Re: [PD] No voltage-controlled lowpass filter?
Hi, Is vcf~ (which is bandpass) the only available type of signal-controlled (smoothly-changing) filter? Doesn't the voltage-controlled version of lop~ and hip~ exist? Is it for a mathematical reason? (i.e. impossibility to implement in a relatively simple way) Or is it because it is trivial to build it in PD? If so, how? And if not, how would you approximate it, that is create in PD something similar to a simple low-pass filter whose cutoff frequency is controlled by a signal? Attached are some abstractions I once threw together which should be quite similar to the user-friendly ones. Sorry for the very silly help patch -- I hope I haven't made any stupid mistakes. MB #N canvas 195 68 319 395 10; #X obj 38 34 inlet~; #X obj 124 34 inlet~; #X obj 38 253 rpole~; #X obj 195 57 samplerate~; #X obj 195 79 swap 1; #X obj 195 102 /; #X obj 195 34 loadbang; #X obj 124 119 *~ 0; #X obj 71 119 sig~ 1; #X obj 71 180 -~; #X obj 38 227 *~; #X obj 38 278 outlet~; #X obj 124 143 max~ 0; #X obj 124 164 min~ 1; #X obj 124 79 *~ 6.28318; #X connect 0 0 10 0; #X connect 1 0 14 0; #X connect 2 0 11 0; #X connect 3 0 4 0; #X connect 4 0 5 0; #X connect 4 1 5 1; #X connect 5 0 7 1; #X connect 6 0 3 0; #X connect 7 0 12 0; #X connect 8 0 9 0; #X connect 9 0 2 1; #X connect 10 0 2 0; #X connect 12 0 13 0; #X connect 13 0 9 1; #X connect 13 0 10 1; #X connect 14 0 7 0; #N canvas 104 392 337 344 10; #X obj 38 64 inlet~; #X obj 94 64 inlet~; #X obj 38 243 rpole~; #X obj 185 88 samplerate~; #X obj 185 109 swap 1; #X obj 185 132 /; #X obj 185 64 loadbang; #X obj 94 149 *~ 0; #X obj 38 292 outlet~; #X obj 38 268 rzero~ 1; #X obj 94 171 max~ -1; #X obj 94 193 min~ 0; #X obj 94 109 *~ -6.28318; #X obj 93 227 +~ 1; #X connect 0 0 2 0; #X connect 1 0 12 0; #X connect 2 0 9 0; #X connect 3 0 4 0; #X connect 4 0 5 0; #X connect 4 1 5 1; #X connect 5 0 7 1; #X connect 6 0 3 0; #X connect 7 0 10 0; #X connect 9 0 8 0; #X connect 10 0 11 0; #X connect 11 0 13 0; #X connect 12 0 7 0; #X connect 13 0 2 1; #N canvas 36 660 566 311 10; #X obj 145 169 -~; #X obj 281 165 -~; #X obj 132 43 noise~; #X obj 272 52 sig~; #X obj 182 110 lop~; #X obj 137 82 vcl~; #X obj 263 96 vch~; #X obj 305 93 hip~; #X floatatom 337 38 5 0 0 0 - - -; #X obj 159 213 print~; #X obj 277 224 print~; #X obj 195 178 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1 -1; #X obj 330 179 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1 -1; #X text 381 37 - set cutoff; #X connect 0 0 9 0; #X connect 1 0 10 0; #X connect 2 0 5 0; #X connect 2 0 4 0; #X connect 2 0 6 0; #X connect 2 0 7 0; #X connect 3 0 5 1; #X connect 3 0 6 1; #X connect 4 0 0 1; #X connect 5 0 0 0; #X connect 6 0 1 0; #X connect 7 0 1 1; #X connect 8 0 3 0; #X connect 8 0 7 1; #X connect 8 0 4 1; #X connect 11 0 9 0; #X connect 12 0 10 0; ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] No voltage-controlled lowpass filter?
cyrille henry escribió: hello, there is a lot of discussion about filter in this list. if you wish to build filter with vanilla object, you can build yours with pole~ and zero~ objects. Whps I hadn't realised that a signal can be used as the coefficient for [rzero~] and [rpole~] Also, since so many times I don't find an answer to my questions in the archives, sometimes I forget to search before asking :$:$ thanks m. -- Matteo Sisti Sette matteosistise...@gmail.com http://www.matteosistisette.com ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] No voltage-controlled lowpass filter?
--- On Thu, 18/2/10, cyrille henry c...@chnry.net wrote: and lot's more with externals... ...although don't use bsaylor/svf~ and moog~ which both cause denormal errors on modern computers (and your audio siezes up) ed Matteo Sisti Sette a écrit : Hi, Is vcf~ (which is bandpass) the only available type of signal-controlled (smoothly-changing) filter? Doesn't the voltage-controlled version of lop~ and hip~ exist? Is it for a mathematical reason? (i.e. impossibility to implement in a relatively simple way) Or is it because it is trivial to build it in PD? If so, how? And if not, how would you approximate it, that is create in PD something similar to a simple low-pass filter whose cutoff frequency is controlled by a signal? thanks m. P.S. of course I'm talking about PD Vanilla... ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
[PD] No voltage-controlled lowpass filter?
Hi, Is vcf~ (which is bandpass) the only available type of signal-controlled (smoothly-changing) filter? Doesn't the voltage-controlled version of lop~ and hip~ exist? Is it for a mathematical reason? (i.e. impossibility to implement in a relatively simple way) Or is it because it is trivial to build it in PD? If so, how? And if not, how would you approximate it, that is create in PD something similar to a simple low-pass filter whose cutoff frequency is controlled by a signal? thanks m. P.S. of course I'm talking about PD Vanilla... -- Matteo Sisti Sette matteosistise...@gmail.com http://www.matteosistisette.com ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] No voltage-controlled lowpass filter?
hello, there is a lot of discussion about filter in this list. if you wish to build filter with vanilla object, you can build yours with pole~ and zero~ objects. you can also use biquad~ object. you can also use expr~ to make an equivalent of my bq~ object and use my abstraction to compute coeficients. and there is certainly lot's of other possibility with pure vanilla pd... and lot's more with externals... c Matteo Sisti Sette a écrit : Hi, Is vcf~ (which is bandpass) the only available type of signal-controlled (smoothly-changing) filter? Doesn't the voltage-controlled version of lop~ and hip~ exist? Is it for a mathematical reason? (i.e. impossibility to implement in a relatively simple way) Or is it because it is trivial to build it in PD? If so, how? And if not, how would you approximate it, that is create in PD something similar to a simple low-pass filter whose cutoff frequency is controlled by a signal? thanks m. P.S. of course I'm talking about PD Vanilla... ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
