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
Rainmaker	Vanden Plas			6:40	The god thing	1997	Eb Standard	mute	1970-01-01
Rainy Days Revisited	Hellacopters			3:44	By The Grace Of God	2002	Eb Standard	mute	1970-01-01
Ramen Shop "GROTESQUE"	Utsu-P			3:43	GALAPAGOS	2017	Custom Tuning	mute	1970-01-01
Rashisa	SUPER BEAVER			4:30	Rashisa / Watakushi-Goto	2014	E Standard	mute	1970-01-01
Raspberry Beret	Hindu Love Gods			3:57	Hindu Love Gods	1990	E Standard	mute	1970-01-01
Rasuka	Gesu no Kiwami Otome			4:00	Miryoku ga Sugoi yo	2014	E Standard	mute	1970-01-01
Rattlehead	Megadeth			3:42	Killing Is My Business... and Business Is Good! - The Final Kill	1985	E Standard	mute	1970-01-01
Ravioli	First of October			3:06	Gourmet Ravioli	2019	E Standard	mute	1970-01-01
Rawhide	Dead Kennedys			2:14	In God We Trust, Inc	1981	E Standard	mute	1970-01-01
Re-Animator	Rigor Mortis			3:23	Rigor Mortis	1988	E Standard	mute	1970-01-01
Re-Hash	Gorillaz			3:43	Gorillaz	2001	E Standard	mute	1970-01-01
Reach Out To The Truth	Persona 4 Golden			2:50	Persona 4 Golden	2008	E Standard	mute	1970-01-01
Ready To Go	Limp Bizkit			4:33	Ready To Go	2013	D Standard	mute	1970-01-01
Reality Bath	Lamb of God			4:37	Lamb of God	2020	Drop D	mute	1970-01-01
Reality Bath (Ajchili's Version)	Lamb of God			4:36	Lamb of God	2021	Drop D	mute	1970-01-01