Digital Pianos: 64 vs 128 polyphony?

When I was looking at Yamaha digital pianos, I noticed that some had "64 polyphony" and some had 128 polyphony ; I'm guessing that that's how many notes you can play at once (please correct me if I'm wrong). Will I ever notice the difference between 64 & 128 polyphony? Why is there this... show more When I was looking at Yamaha digital pianos, I noticed that some had "64 polyphony" and some had 128 polyphony ; I'm guessing that that's how many notes you can play at once (please correct me if I'm wrong). Will I ever notice the difference between 64 & 128 polyphony? Why is there this distiction?

Thanks for explaining this to me.
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