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
Redemption	Shadows Fall			4:20	Threads Of Life	2007	Drop D	mute	1970-01-01
Refrain Boy	ALL OFF			3:36	Mob Psycho 100 ED Single	2016	Eb 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
Regret Not	All That Remains			4:23	This Darkened Heart	2004	D Standard	mute	1970-01-01
Rei -Paranoia-	Hallucination Aria			4:59	Toushou Hysteria	2019	Custom Tuning	mute	1970-01-01
Reign Of The Hammer	HammerFall			2:53	Threshold	2006	Eb 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
Relatos Salvajes (Wild Tales)	Gustavo Santaolalla			1:33	Soundtrack	2014	Eb Standard	mute	1970-01-01
Remember Tomorrow	Metallica			5:49	Maiden Heaven	2008	Eb Standard	mute	1970-01-01
Remember Yesterday	HammerFall			5:08	Legacy Of Kings	1998	Eb Standard	mute	1970-01-01
Remembering Sunday	All Time Low			4:19	So Wrong, It's Right	2007	E Standard	mute	1970-01-01
Renegade	Hammerfall			4:27	Renegade	2000	Eb Standard	mute	1970-01-01
Revenge Of The Nameless Ranger	Modern Baseball			2:36	MoBo Presents The Perfect Cast EP 2015	2014	Eb Standard	mute	1970-01-01
Rich Girl	Daryl Hall & John Oates			2:29	Rich Girl	1976	E Standard	mute	1970-01-01
Ride The Lightning	Metallica			6:40	Ride The Lightning	1984	E Standard	mute	1970-01-01