Avid Pro Tools HD Native Thunderbolt+ HD MADI Bundle - bundle with HD native Thunderbolt Interface and HD-MADI Interface, with Pro Tools HD software (same features as Pro Tools HD but using host processing only), up to 256 audio tracks, 128 aux tracks, 128 busses, 128 instrument tracks, 70 audio effects, works with HD Omni, HD MADI, HD I/O 8x8 and 16x16 interfaces. Includes PT HD software, plug-ins, interface cable/adapter and iLok key. bundle includes HDI/O MADI Interface.