posted 14 November 2011 04:43            

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what would be a simple way to fold values to a range?

Rather than clipTo01 , a way to make a value that goes past the toplimit, fold back down by the excess ammount, like aliasing does with nyquist.

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posted 14 November 2011 09:45            

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Someone at SSC gave me this code which does just what you want at audio rate
http://www.symbolicsound.com/cgi-bin/forumdisplay.cgi?action=displayprivate&number=7&topic=000419

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posted 14 November 2011 12:47            

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Hi Cristian
If your using Capybara then Petes DSP has a flip module at sampler rate.
Pete

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posted 25 February 2012 08:28            

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how about a wrap in capytalk?

for processing pitches for example when the go off the top of the nn scale, that the appear at the bottom again

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posted 25 February 2012 09:35            

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To wrap from the top of the MIDI pitch range, starting over at 0 again you could use:

!KeyNumber mod: 128

To start inverting once you get above a certain pitch you could try something like:

((!KeyNumber gt: !MaxNumber) true: (2 * !MaxNumber - !KeyNumber) false: !KeyNumber) nn

That way, when you got above !MaxNumber it would subtract the difference between the incoming pitch and !MaxNumber from the incoming pitch.

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posted 25 February 2012 14:51            

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ReflectiveWrappingSTG.kym

Here is a SoundToGlobalController with an expression in it that will wrap (with reflection) the input to fall between the minimum and maximum values.

This is a refinement of one of the ideas of the previous response that will continue to wrap, even if your input is more than twice the maximum. It replaces the comparison with mod: and min:.

Here is the expression:

| range wrap |

range := !Max - !Min.
wrap := !In - !Min mod: 2 * range.

(wrap min: 2 * range - wrap) + !Min

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posted 25 February 2012 14:54            

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If you ever need to do this kind of 'fold-over' operation to the signal at the sampling rate, you can use the Prototype called: 'InputOutputCharacteristic Wave folding Waveshaper'. It's in the Distortion & Waveshaping category.

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posted 29 February 2012 10:02            

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thank you SSC !

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