I'm using the Yamaha P-85 Digital piano. Unfortunately it has lately had some problems. When I'm playing to notes next to each other (especially e and f (mi & fa) or b flat and b (si & si sostenio) by turns fast the keyboard is playing just the note I'm touching first. For example if I play fast e, f, e, f, e, f, e - I can hear only the first e and that's it..! Sometimes this problem just disappear but sometimes it comes back with another problem. In that case when I play just one key the keyboard is actually playing many keys. So basicly in the first case when I'm playing a melody I can't hear all the notes I'm playing if they're close to each other. In the second case the playing will sound really off-tune, because the keyboard is adding some notes I'm not actually playing... Is there anything to do for this problem?
