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expression: audio to control CC radial fast blur
Hello,
Any tips for an expression that will enable the CC radial fast blur effect to be controlled by audio amplitude (both sliders)?I’ve tried modifying this to make an adjustable expression but no luck:
minAudio =2;
maxAudio = 25;
minStretch = 90;//minimum in percent of scale
maxStretch = 200;//maximum in percent of scaleaudioLev = thisComp.layer(“Audio Amplitude”).effect(“Both Channels”)(“Slider”);
s = linear(audioLev, minAudio, maxAudio, minStretch, maxStretch);
[s,s]
any help would be much appreciated!
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3 Replies
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Are you using the expression to control the Amount parameter? If so, you just need to delete the last line ([s,s]).
You’ll probably want to adjust the minStretch and maxStretch values as well.
Dan
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Many thanks Dan!
That worked well. You made my day!2 questions if you have time to answer…
Does ‘stretch’ always refer to the amount within expressions? (I thought it had something to do with scale…)
also, can you tell me what the [s,s] was for?
Cheers,
QB -
That expression was designed to manipulate a layer’s Scale property in response to audio amplitude. [s,s] causes the x and y scale to be the same, so the layer scales uniformly. minStretch and maxStretch are just arbitrary variable names for the resulting min and max values of the property hosting the expression. “stretch” in this case is related to the expression’s initial purpose as a Scale expression. This would work just as well and probably makes more sense for your application:
minAudio = 2;
maxAudio = 25;
minBlur = 90;
maxBlur = 200;audioLev = thisComp.layer(“Audio Amplitude”).effect(“Both Channels”)(“Slider”);
linear(audioLev, minAudio, maxAudio, minBlur, maxBlur);Dan
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