Cosgrove, Conover, Sherry & Rattlesnake Arm to take part in Out of the Blue Livestream Series Share Max García Conover Ben Cosgrove, Max Garcia Conover, Griffin Sherry and Rattlesnake Arm (Max Davis) will perform in the Out of the Blue Livestream Series at 7 p.m., Wednesday, Feb. 24 Cosgrove is a composer, pianist, and multi-instrumentalist based in New England. He performs regularly both as a solo artist and as a sideman, tours widely across the U.S. and Canada, writes scores for films, plays, radio, and television, and has produced several well-received albums of original instrumental music. 88 Notes from Chris Spencer on Vimeo .