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
River	AKB48			4:43	Kamikyokutachi	2009	E Standard	mute	1970-01-01
Road Games	Allan Holdsworth			4:16	Road Games	1983	E Standard	mute	1970-01-01
Road To Nowhere	Bullet For My Valentine			4:22	Scream Aim Fire	2008	D Standard	mute	1970-01-01
Robocop Gay	Mamonas Assassinas			3:02	Mamonas Assassinas	1995	E Standard	mute	1970-01-01
Rock And Roll Dreams Come Through	Jim Steinman			6:31	Rock and Roll Dreams Come Through	1981	E Standard	mute	1970-01-01
Rock Club	Anamanaguchi			2:36	Scott Pilgrim vs. the World: The Game (Original Videogame Soundtrack)	2010	Eb Standard	mute	1970-01-01
Rock and Roll, Hoochie Koo (No Bass)	Rick Derringer			3:47	All American Boy	1973	E Standard	mute	1970-01-01
Rock and roll y fiebre	Pappo			3:57	Buscando un amor	2003	E Standard	mute	1970-01-01
Rocket	Smashing Pumpkins			4:09	Siamese Dream	1993	E Standard	mute	1970-01-01
Rocket Skates	Deftones			4:19	Diamond Eyes	2010	BEADG	mute	1970-01-01
Rocking The Boat (ft. Jeremy Schwartz)	Ice Nine Kills			4:14	The Silver Scream	2018	AEADG	mute	1970-01-01
Roda roda vira	Mamonas Assassinas			2:23	Mamonas Assasinas	1995	E Standard	mute	1970-01-01
Romeo to Cinderella	Poppin Party			4:43	BanG Dream! Girls Band Party! Cover Collection Vol.4	2020	E Standard	mute	1970-01-01
Roots and Leaves	Aephanemer			7:23	A Dream of Wilderness	2021	Custom Tuning	mute	1970-01-01
Routes	Lamb of God			3:14	Lamb of God	2020	Drop D	mute	1970-01-01