Shannon Fields + Gelsey Bell

The arrival of a new month brings a new guest curator to the Stone: opening September is Miguel Frasconi, a maverick performer on handmade glass instruments, and a veteran new-music hand with ties to John Cage, James Tenney and the Fluxus movement. His two-week series starts with a pair of disparate vocal improvisers and composers: Gelsey Bell at 8pm, and Shannon Fields at 10pm.