It is almost impossible to find out anything about Canto. After much googling, I'm still not sure of the band memeber's names nor their history.  However, it does appear that Canto is made of a trio of brothers.
They have a very good, but rough beginners' sound. A few of these tracks would have done very well for the deconstructed Scott Pilgrim vs. The World soundtrack. There is a gruff eagerness as you can tell they're trying chords that challenge them and they play with passion
Favorite tracks for me:
Cardigan Sweater is a very atmostpheric track that reminds me of the Weezer's Blue album and their Sweater Song. Cardigan is lighter on the lyrical content, however.
Gresious starts out witha great pop-rock sound that breaks down to soemthing more slow and experimental. 
There is an overall concentration on mood and ambience on HA HA HA. The lyrics aren't deeply personal nor do they tell a story, but their sound is solid. With practice and time, I can absolutely see  Canto becoming music industry darlings