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 Returners	Nobuo Uematsu			2:47	Final Fantasy VI OST	1994	E Standard	mute	1970-01-01
The Revenge of Vera Gemini	Blue Öyster Cult			3:56	Agents of Fortune	1976	E Standard	mute	1970-01-01
The Revolution Will Not Be Televised	Gil Scott-Heron			3:14	Pieces Of A Man	1971	E Standard	mute	1970-01-01
The Rider From Ice	Epidemia			5:14	Elfiyskaya rukopis	2004	Eb Standard	mute	1970-01-01
The Riders of Rohan	Howard Shore/Isac Saleh			3:31	The Lord of the Rings: The Two Towers OST	2019	E Standard	mute	1970-01-01
The Ring in Return	Coheed and Cambria			2:10	In Keeping Secrets of Silent Earth: 3	2003	E Standard	mute	1970-01-01
The Ripper	Judas Priest			2:53	Sad Wings Of Destiny	1976	E Standard	mute	1970-01-01
The Ripper	The Used			2:59	Lies for the Liars	2007	Drop D	mute	1970-01-01
The Ritual	Destruction			5:14	Infernal Overkill	1985	E Standard	mute	1970-01-01
The River	10 Years			4:05	From Birth to Burial	2015	Eb Drop Db	mute	1970-01-01
The River	Insomnium			8:00	Shadows of the Dying Sun	2014	D Standard	mute	1970-01-01
The River of Dreams	Billy Joel			4:09	River of Dreams	1993	Drop D	mute	1970-01-01
The Road To Devastation	Kataklysm			7:17	In The Arms Of Devastation	2006	B Standard	mute	1970-01-01
The Road To Hell Is Paved With Good Intentions	In Fear and Faith			3:40	Your World On Fire	2009	Drop D	mute	1970-01-01
The Robot Who Lost Its Head	Buckethead			3:58	March Of The Slunks	2012	E Standard	mute	1970-01-01