Home › Forums › Products › Plug-Ins › UltraChannel fails authorization at ProTools startup › Reply To: UltraChannel fails authorization at ProTools startup June 22, 2014 at 2:19 pm #126190 DGillespieModeratorEventide Staff Hi Scott, UltraChannel is compatible with ProTools 10.3.6 and higher only. An update to 10.3.8 should be a free update from the Avid site. Thanks, Dan
