Re: [PD] slide~ (msp) in pd
On Mon, Oct 28, 2013 at 10:05 AM, peiman khosravi peimankhosr...@gmail.comwrote: 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. 1-10) and divide the output by the same value to get the range [1/10-1]. Hope this helps. ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] slide~ (msp) in pd
On Mon, Oct 28, 2013 at 10:05 AM, peiman khosravi peimankhosr...@gmail.comwrote: And on a related subject: what is the best way to create an exponential signal ramp? A simpler way to get a similar result is to range the output to [0-1], just as described before, but then just take a power of it. The higher the power, the sharper the curve. Then multiply the whole to your preferred range. In this case a range starting with 0 is possible, for it is not an exponential range as in the previous example. An example: [1 20, 0 500 20( | [vline~] | [pow~] | [*~ your_maxval] | ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] slide~ (msp) in pd
On 28/10/2013 10:05, peiman khosravi 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 guess you could re-emplement it with [fexpr~]. Often, though, for smoothing non-singnal control messages (e.g. attaching a vslider to a [*~]) a simple [lop~] is more than enough (and rather 'economic')... Lorenzo. ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] slide~ (msp) in pd
Thanks very much. This is the answer for me! Best, Peiman *www.peimankhosravi.co.uk || RSS Feedhttp://peimankhosravi.co.uk/miscposts.rss || Concert News http://spectralkimia.wordpress.com/* On 28 October 2013 10:27, Funs Seelen funssee...@gmail.com wrote: On Mon, Oct 28, 2013 at 10:05 AM, peiman khosravi peimankhosr...@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. 1-10) and divide the output by the same value to get the range [1/10-1]. Hope this helps. ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
