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
Regret 1993	New Order			4:11	Best Of	1994	E Standard	mute	1970-01-01
Regret And The Grave	Cattle Decapitation			4:42	The Harvest Floor	2009	Eb Standard	mute	1970-01-01
Regret Not	All That Remains			4:23	This Darkened Heart	2004	D Standard	mute	1970-01-01
Reject Emotions	Destruction			6:51	Mad Butcher	1986	E Standard	mute	1970-01-01
Reject Yourself	Killswitch Engage			4:50	As Daylight Dies	2006	D Drop C	mute	1970-01-01
Remember To Forget Me	blink-182			3:32	NINE	2019	E Standard	mute	1970-01-01
Rent Act	The Wolfhounds			3:36	Bright And Guilty	1989	E Standard	mute	1970-01-01
Repeater (or For All is Dark Where Thou Art Not)	Shagohod			6:58	Tin, Gold, Lead & Blood	2021	E Standard	mute	1970-01-01
Reprendre mes esprits - Live au Hellfest 2019	Mass Hysteria			4:38	Hellfest (Live 2019)	2019	B Drop A	mute	1970-01-01
Resident Evil 2 - Scenario B Ending Theme	Capcom			2:38	Resident Evil 2 OST	1998	Custom Tuning	mute	1970-01-01
Resident Evil 2 Claire B Credits	Ueda, Uchiyama, Nishigaki			2:38	Resident Evil 2 OST	1998	Custom Tuning	mute	1970-01-01
Resident Evil 2 Ending Theme B	Masami Ueda			2:37	Resident Evil 2 OST	1998	E Standard	mute	1970-01-01
Resident Evil 3 Credits	Masami Ueda , Saori Maeda			2:10	Resident Evil 3	1999	E Standard	mute	1970-01-01
Resident Evil 4 Save Theme	Capcom			1:58	Resident Evil 4	2004	E Standard	mute	1970-01-01
Resident Evil Main Theme	Marilyn Manson			2:12	Resident Evil: Music From And Inspired By The Original Motion Picture	2002	E Standard	mute	1970-01-01