I am having the same problem as is described in this old thread:
I am wondering has anybody found a solution to it?
Posted 05 April 2014 - 10:34 PM
I had the same issue with my 5150 iii 50 watt head. The latency when switching channels on the amp with the M-13 was very annoying. The lag was slight, but noticeable in a practice situation enough to be annoying. I now use a midi foot controller to control the M13 along with amp channel switching, and the latency is gone. It grew the pedalboard a bit, but I now have all 48 scenes available to me with minimal tap dancing and completely interfaced with my amp channels.
I'm guessing because it wasn't designed to be a midi controller. I added in a midi thru box and it works flawlessly now!