Re: [sc-users] question regarding \filter -> Function

[Julian Rohrhuber <rohrhuber@xxxxxxxxxxxxxx>]

> Hi ppl,
>
> I have a question regarding the \filter slot of a NodeProxy. I would 
> like to do the following:
>
>
> p = ProxySpace.push(s)
>
> ~f = {
>     SinOsc.ar([300,1200],0,0.1)
> }
>
> ~f.play
>
> //access channel 1 of the 2 channel audio stream
> ~f[1] = \filter -> {
>     arg in;
>     in[0]
> }  
>
> This doesn't work; what is being played are both SinOsc's. Changing 
> to in[1], plays the higher sinetone only. Could someone explain this 
> behaviour, as I don't really understand what the type 'in' argument 
> is, thus don't know how to access the audio streams independently? 
> Just from a gut-feeling I find it quite intuitive to access the 
> input stream as an array, like with other multichannel audio streams.


the proxy has 2 channels, your filter only one, so it does not 
override all. Two ways to do it:

//access channel 1 of the 2 channel audio stream
~f[1] = \filter -> {
    arg in;
    Pan2.ar(in[0], -1)
}  

//access channel 1 of the 2 channel audio stream
~f[1] = \filter -> {
    arg in;
    [in[0], 0]
}
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