Today I followed up on last night's commissioning of the ETMY violin mode damping.  I tested the ETMY L2 darm damping filter that was set up for the 508.1Hz violin mode (MODE2), feeding back to pitch.  Last night I found that a positive gain of 500k had an effect on the mode, but this was while the L2 current watchdog was tripped.  Tonight a gain of -30k worked well, so the current watchdog apparently reduces the drive AND flips the sign at high frequencies.

The attached plot shows progress of the mode with different gain settings.  As of this writing the mode is as low as it's ever been.  (To get this mode lower, we'll need to compete with the mode at 508.2Hz.  Tricky.)