Sheila pointed out that the violin mode damping filters were set to zero history - immediately in the switching settings in Foton. This was leading to large transients when making changes to the filters while they are ON. I went through all the filter banks and made changes to them (Bank1 and Bank2 for the 1st and second harmonics) for the ETMs and ITMs. In the new settings the input is Always ON and the output is Ramped, the ramp time has been set to 2 secs.