This work uses notation BB from Solo for Piano of Concert
for Piano and Orchestra. It consist of 4 events, the first two (to be produced somewhere between 0'36" and 1'00")
containing auxiliary sounds, the other two (to be produced between 1'24" and 1'36") using the interior piano construction.
The graphic score describes the time sequence of the events (notation in space, where 1 inch equals 12 seconds), as well
as their volume, relative pitch, length and tone color. However, it does not give a description of the actions themselves.
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