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
Nightmares	Nuclear Assault			4:00	The Plague	1987	E Standard	mute	1970-01-01
Nihilistic Overdrive	Disarmonia Mundi			4:55	Mind Tricks	2006	B Standard	mute	1970-01-01
Nijiiro Passions! (TV Size)	Nijigasaki High School Idol Club			1:40	Nijiiro Passions!	2020	E Standard	mute	1970-01-01
Nijiiro no Flugel	Yuki Aoi, Nana Mizuki, Ayahi Takagaki, Yoko Hikasa, Yoshino Nanjo, Ai Kayano, Minami Takayama			5:15	Senkizeshou SympshogearG Original Soundtrack6	2014	E Standard	mute	1970-01-01
Nikipol	Iwasaki Taku			3:27	Gurren Lagann BEST SOUND	2007	C Standard	mute	1970-01-01
Nikogda	Orgazm Nostradamusa			3:11	Smert amorala	2001	E Standard	mute	1970-01-01
Nineteen	Tegan And Sara			2:57	The Con	2007	E Standard	mute	1970-01-01
Nineteen Eighty	Joe Satriani			3:36	Shapeshifter	2020	Eb Standard	mute	1970-01-01
Niña	Los Outsaiders			3:30	Outsaiders	2013	E Standard	mute	1970-01-01
No Bullets Fly	Sabaton			3:42	Heroes	2014	Custom Tuning	mute	1970-01-01
No Bullets Fly	Sabaton			3:46	Heroes	2014	Custom Tuning	mute	1970-01-01
No Good Story Ever Starts With Drinking Tea	Turisas			2:55	Turisas 2013	2013	E Standard	mute	1970-01-01
No More Time Machine	LiSA			4:52	Sword Art Online II	2014	E Standard	mute	1970-01-01
No Ordinary Love	Sade			6:47	Love Deluxe	1982	E Standard	mute	1970-01-01
No Place For Disgrace	Flotsam And Jetsam			6:16	No Place For Disgrace	1988	E Standard	mute	1970-01-01