On Mon, Oct 28, 2013 at 10:05 AM, peiman khosravi <peimankhosravi@gmail.com> wrote:

Since I'm on a mailing spree: how can I make a pd version of slide~ (MSP), which, according to the msp reference, is a logarithmic lowpass filter for smoothing envelops. Anything similar will do. I'm using vline~ for now to smooth out midi faders but it doesn't feel quite the same. 

And on a related subject: what is the best way to create an exponential signal ramp?

[vline~] is not a lowpass filter, so I guess you use [vline~] to control a signal controlled lowpass filter. To make this exponentional you could connect [vline~] to the right inlet of [pow~] and make sure the output of [vline~] is [0-1] (and never exceeds 1). Then choose your range (e.g. [500-1000]). Connect [sig~ 2] to the left inlet of [pow~] and multiply the output by 500. To scale the range, just use [*~] or [/~] and never [+~] or [-~], for you're working on an exponential scale. This means that an output of 0 is impossible, so for a logarithmic amplitude control choose a very large range (e.g. 1-100000) and divide the output by the same value to get the range [1/100000-1].

Hope this helps.