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    Scriptnode - Bias

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    • C
      clumsybear
      last edited by

      @ustk interesting approach
      let my ask you, why do you have math.add before and after all the tanh modules?
      also, what's the purpose of all the parallel tanh wraps, as you call them in the snippet you posted?

      1 Reply Last reply Reply Quote 0
      • ustkU
        ustk
        last edited by ustk

        @clumsybear Well, I just tested different signal chains... I found that it is usable, and gives a different result. I have no idea if it is good to do that or not, but it works... The idea was to make several gain stages.
        The chain nodes (wraps) are not really in parallel as I just use them to test and compare different ideas. They are toggled via a knob so it's quick to implement new ideas. They are all different tests, never working at the same time (you can put a clear at the end to kill the signal). It's easier than creating another DSP, going back and forth...

        Can't help pressing F5 in the forum...

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        • C
          clumsybear
          last edited by

          nice workaround :)

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          • C
            clumsybear
            last edited by

            After testing, everything seems to work as expected. The only thing I would like to try is setting the high pass filter a bit below 20Hz.

            @Christoph-Hart Is there a way to do this, or is 20Hz the lowest we can go with all the filters?

            orangeO 1 Reply Last reply Reply Quote 0
            • Christoph HartC
              Christoph Hart
              last edited by

              I think I‘ve hardcoded 20Hz as lower limit inside the filters. The problem is that the coefficients get really weird as you approach 0Hz.

              1 Reply Last reply Reply Quote 0
              • orangeO
                orange @clumsybear
                last edited by orange

                @clumsybear This is Script FX Biquad Filter. Below 20Hz, it is unstable. Also in about 4Hz, it is shaking :)

                alt text

                develop Branch / XCode 13.1
                macOS Monterey / M1 Max

                1 Reply Last reply Reply Quote 2
                • C
                  clumsybear
                  last edited by

                  Interesting @orange

                  I have a feeling that the purpose of why I'm trying to bias the signal before hitting the tanh module makes the whole process obsolete.

                  The purpose was to generate even harmonics, which works. the problem is that the filter set at 20Hz cancels/filters out even harmonics. Is there another way to generate even harmonics?

                  orangeO 1 Reply Last reply Reply Quote 0
                  • orangeO
                    orange @clumsybear
                    last edited by orange

                    @clumsybear You can bypass filters in the Shape FX module with: ShapeFX.setAttribute(ShapeFX.BypassFilters, true);

                    There is no bypass button in the unit's GUI but there is a parameter for that.

