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    Ladder 4 Pole LP Filter

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    • LindonL
      Lindon @DanH
      last edited by

      @DanH - you'd probably need to do it with C++ there are several well respected books on filter design - google it.

      Alternatively you could look at the filters in Faust.

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      • DanHD
        DanH @Lindon
        last edited by

        @Lindon Thanks - another issue is being able to update / create new filter displays for the UI. Any ideas on that anyone? Aside from drawing it all in PR 😆

        DHPlugins / DC Breaks | Artist / Producer / DJ / Developer
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        • DanHD
          DanH @DabDab
          last edited by

          @DabDab how do I get the Faust Moog? Can't see it on https://faustide.grame.fr/ but maybe I'm in the wrong place!

          DHPlugins / DC Breaks | Artist / Producer / DJ / Developer
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          • S
            sletz
            last edited by

            Possibly here: https://faustdoc.grame.fr/examples/filtering/#mooghalfladder and next ones.

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            • DanHD
              DanH @sletz
              last edited by

              @sletz Thank you! :)

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              • DabDabD
                DabDab @sletz
                last edited by DabDab

                @sletz said in Ladder 4 Pole LP Filter:

                Possibly here: https://faustdoc.grame.fr/examples/filtering/#mooghalfladder and next ones.

                @DanH here is an example

                process = dm.moog_vcf_demo;
                

                Click here to know more about moog faust library.

                ve.moogLadder (4th Order)
                

                Usage..

                _ : moogLadder(normFreq,Q) : _
                

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                • DanHD
                  DanH @DabDab
                  last edited by DanH

                  Ok finally trying the Faust Moog - It's mono lol... but has stereo in and out... Can make it work tho

                  DHPlugins / DC Breaks | Artist / Producer / DJ / Developer
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                  • DanHD
                    DanH @DanH
                    last edited by

                    @DanH ok no I can't 😆

                    It only takes the left channel - is there a node I can use to get the right input channel and switch it over to the left input?!

                    DHPlugins / DC Breaks | Artist / Producer / DJ / Developer
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                    Christoph HartC 1 Reply Last reply Reply Quote 0
                    • Christoph HartC
                      Christoph Hart @DanH
                      last edited by

                      @DanH I recommend spending 1-2 hours learning the absolute basics of Faust signal routing - turning a single channel processing module into a stereo module is super trivial if you now how it works. Just learn the basic operators and you should be able to do this (and many other simple things) yourself.

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                      • DanHD
                        DanH @Christoph Hart
                        last edited by

                        @Christoph-Hart ah ok... Will do!

                        DHPlugins / DC Breaks | Artist / Producer / DJ / Developer
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                        • DanHD
                          DanH @DanH
                          last edited by

                          @Christoph-Hart ok I found the bit to edit... I guess I'm confused as it's a parallel combination (2 ins, 2 outs) but only takes the left channel?

                          process = inputSignal : ve.moogLadder(normFreq,Q) <:_,_;
                          

                          DHPlugins / DC Breaks | Artist / Producer / DJ / Developer
                          https://dhplugins.com/ | https://dcbreaks.com/
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                          • d.healeyD
                            d.healey @DanH
                            last edited by

                            @DanH

                            I don't have an answer because it's been a long time since I played with FAUST. But if you haven't seen this already you should check it out - https://www.kadenze.com/courses/real-time-audio-signal-processing-in-faust/info

                            Libre Wave - Freedom respecting instruments and effects
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                            • DanHD
                              DanH @d.healey
                              last edited by

                              Are we allowed to use the Moog name to describe the moog style filter on our UI?

                              DHPlugins / DC Breaks | Artist / Producer / DJ / Developer
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                              • DanHD
                                DanH @DanH
                                last edited by DanH

                                @Christoph-Hart just digging into Juce.... Is there a reason all these Ladder filter options aren't included in Hise? And if it's possible to include them, please can you? Pretty please 😆

                                namespace juce
                                {
                                namespace dsp
                                {
                                
                                enum class LadderFilterMode
                                {
                                    LPF12,  // low-pass  12 dB/octave
                                    HPF12,  // high-pass 12 dB/octave
                                    BPF12,  // band-pass 12 dB/octave
                                    LPF24,  // low-pass  24 dB/octave
                                    HPF24,  // high-pass 24 dB/octave
                                    BPF24   // band-pass 24 dB/octave
                                };
                                
                                /**
                                    Multi-mode filter based on the Moog ladder filter.
                                
                                    @tags{DSP}
                                

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                                • d.healeyD
                                  d.healey @DanH
                                  last edited by d.healey

                                  @DanH I think if you called it Moog style you should be ok. Basically it comes down to trademark fair use. You are allowed to use trademarks as descriptors under certain circumstances, for instance if that's the only way to refer to a product.

                                  If you run a phone repair shop you would obviously need to say somewhere in your advertising that you repair both iPhone and Android phones. Those are both trademarks but referencing them in this way wouldn't violate the trademark as it doesn't imply an affiliation with those brands or an endorsement from the brand owners.

                                  So if you say your plugin contains a Moog filter that might be confusing - does that mean it was created by Moog specifically for you... so I think using Moog style would be the safe option because it's clear that it is not Moog. You could also include a disclaimer in your user manual/marketing material, etc.

                                  Or talk to a trademark lawyer, or send Moog an email and ask them.

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                                  • DanHD
                                    DanH @d.healey
                                    last edited by

                                    @d-healey Thanks, sensible thoughts! I can't think of an example of another dev using 'Moog-style' on their UI so maybe I'll avoid it :)

                                    DHPlugins / DC Breaks | Artist / Producer / DJ / Developer
                                    https://dhplugins.com/ | https://dcbreaks.com/
                                    London, UK

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