These people are a little nutty, and that’s what makes this whole thing work. Eva Ave and Carlosaur create a theatrical mush of piano, bass drum, hi-hat, snare drum, accordion, violin, guitar, ukulele and kazoo. Their voices fit together perfectly, and both gleefully stomp to the next wacky segment. The duo has described what it does as a “circus, pirate melody,” and that’s the best way to put it. A bit folky, slightly sardonic and completely uninhibited, Den of Drowning Rattlesnakes appeals to the fearless child in all of us. (SM)