	Metal Kombat For The Mortal Man	2007	Custom Tuning	mute	1970-01-01
Rediscovery (Segue)	Symphony X			1:29	V: The New Mythology Suite	2000	D Standard	mute	1970-01-01
Rediscovery Part II - The New Mythology	Symphony X			12:04	V	2000	D Standard	mute	1970-01-01
Reelin' in the Years (Steely Dan Cover)	The Fearless Flyers			3:09	III	2022	E Standard	mute	1970-01-01
Refrain Boy -English Ver.-	ALL OFF			3:36	Mob Psycho 100 ED Single	2016	Eb Standard	mute	1970-01-01
Refugio Vital	Agora			4:57	Segundo Pasado	2001	E Standard	mute	1970-01-01
Regression/Overture 1928	Dream Theater			5:43	Metropolis Pt.2: Scenes From A Memory	1999	Custom Tuning	mute	1970-01-01
Regret And The Grave	Cattle Decapitation			4:42	The Harvest Floor	2009	Eb Standard	mute	1970-01-01
Reincarnated Soul (Rock Version)	Yasushi Asada			3:37	Castlevania Bloodlines (Sega Genesis)	1993	E Standard	mute	1970-01-01
Reino Olvidado	Rata Blanca			5:35	Reino Olvidado	2008	E Standard	mute	1970-01-01
Reinventing The Wheel To Run Myself Over	Fall Out Boy			2:24	Take This To Your Grave	2003	E Standard	mute	1970-01-01
Reinventing Your Exit	Underoath			4:27	They're Only Chasing Safety	2004	Drop D	mute	1970-01-01