we are having several issues with ARC and Logic
Severly annoying issue(s) Running LPX 10.4.1 on (10.12.6 )
Video of issue no 1 here: https://vimeo.com/278950067
Note if I click by all control surfaces it stops. However weirdly if I do this in certain projects this choice is not saved as a preference. The issue before we rebuilt our computer recently (Mac Pro dustbin rebuilt because of the issue 2 below) seemed to go once you initially select bypass control surfaces and it was remembered in preferences but now it seems to keep occurring.
the work around posted in this forum doesn't work for us, if we pull out the rme we don't get the issue. there was also one for cutting out channels coming in however as the arc sends multiple midi channel numbers as found out in midi monitor its not as easy
We use an RME ARC USB controller to control Totalmix master outs and workflow snapshots.
Issue 2: We are also suffering with usb keyboard drop outs which I suspect is related to this same issue. Our USB keyboard works fine and then quite quickly within a session it drops out of logic (but when this happens you can leave logic open and goto OSX Audio/Midi and test connection and the keyboard is still there and works with the test tone) but you need to close logic to get a reconnection. this doesn't happen in any other daw, is not the keyboard or usb or hub. very much likely related to this over all issue of two devices fighting against each other.
Since 10.4 upgrade logic picks up the midi signal from the RME. Using midi monitor the arc sends midi signals every millisecond as the volume encoder is endless so its always sending signal. The RME seems to send various midi channel signals ranging from 1-4 upward. I have seem this issue discussed with LPX the RME ARC on the RME forum with a workaround discussed but I can't solve it.
I have tried applying a monitor in the clicks and Ports but it doesn't work for me. I can see that if I play a usb keyboard that the keyboard and are are received on the same channel.
I have the possibility of changing the usb keyboard midi in channel etc if I can block something. My concern is that the RME ARC USB seems to be sending on multiple channels.
HELP this is driving me mad (yes we can stop it by bypassing control surfaces but this should not be happening.