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
Happy languidness	Hajime Hyakkoku			1:42	K-ON!! OST	2009	Drop D	mute	1970-01-01
Languid	Little Tybee			5:23	Little Tybee	2016	Custom Tuning	mute	1970-01-01