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
The Rich Man	Roadrunner United			6:53	All-Star Sessions	2005	Custom Tuning	mute	1970-01-01
The Riddle	Gigi D'Agostino			4:55	L'Amour Toujours	1999	Custom Tuning	mute	1970-01-01
The Riddle	Thunderstone			3:59	10.000 Ways	2007	C Drop Ab	mute	1970-01-01
The Right To Go Insane	Megadeth			4:22	Endgame	2009	Custom Tuning	mute	1970-01-01
The Right To Remain Silent	VISMUT			3:15	The Right To Remain Silent	2013	D Drop C	mute	1970-01-01
The Ripple Effect	Auras			3:25	Heliospectrum	2016	Custom Tuning	mute	1970-01-01
The Rising	Killrbuckeye			4:21	Killerbuckeye	2009	D Drop C	mute	1970-01-01
The Rising Tide	Job For A Cowboy			4:47	Doom EP	2005	Custom Tuning	mute	1970-01-01
The River	Parkway Drive			5:30	Atlas	2012	Custom Tuning	mute	1970-01-01
The River	Wage War			3:51	Blueprints	2015	Custom Tuning	mute	1970-01-01
The River Dragon Has Come	Nevermore			5:10	Dead Heart in a Dead World	2000	Custom Tuning	mute	1970-01-01
The River Ov Knives	Worm Shepherd			5:17	Ritual Hymns	2022	Custom Tuning	mute	1970-01-01
The Riveters	Certain Death			4:47	The Vortex	2016	C# Standard	mute	1970-01-01
The Road To Hell	Chris Rea			4:28	The Road To Hell	1989	Custom Tuning	mute	1970-01-01
The Root Of All Evil (Live)	Dream Theater			8:22	Dream Theater Score 20th Anniversary World Tour	2006	Custom Tuning	mute	1970-01-01