Environment:      Siren
Superclass:         Object
Category:         Music-EventModifiers
Instance variables:   selector function scale start stop index

EventModifier is the abstract superclass of the classes whose instances operate on event lists. There are operations that can be done eagerly (at definition time) or lazily (at run time)
Instance Variables:
   selector    What aspect of the event list do I modify
   function    What function do I aply to the aspect
   scale    Do I apply a scalar scale?
   start    When do I start in the event list?
   stop    When do I stop in the event list?
   index    Used internally to count through events

accessing

function
   Answer the receiver's 'function'.

function: anObject
   Set the receiver's instance variable 'function' to be anObject.

index
   Answer the receiver's 'index'.

index: anObject
   Set the receiver's instance variable 'index' to be anObject.

scale
   Answer the receiver's 'scale'.

scale: anObject
   Set the receiver's instance variable 'scale' to be anObject.

selector
   Answer the receiver's 'selector'.

selector: anObject
   Set the receiver's instance variable 'selector' to be anObject.

start
   Answer the receiver's 'start'.

start: anObject
   Set the receiver's instance variable 'start' to be anObject.

stop
   Answer the receiver's 'stop'.

stop: anObject
   Set the receiver's instance variable 'stop' to be anObject.

application

applyTo: evtList
   

valueIn: evtList at: time
   

MetaClass:         EventModifier class

instance creation

function: aFunction
   Create a new modifier and initialize it

new
   Create a new modifier and initialize it