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    How to build SNEX Playground?

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

      @Casmat Click the 3 dots at the left, create a new file. The SNEX editor will open in the same panel as the script editor.

      Libre Wave - Freedom respecting instruments and effects
      My Patreon - HISE tutorials
      YouTube Channel - Public HISE tutorials

      Christoph HartC 1 Reply Last reply Reply Quote 0
      • Christoph HartC
        Christoph Hart @d.healey
        last edited by

        @d-healey the SNEX playground is still functional but the main use case for it is me making unit tests for testing specific SNEX language features.

        CasmatC d.healeyD 2 Replies Last reply Reply Quote 0
        • CasmatC
          Casmat @Christoph Hart
          last edited by Casmat

          @Christoph-Hart @d-healey Nice! I found this code on musicdsp.org:

          x < a:
            f(x) = x
          x > a:
            f(x) = a + (x-a)/(1+((x-a)/(1-a))^2)
          x > 1:
            f(x) = (a+1)/2
          

          How would I turn this into something snex can understand? Wouldn't it use if statements and how should X and A be swapped? It's supposed to make a soft saturation

          Thanks!

          i make music

          ustkU 1 Reply Last reply Reply Quote 0
          • d.healeyD
            d.healey @Christoph Hart
            last edited by

            @Christoph-Hart Oh I think I was thinking of the SNEX workbench.

            Libre Wave - Freedom respecting instruments and effects
            My Patreon - HISE tutorials
            YouTube Channel - Public HISE tutorials

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

              @Casmat said in How to build SNEX Playground?:

              x < a:
              f(x) = x
              x > a:
              f(x) = a + (x-a)/(1+((x-a)/(1-a))^2)
              x > 1:
              f(x) = (a+1)/2

              This translates to something like:

              float out = 0.0;
              
              if (x < a)
                 out = x;
              else if (x > a)
                 out = a + (x - a) / (1.0 + Math.sqr((x - a) / (1.0 - a)));
              else if (x > 1)
                 out = (a + 1.0) / 2.0;
              

              Although it can probably be optimised depending on the use case...

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

              CasmatC 1 Reply Last reply Reply Quote 0
              • CasmatC
                Casmat @ustk
                last edited by

                @ustk I was trying to write it out and got this:

                	float getSample(float input, float a)
                	{
                		if(input < a)
                		{
                			return input;
                		}
                		else if(input > 1)
                		{
                			return (a + 1) / 2;
                		}
                		else
                		{
                			return a + (input - a) / (1 + ((input - a) / (1 - a))**2);
                		}
                	}
                

                definitely wrong in all sorts of cases, I haven't ventured into dsp code, and this is by far the deepest, so thanks for helping! Have one more request, how in the world do I put this into the snex code editor? I tried reading the docs on snex, but was a bit stumped. I'm trying to build a saturation in a snex shaper node with one "Saturation" control. How do I continue?

                Thanks a ton!

                i make music

                ustkU 3 Replies Last reply Reply Quote 0
                • ustkU
                  ustk @Casmat
                  last edited by

                  @Casmat The implementation of your function looks like this:

                  	float getSample(float s)
                  	{
                  		//return your stuff here
                  	}
                  	
                  	
                  	template <typename ProcessDataType> void process(ProcessDataType& data)
                  	{
                  		auto f = data.toFrameData();
                  		
                  		while (f.next())
                  		{
                  			for (auto& s: f)
                  				s = getSample(s);
                  		}
                  	}
                  	
                  	
                  	template <int C> void processFrame(span<float, C>& data)
                  	{
                  		for(auto& s: data)
                  			s = getSample(s);
                  	}
                  

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

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

                    @Casmat And as I wrote above, the constants should be float if you don't want to get casting errors

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

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                    • ustkU
                      ustk @Casmat
                      last edited by

                      @Casmat And one other thing, have you tried to plot your formula to see what you get out from it? Because it's going over the -1/+1 gain factor so you either need to scale the output or rework the formula...

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

                      CasmatC 1 Reply Last reply Reply Quote 0
                      • CasmatC
                        Casmat @ustk
                        last edited by Casmat

                        @ustk thanks for the info! I don’t think ive done anything with the formula, i found it on music dsp and I was clueless from the start on how to get it to be a simple saturator, is the gain factor related to the gain matching on a saturator?

                        Edit: so the gain factor is x?

                        i make music

                        ustkU 2 Replies Last reply Reply Quote 0
                        • ustkU
                          ustk @Casmat
                          last edited by

                          @Casmat So I imagine a is your gain, right?
                          What do you get as a result? Is it at least sounding "something"?
                          Does the level need to be tamed a bit perhaps?

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

                          CasmatC 1 Reply Last reply Reply Quote 0
                          • CasmatC
                            Casmat @ustk
                            last edited by

                            @ustk as far as I know when looking at it, I thought that x was the input signal and a was the saturation amount

                            i make music

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                            • ustkU
                              ustk @Casmat
                              last edited by

                              @Casmat said in How to build SNEX Playground?:

                              Edit: so the gain factor is x?

                              f(x) means the it's the output, so a should be the gain

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

                              CasmatC 1 Reply Last reply Reply Quote 0
                              • CasmatC
                                Casmat @ustk
                                last edited by Casmat

                                @ustk ohh yeah! Polynomials (or maybe not)!

                                i make music

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

                                  @Casmat At first, does it look the way you want?

                                  ![Screenshot 2023-08-18 at 20.47.17.png](Imgur is temporarily over capacity. Please try again later.)

                                  EDIT @Christoph-Hart @Dominik-Mayer Apparently there's still this Imgur over capacity issue that prevents us to see images...

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

                                  CasmatC 1 Reply Last reply Reply Quote 0
                                  • CasmatC
                                    Casmat @ustk
                                    last edited by Casmat

                                    @ustk why was there an float s in the arguments? And I should be declaring a as a variable, right? I put the code you gave

                                    if (x < a)
                                       out = x;
                                    else if (x > a)
                                       out = a + (x - a) / (1.0 + Math.sqr((x - a) / (1.0 - a)));
                                    else if (x > 1)
                                       out = (a + 1.0) / 2.0;
                                    

                                    In the get sample func?

                                    Edit: didn’t see your post yet, the img seems broken

                                    i make music

                                    Christoph HartC 1 Reply Last reply Reply Quote 0
                                    • CasmatC
                                      Casmat @ustk
                                      last edited by Casmat

                                      @ustk try using imgbb.com

                                      i make music

                                      ustkU 2 Replies Last reply Reply Quote 0
                                      • Christoph HartC
                                        Christoph Hart @Casmat
                                        last edited by

                                        @Casmat if imgur is over capacity then there‘s nothing we can do except for stop uploading images :)

                                        ustkU 1 Reply Last reply Reply Quote 2
                                        • ustkU
                                          ustk @Christoph Hart
                                          last edited by

                                          @Christoph-Hart Yeah I though it was somehow related to the forum... Or use another provider 😛

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

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

                                            @Casmat

                                            SOS image provider

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

                                            1 Reply Last reply Reply Quote 0
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