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    How to build SNEX Playground?

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    • CasmatC
      Casmat @d.healey
      last edited by

      @d-healey ooh, how do I work directly in hise? I tried pressing the snex popup button in the snex shaper node in scriptnode to edit, but it does nothing

      i make music

      d.healeyD 1 Reply Last reply Reply Quote 0
      • 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
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