[PD] Smoothing midi control input ?

[IOhannes m zmölnig]

On 02/22/2015 09:05 PM, Pierre Massat wrote:

> The input from the controller is first normalized to the delay line max
> length, then passed to a [pack 0 20], then to a [line~], before affecting
> the delay length. I thought the line would smooth the control input, but
> apparently it's not. Are the 20 ms for the [line~] too short

yes most likely.
20ms is equivalent to 50Hz which is well notifiable (you are modulating
your input signal with a 50Hz half-period)

as a rule of thumb, use something above 50ms (==20Hz which is basically
inaudible), the higher the smoother (though obviously the higher you
get, the longer it will take to reach the target; so having very long
lengths might become inacceptable as well)


> , or am I not
> doing it the proper way ? I actually don't know what happens to line~ when
> a new value is given to it before the 20 ms are over.
> 

[line~] interpolates from the *current* value to the target value in x ms.
the *current* value is the value it currently has.
so if you start with [0, 1.5 3000(, and after 1 second send it a
[0 100(, it will start the second ramp from 0.5 (because this is where
the 1.5/3000 ramp was interrupted).

gfrdsa
IOhannes


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