Zivix has a new wireless MIDI device for Apple-centric musicians, but unlike the original WiFi Puc , this time it's using Bluetooth 4.0. The Puc+ is the "first Bluetooth MIDI interface that universally supports any MIDI controller," according to the company. It can handle multiple controllers at once, connect to old-school 5-pin or newer USB MIDI devices, and work with any audio workstation running on a Mac, iPad or iPhone -- including GarageBand, ProTools and others.