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[QUOTE="delaware dave, post: 216679, member: 4296"] 128 "Voices" of polyphony. I don't own your keyboard but if the instruments are compromised of more layers or voices then that instrument (for each note struck) uses more polyphony than an instrument compromised of less voices or layers. I would have to venture to say that your better sounding piano probably has more voices, more sampled layers. So it will use more polyphony than other instruments (per note struck). You also mentioned sustained notes are dropping; less use of the sustain pedal would help the envelope of the instrument to get to a zero level so that the polyphony is released back into the pool. All of the instruments and pads come out of the shared bucket. Many keyboards use the envelope ADSR approach (attack, decay, sustain, release). During release the polyphony returns to the "pool" as available. Pianos have a longer sustain time than some other quick hitting sounds, especially if you are using the sustain pedal to "lengthen" the sustain. Also the sustain pedal is the equivalent (for acoustic piano) of holding the note down and not releasing the note; so holding notes with your fingers even if you are not using the sustain pedal would be the equivalent to striking the note, holding down the pedal and releasing your fingers from the note; you'll get the same effect as not using the sustain pedal but striking and holding down the note, so be cognizant of this effect as well. The methodology of what notes drop first is different by manufacturer. I don't know what the philosophy was coded into the software of the PA4x and I don't want to speculate; but a pad that plays continuously in the arrangement will certainly hold polyphony longer as well as the use of the sustain pedal. Reducing the number of backing instruments and pads or reducing the length of time that those instruments are continually holding a sound will also help. [/QUOTE]