Evan, Stefan, Matt (writing)

We've been seeing for a few days the bouncing of the harmonics of the 1kHz violins (exact harmonics, not higher violin modes).  Watching these on a fast spectrum shows an ~18s period, in which the harmonics appear out of the noise and grow by more than a factor of 10 as the beating at 1kHz reaches a maximum.  The 1kHz peak (in which the violin modes are unresolved) is only changing by a factor of about 5 (see attached).