Whether or not you're a guitar hero like Eddie Van Halen, tickle the ivories like Liberace, play the bass like Paul McCartney, or bang the drums like Guy Patterson, you might be interested in an new smartwatch for musicians spotted today at CES by CNET. The Soundbrenner Core features a metronome that not only uses a pulsating light to mark the beat, it also vibrates while on the wrist of a musician.