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
4 Million Minutes	Zornik			3:47	4 Million Minutes	2008	E Standard	mute	1970-01-01
4 No Uta	BABYMETAL			4:09	BABYMETAL	2015	Eb Drop Db	mute	1970-01-01
4 Songs	Superjoint Ritual			6:22	Use Once and Destroy	2002	C# Standard	mute	1970-01-01
4 Words (To Choke Upon)	Bullet For My Valentine			3:50	The Poison	2005	D Drop C	mute	1970-01-01
40 Nights	August Burns Red			3:57	Leveler	2011	D Drop C	mute	1970-01-01
4000 Rainy Nights	Stratovarius			6:03	Destiny	2016	Eb Standard	mute	1970-01-01
409 In Your Coffee Maker	Green Day			2:58	Slappy	1990	E Standard	mute	1970-01-01
409 In Your Coffee Maker (D STD)	Green Day			2:58	Slappy	1990	D Standard	mute	1970-01-01
40oz. on Repeat	FIDLAR			3:48	Too	2015	Drop D	mute	1970-01-01
43 Burnt (Ramen's Ver)	The Dillinger Escape Plan			4:36	Calculating Infinity	1999	E Standard	mute	1970-01-01
44 Magnum Opus	Exodus			6:59	Shovel Headed Kill Machine	2005	D Standard	mute	1970-01-01
44 Minutes	Megadeth			4:40	Endgame	2009	E Standard	mute	1970-01-01
4D (Ramen's Ver)	Northlane			4:16	Alien	2019	Custom Tuning	mute	1970-01-01
4_D_Sharp_Pentatonic_Blues 11.05.21	Kyle Abent			3:53	Computer Generated	2021	E Standard	mute	1970-01-01
4_G_Egyptian	Kyle Abent			3:53	Computer Generated	2021	E Standard	mute	1970-01-01