How do you cancel the effects of a ParameterTransformer?

Question

If I use a ParameterTransformer to change a Sound's parameter, it will actually transform the values of every Sound with that parameter in the input tree. 

For instance if I have a flow like: Oscillator -> Filter -> ParameterTransformer
and I transform the Frequency parameter, both the Filter and Oscillator will have their Frequency parameter transformed. 

 

How would I cancel the effects of the parameter transformer so, for instance, only the parameter of the Filter is transformed?

Answer 1

If you use

snd doNotExpandFirst.

and

snd doNotTransformSubSounds

the Transformation affects only the immediate input. You can also check whether the Sound has a Frequency parameter using:

snd frequency isNil ifFalse: [snd frequency: 1000 hz]