>> Most (hardware) synthesizers and keyboard that I've seen appear to
>> use a simple LRU algorithm.
> That surprises me -

Me too.  I have a Korg 3500, which is documented as being 16-voice
polyphonic.  I once tried a run across about half the keyboard, with
the sustain pedal down.  I ended up with the first half-dozen and last
ten (or so) notes sounding; it definitely wasn't simple LRU.

Of course, this is a sample of size one, but it'd be hard to believe
this is the only synth to work this way.

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