Pset sets a value in an event stream. It acts like one key in a Pbindf.( var a, b; a = Pset(\freq, 801, Pbind(\dur, 0.5)); x = a.asStream; 9.do({ x.next(Event.new).postln; }); )
the key.
can be a pattern or a stream. The resulting stream ends when that incoming stream ends.
the pattern.