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
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
Redneck Stomp	Obituary			3:34	Frozen In Time	2005	D Standard	mute	1970-01-01
Reflection	Catch The Sun			3:48	Aspiration	2012	D Standard	mute	1970-01-01
Reformation	Amorphis			4:36	The Beginning of Times	2011	D Standard	mute	1970-01-01
Refuge of Souls	Ancestral			5:00	Master of Fate	2017	D Standard	mute	1970-01-01
Refuse/Resist	Sepultura			3:20	Chaos A.D.	1993	D Standard	mute	1970-01-01
Regain the Fire	Insomnium			4:30	One For Sorrow	2012	D Standard	mute	1970-01-01
Regorge in the Morgue	Vomitory			2:36	Opus Mortis VIII	2011	D Standard	mute	1970-01-01
Regret Not	All That Remains			4:23	This Darkened Heart	2004	D Standard	mute	1970-01-01
Regurgitated Disinformation	Job For A Cowboy			4:52	Ruination	2009	D Standard	mute	1970-01-01
Regurgitated Guts	Death			3:47	Scream Bloody Gore	1987	D Standard	mute	1970-01-01
Reign in Madness	Symphony X			8:41	Iconoclast	2011	D Standard	mute	1970-01-01
Rein Raus	Rammstein			3:13	Mutter	2001	D Standard	mute	1970-01-01
Reinkaos	Dissection			4:48	Reinkaos	2006	D Standard	mute	1970-01-01