Alesis has unveiled the world's first USB/MIDI keytar - the Vortex - with a built-in accelerometer, 37 pressure sensitive keys and a host of buttons, sliders and controls.

Since he started playing tunes at various MBTA stops and stations, the Keytar Bear has become somewhat of a celebrity in Boston.

Want to simulate the experience of Keytar Bear in the wild? A new lens on Snapchat gives you the power to summon a digital version of him on your phone.

“Keytar Bear shows what our city can do for the little person,” Abby Taylor says when talking about the May 8 “Keytar Bear and Abby Taylor Day: Street Performer Fest” in Cambridge.