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
Bitter Bitter Sweet	Hayami Saori & Touyama Nao			3:50	Yahari Kono Character Song wa Machigatteiru.	2013	E Standard	mute	1970-01-01
Coolly Hotty Tension Hi!!	Fujitou Chika			3:57	K-ON! Character Image Song Series - Nanabe Nodoka	2009	E Standard	mute	1970-01-01
Dear My Keys -Kenban no Mahou-	Kotobuki Minako			4:38	K-ON! Character Image Song Series - Kotobuki Tsumugi	2009	E Standard	mute	1970-01-01
Diary wa Fortissimo	Kotobuki Minako			3:57	K-ON!! Character Image Songs - Kotobuki Tsumugi	2010	E Standard	mute	1970-01-01
Drumming Shining My Life	Satou Satomi			3:28	K-ON!! Character Image Songs - Tainaka Ritsu	2010	E Standard	mute	1970-01-01
Girly Storm Shissou Stick	Satou Satomi			3:37	K-ON! Character Image Song Series - Tainaka Ritsu	2009	E Standard	mute	1970-01-01
Guitar ni Kubittake	Toyosaki Aki			3:34	K-ON! Character Image Song Series - Hirasawa Yui	2009	E Standard	mute	1970-01-01
Heart Goes Boom!!	Hisaka Youko			3:38	K-ON! Character Image Song Series - Akiyama Mio	2009	E Standard	mute	1970-01-01
Hello Alone -Band arrange-	Hayami Saori & Touyama Nao			4:14	Yahari Kono Character Song wa Machigatteiru.	2013	E Standard	mute	1970-01-01
Hello Little Girl	Hisaka Youko			4:42	K-ON! Character Image Song Series - Akiyama Mio	2009	E Standard	mute	1970-01-01
Hidamari Living	Fujitou Chika			4:57	K-ON!! Character Image Songs - Manabe Nodoka	2011	E Standard	mute	1970-01-01
Honmei Answer	Nao Touyama & Kana Hanazawa			3:57	Nisekoi Character Songs	2014	E Standard	mute	1970-01-01
Humming Bird	Kotobuki Minako			3:51	K-ON! Character Image Song Series - Kotobuki Tsumugi	2009	E Standard	mute	1970-01-01
Jajauma Way To Go	Taketatsu Ayana			4:31	K-ON! Character Image Song Series - Nakano Azusa	2009	E Standard	mute	1970-01-01
Joyful Todays	Taketatsu Ayana			3:09	K-ON!! Character Image Songs - Nakano Azusa	2010	E Standard	mute	1970-01-01