Raising hands by tweeting that you’ve heard live jazz — write WHO, WHERE and #jazzlives — continues as a phenomenon, almost two months after the campaign began to test if there is an active young audience for the music. Results roll in from far and wide, though solicitations for them have slowed. Musicians are encouraged to tell their audiences to tweet, to spread word of their excellence and ramp up the numbers. A few recent samples follow. . .Â