Re: Sysex Home › Forums › General › Using Ctrlr › Sysex › Re: Sysex July 23, 2011 at 9:25 am #2998 sawanParticipant Topics: 3Replies: 23Total: 26★ The ATC definitely uses sysex for certain parameters. That’s the reason Midiquest is able to control the things you can’t access with ccs.