Ton Trio II, On and On: Plenty to like in the new one by Aram Shelton’s Ton Trio II. The alto saxophonist’s compositions leave the door wide open for lengthy improvisations from himself as well as bassist Scott Brown and drummer Alex Vittum. Most pleasing it the seeming ease of Shelton’s lyricism at high speeds, the way a sailboat glides across the tops of choppy waves. Released a little earlier this year, it’s just now getting offered digitally.