Thank you very much brad, but I suspect something is really wrong now.. When I try to edit the concert grand amp velocity, the velocity don't make any difference...What it does is Increasing the damper resonance when i press the sustain...As lower the amp velocity gets, the damper resonance volume (while pressing sustain ) is going up....VERY weird....and I have the px-5s for more than a year and never saw something like that..I edited it before with no problem.. The amp attack also acts strange... On some of the stage settings it acts normal, but on the piano and several presets doing that weird behaviour.. Any idea?? Thanx a lot Mitelman