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
Receipt	The Black Dahlia Murder			4:05	Abysmal	2015	C Standard	mute	1970-01-01
Reckless	Australian Crawl			5:26	Semantics	1983	E Standard	mute	1970-01-01
Reckless & Relentless	Asking Alexandria			4:18	Reckless & Relentless	2011	D Drop C	mute	1970-01-01
Reckless & relentles	Asking Alexandria			4:20	Reckless And Relentless	2011	D Drop C	mute	1970-01-01
Red Clouds	Disarmonia Mundi			5:20	Fragments Of D-Generation	2004	Custom Tuning	mute	1970-01-01
Red Like Roses	Jeff Williams			3:16	RWBY Volume 1 Soundtrack	2012	Drop D	mute	1970-01-01
Red Like Roses Part II	Jeff Williams			4:05	RWBY Volume 1 Soundtrack	2013	E Standard	mute	1970-01-01
Red Sky	Aviana			4:05	Epicenter	2019	Custom Tuning	mute	1970-01-01
Red Streamer Battle	Yoshito Sekigawa, Shoh Murakami, Yoshiaki Kimura, Hiroki Morisihita, Fumihiro Isobe			2:50	Paper Mario: The Origami King Original Soundtrack	2020	D Standard	mute	1970-01-01
Redshift Riders	Joe Satriani			4:53	Super Colossal	2006	E Standard	mute	1970-01-01
Reflections	Diana Ross & The Supremes			2:53	Reflections	1967	E Standard	mute	1970-01-01
Rei -Paranoia-	Hallucination Aria			4:59	Toushou Hysteria	2019	Custom Tuning	mute	1970-01-01
Relention	Katatonia			3:41	Discouraged Ones	1998	Eb Standard	mute	1970-01-01
Remaining	Ankor (Gregoriano 2007)			4:18	My own angel	2011	E Standard	mute	1970-01-01
Remove Kebab	Serbia Strong			5:09	Youtube	1980	E Standard	mute	1970-01-01