The default preset and the Mark 1, which I used for my screen shots, have the same "stuff" at the beginning. I think the stuff might be a bit louder on the Mark 1 preset. Rightly so.
The stuff before the periodic waveform is mechanical clunks from the damper mechanism and hammer flange. Of course, that's part of the Rhodes sound. The problem for me at least is that the stuff lasts way too long (27 ms on C1) before the periodic waveform kicks in. Higher notes kick in much earlier. So, when I play low notes and high notes together, there is a noticeable disconnect. Very frustrating to play. I am pretty sure that some players will find the issue as frustrating as I do. I own three real Rhodes pianos, and none of them has lagging low notes.
FYI, the notes in my bounces were each at a velocity of 80, Rhodes V8 Pro version.
Thanks again for your patience with this. Kudos to Logic Pro Help!