Stefano Toschi (electric guitar), Alen Grassi (electric bass), Luca Borsetti (drums, percussion), formed "Once Gravity" trio about two years ago. "Hidden River" is their second album, after "Natural Features” (Lurker Bias). They have recently collaborated with several musicians, including, Marcello Magliocchi, Matthias Boss, Guy Frank Pellerin, Bruno Gussoni and Alipio Carvalho Neto.