                    HiseSnippet 1096.3oc2W0saaTDEdV6rU0NTDAEj3xUkabkBQ1l1BRHTci+oXQbrU1PK2UMY2isGk0yrZ1YcwBw87.vCFR7Bvi.uAvY10N6LoFKigDUUmax7cNmc+N+O6HoH.RRDRhSkKVDCDmOv0eAWMs8TJiS52g37gtCnIJP5kCcxhXZRBDRbbJ+BMfSk8HY+9ymcBMhxCfBHB4kBV.bJaFSUfNp02whh5QCgKXyLz9ws5GH3sEQhTjOkcqShoAWQm.mQ0pUxk3butgLkP5qnJHg3r2IhvE9SEugmq+KYIrKi.8gFDe7AkC2SDEpYr9+IsmxhBGsxuSHDG2QEQgx4QgCcGvBYWiWDM9nLAdEVXFObJsI50XGomiA81KmdG35GHYwpBIZtsuaeNlnFSwTfIsx0kT5ybbaKPM3pimQuB5IwCWaQsmVu9QdOod8G80Onp9OLUjn7lSkdc56eg223kUWb7DP0c7XHPU6gZ7GtRc8giS.0yUJI6xTETKCImG8XQ3qI4HOkLEzVLNkGnXBtmfelPAC40dT0epZkp+bUuaJZ730JS6IRQTDHWqXckkbSFVimN6RPdD5gQHmVoHFhsyg6uc4vf7.qghBdeNSMLFVdtHKqkk60qjVmbsyZBU3ilnYt1ZTq.5sKhHKS73+8886PUTcc0RLTuXPpXZu0oCLGaXyqxp31ARtRIhwV12pDDaDDgoQTkc2gdjvRAX31pLTWpwSXpEliL9WzxTessLMVm2tkz8.2QLUvz0y2RqguXT61luKG.8.27trBxtmaue3NdZyAqpC7mRiA70q4w8b0M1VLocpbd9.5SXzjSgwJyPlF6b1joVfeKBLBe.lS+OU7FKne42agoFiED2u0v43XD5r3HFehYYj8lHB4bHL0dQzySUhI2XeU1do973TkIZGIatkoCX+n0VNyQZV0xksSHk2tDxZpGNWjpPOb.Emkhua2yRm4iKEC.rbfygH7g65TR2Vmett9rlD9.OL6veg+VJrg9ryRgMVIzrl6v7779tuhNGxFymko+jryiExYdu.3fT27zXCW.3211K.Du0W.XXfBovERJOIVj.MLex2PVSSYc.UJ2V8bHKsztWOz8ZXVhsBroI3HJ25ggma9OVh7GOqKmhIZe.8lvgIAnypicl0JiRiRfWwBUSaXZXAbSS3aVYsks51CiMz+cjKA8++D8+6Kf14lVqImUVwQeFNrB5xmCQ3V1LN9w3Z0wzzH0JT6dpABtHdpfyBrGngiBlLArJhVqCgW.Cu0bAxgsNGh.ZRQeVzu15TFGnR6oq2VwhMku9T2b55oGD389wEGJ+dzEGtM5PwYkuCjouKVwdW7NlQCjhWGj+I.5Vu6mgf9MO6qlqfe9Nd1qAI6CcP6bqebcxLb.9qCBzUGeNFeVuMM2Aa9hcvlGuC17jcvlmtC17k6fMe0FsQu6TeazY40+HvntYeRliS98FxZEH+M14Qj.A
                    

                    develop Branch / XCode 13.1
                    macOS Monterey / M1 Max

                    LindonL 1 Reply Last reply Reply Quote 1
                    • LindonL
                      Lindon @orange
                      last edited by

                      @orange oh nice catch....

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                      • C
                        clumsybear
                        last edited by clumsybear

                        cool @orange , didn't know about that. it could come in handy as a workaround to the scriptnode signal flow. But I guess I'd have to deal with the same peak in the low end which is produced by biasing the signal in the first place.

                        I was actually talking about generating even harmonics in another way then biasing the signal before hitting a hyperbolic transfer function.
                        Like, tanh produces odd harmonics
                        What produces even harmonics?

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                        • C
                          clumsybear
                          last edited by clumsybear

                          Finally found a way to produce them even harmonics.

                          • Apply transfer function with positive bias offset to signal A
                          • Apply transfer function with negative bias offset to signal B
                          • Flip the phase of one signal
                          • Add the fundamental
                          • Mix signals back together

                          I want to create this in scriptnode. how can the math.add node act as a positive/negative bias.

                          lalalandsynthL 1 Reply Last reply Reply Quote 0
                          • Christoph HartC
                            Christoph Hart
                            last edited by

                            Right click on the knob to change the range:

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                            HISE | Docs

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                            (docs.hise.audio)

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                            • C
                              clumsybear
                              last edited by

                              @Christoph-Hart alright, thanks.
                              Is there a way to flip the phase of a chain in scriptnode?

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                              • Christoph HartC
                                Christoph Hart
                                last edited by

                                Multiply with -1 :)

                                C 1 Reply Last reply Reply Quote 2
                                • C
                                  clumsybear @Christoph Hart
                                  last edited by

                                  @Christoph-Hart easy enough :)

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                                  • lalalandsynthL
                                    lalalandsynth @clumsybear
                                    last edited by

                                    @clumsybear Wouldnt that be negative bias on signal A and no bias on Signal B ?

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                                    • lalalandsynthL
                                      lalalandsynth
                                      last edited by

                                      I did this configuration , works very well, except that I get a loud Dc thump when I push play in a DAW . And only when I push play .

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