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
Hito to Shite Jiku ga Bureteiru	Otsuki Kenji and Zetsubou Shoujo tachi			3:34	Sayonara Zetsubou Sensei Op	2007	E Standard	mute	1970-01-01
Kuusou Rumba	Otsuki Kenji and Zetsubou Shoujo tachi			4:30	Zoku Sayonara Zetsubou Sensei Op	2008	Drop D	mute	1970-01-01
Ringo Mogire Beam!	Otsuki Kenji and Zetsubou Shoujo tachi			4:51	Zan Sayonara Zetsubou Sensei Op	2009	C# Drop B	mute	1970-01-01