Former Eventbrite and Ticketfly executive Andy Donner has joined Mixhalo as the company's first chief commercial officer. Launched by Incubus guitarist Mike Einziger and violinist and Hans Zimmer collaborator Ann Marie Simpson, Mixhalo enables fans to hear music from every audiophile's favorite spot at a show — the sound board, where techs and audio engineers are usually positioned to hear the best audio quality so they can adjust and mix sound in real time."We make it simple so that fans can open up their phone, use their own headphones and enjoy an enhanced listening experience at concerts and live events," Einziger tells Billboard. "Live events in the format that we're used to wont be happening for a while.