Digidesign today announced the release of Pro Tools 6.4, a new version of its professional audio editing solution for use with Pro Tools|HD and Pro Tools LE systems. Pro Tools 6.4 includes features such as Automatic Delay Compensation, TrackPunch (on-the-fly track arming/punching), TrackInput (track-by-track input switching), 23.976 fps support for HD video, +12 dB fader support, Foley “input mute” mode, and more. Pro Tools|HD customers can purchase an upgrade from Pro Tools 5.x or 6.x for US$150 US. Pro Tools 6.4 comes with all new Pro Tools systems and is a free upgrade for registered owners of Pro Tools LE 6.0 or higher. [Site not yet updated.]