a = Pbind(\note, Prand([1, 3, 4], inf)).asStream;

// passing in an default event
a.next(Event.default); 
z = a.next(Event.default);
z.use { ~midinote.value } // for example

// Pevent
x = Pbind(\note, Prand([1, 3, 4], inf));
a = Pevent(x, Event.default).asStream;
a.next;

// pattern composition
x = Pbind(\note, Prand([1, 3, 4], inf));
a = (x <> Event.default).asStream;
a.next;