The high violin modes were saturating the ASC-AS_C diode, breaking the SRC2 alignment loop.

We lowered its whitening gain from 36dB to 18dB (H1:ASC-AS_C_WHITEN_GAINSTEP from 12 to 6). Note that will mess with the ASC-AS_C calibration, so once the violins are down, we should bring it up again.