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
Guitar ni Kubittake	Toyosaki Aki			3:34	K-ON! Character Image Song Series - Hirasawa Yui	2009	E Standard	mute	1970-01-01
Oh My Giita!!	Toyosaki Aki			4:16	K-ON!! Character Image Songs - Hirasawa Yui	2010	E Standard	mute	1970-01-01
Shiawase Hiyori	Toyosaki Aki			3:48	K-ON!! Character Image Songs - Hirasawa Yui	2010	E Standard	mute	1970-01-01
Sunday Siesta	Toyosaki Aki			3:38	K-ON! Character Image Song Series - Hirasawa Yui	2009	E Standard	mute	1970-01-01