Rob Goodale said in MMD980604, responding to Andy Taylor's query:

> The answer to your question is _yes_.  This is actually a project
> that is in high-gear R&D at PianoDisc.

I'm fairly ignorant of MIDI, but I understand that the signal for a
note start arrives at the same time as the signal for its velocity,
the latter having been measured over the previous 1/3 second or so as
the key descends.

Obviously an electronic instrument can immediately start an
appropriately soft or loud note, but how can you synchronise an actual
solenoid-operated acoustic piano to what is happening somewhere else
live, when to do the replication it must know what keys are starting
to be pressed, not just when audible notes occur ?

With MIDI, am I right, it can only start moving the key when the
originating piano has finished moving its own ?

Dan Wilson, London