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    Rms type or Cosine type Crossfade Curves

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    • David HealeyD
      David Healey @Jeetender
      last edited by

      @Jeetender Have you tried using the send container and send effect for this instead?

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      • J
        Jeetender @David Healey
        last edited by

        @David-Healey no i did not, but the thing is there, i still have to balance between the send or wet with Dry. there is no direct wet dry balance in the modules...

        David HealeyD griffinboyG 2 Replies Last reply Reply Quote 0
        • David HealeyD
          David Healey @Jeetender
          last edited by

          @Jeetender What about setting the Gain of the SimpleGain where you want it and using a CC modulator to control the actual value (you can connect the Default value knob to a UI knob, you don't actually need to use a CC). Then you could set any shape you want using the modulation tables.

          611b63e8-5067-43ea-baa5-1cd17ee08750-image.png

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          • griffinboyG
            griffinboy @Jeetender
            last edited by

            @Jeetender

            Wet / Dry balance is done using a sin / cosine curve usually.
            You don't need to do any RMS calculations for an equal power curve.

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            • griffinboyG
              griffinboy @Jeetender
              last edited by griffinboy

              @Jeetender

              This is pseudo code.
              It's something like this

              // Equal-power wet/dry crossfade (pseudocode)
              
              // knob range
              value = 0 to 127
              
              // normalize
              t = value / 127.0
              
              
              // equal-power law
              // sin/cos keep total power constant
              wet_lin = sin(t * PI * 0.5)
              dry_lin = cos(t * PI * 0.5)
              
              
              // linear → dB
              // dB = 20 * log10(gain)
              // log10(x) = ln(x) / ln(10)
              
              wet_db = 20 * ln(wet_lin) / ln(10)
              dry_db = 20 * ln(dry_lin) / ln(10)
              
              
              // clamp near zero (avoid -inf)
              if (wet_lin < 0.00001) wet_db = -100
              if (dry_lin < 0.00001) dry_db = -100
              
              
              // apply
              WET.Gain = wet_db
              DRY.Gain = dry_db
              
              
              
              /*
              Behaviour:
              
              t=0
              dry=1.0  (0 dB)
              wet=0.0  (-inf)
              
              t=0.5
              dry≈0.707 (-3 dB)
              wet≈0.707 (-3 dB)
              
              Summed signal power stays constant across the crossfade,
              so the centre position does not sound quieter.
              
              

              This is the kind of question that AI can help you understand.
              Ask chat gpt about it until you get why it works!

              J 1 Reply Last reply Reply Quote 0
              • J
                Jeetender @David Healey
                last edited by

                @David-Healey this works good but still the same issue, at 50% the volume is not constant.

                said in Rms type or Cosine type Crossfade Curves:

                @Jeetender What about setting the Gain of the SimpleGain where you want it and using a CC modulator to control the actual value (you can connect the Default value knob to a UI knob, you don't actually need to use a CC). Then you could set any shape you want using the modulation tables.

                611b63e8-5067-43ea-baa5-1cd17ee08750-image.png

                David HealeyD 1 Reply Last reply Reply Quote 0
                • David HealeyD
                  David Healey @Jeetender
                  last edited by

                  @Jeetender said in Rms type or Cosine type Crossfade Curves:

                  this works good but still the same issue, at 50% the volume is not constant.

                  Have you used an equal power curve?

                  Free HISE Bootcamp Full Course for beginners.
                  YouTube Channel - Public HISE tutorials
                  My Patreon - HISE tutorials

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                  • J
                    Jeetender @griffinboy
                    last edited by

                    @griffinboy chatgpt or other bots aren't familiar with HISE coding yet i believe.. they just get confused with parameters.

                    said in Rms type or Cosine type Crossfade Curves:

                    @Jeetender

                    This is pseudo code.
                    It's something like this

                    // Equal-power wet/dry crossfade (pseudocode)
                    
                    // knob range
                    value = 0 to 127
                    
                    // normalize
                    t = value / 127.0
                    
                    
                    // equal-power law
                    // sin/cos keep total power constant
                    wet_lin = sin(t * PI * 0.5)
                    dry_lin = cos(t * PI * 0.5)
                    
                    
                    // linear → dB
                    // dB = 20 * log10(gain)
                    // log10(x) = ln(x) / ln(10)
                    
                    wet_db = 20 * ln(wet_lin) / ln(10)
                    dry_db = 20 * ln(dry_lin) / ln(10)
                    
                    
                    // clamp near zero (avoid -inf)
                    if (wet_lin < 0.00001) wet_db = -100
                    if (dry_lin < 0.00001) dry_db = -100
                    
                    
                    // apply
                    WET.Gain = wet_db
                    DRY.Gain = dry_db
                    
                    
                    
                    /*
                    Behaviour:
                    
                    t=0
                    dry=1.0  (0 dB)
                    wet=0.0  (-inf)
                    
                    t=0.5
                    dry≈0.707 (-3 dB)
                    wet≈0.707 (-3 dB)
                    
                    Summed signal power stays constant across the crossfade,
                    so the centre position does not sound quieter.
                    
                    

                    This is the kind of question that AI can help you understand.
                    Ask chat gpt about it until you get why it works!

                    griffinboyG 1 Reply Last reply Reply Quote 0
                    • griffinboyG
                      griffinboy @Jeetender
                      last edited by

                      @Jeetender

                      Right but the math works the same way.
                      All you need to do is find the right hise functions in the API for the math calls.

                      1 Reply Last reply Reply Quote 0
                      • LindonL
                        Lindon @Jeetender
                        last edited by Lindon

                        @Jeetender eaiest way is ro use a scriptnode network and a xfade module...

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                        www.channelrobot.com

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