"Sat C5 Range Dropout"

[Newton Hunt]

The problem is that the microphone is in the node area of the tone being
viewed.  If you elivate the SAT or "turn it on it's ear" you will pick
up the tone.  This is not the fault of the SAT, it's microphone, it's
program or it's filters.  It is simply that the pic is sitting at the
nodal point.  This only happens on grands.

                    Newton