Passage from Reminded by the Instruments: David Tudor’s Music, by You Nakai (2021: Nakai, 227)
.A matter of influence and not control.
Unlike the latter, the former is a kind
of co
ordination
[…]difficult to perceive immediately or
experience directly […] it goes beyond
the usual scales of observation
in size—either too big or too small—or in
complexity—
either
too subtle
or too complex;
yet it produces an effect that can be felt.
You produce an effect that can be felt.

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Formatting added for emphasis.