Silly "VCA" question

encoder audio's icon

Hi Guys,

I'm shocked, that after many years with Max, I still have these silly problems :(

How can I make a simple VCA?

I mean, I have a noise object, which goes into a '+' object. (left inlet)
Right inlet is a phasor, with a volume control.

I would like to achieve, that if I raise the volume of the phasor, it will turn down the volume of the noise, but actually there is no sound, until I turn on the phasor...

Maybe I should sleep or drink some coffee :D

Roman Thilenius's icon

maybe you should post the patch as far as you already got it.

to add some simple "modulation" to an oscillator can sometimes be tricky, it often invovlves + as well as *, sometmies even three objects.

Roman Thilenius's icon

i think what you want is to reverse the volume paramater for the noise, which you should do by !- 1.

otherwise you would have to measure the power of the right signal using average and stuff.

brendan mccloskey's icon
Max Patch
Copy patch and select New From Clipboard in Max.

Hi
I'll echo what Roman suggests - an example patch would more clearly demonstrate your precise needs. This example illustrates how to invert amplitude scaling, using either [!- 1.], or a neat little trick using the [cycle~] object's phase inlet:

Brendan