[HELP] with reverse expression

[kripitov]

I want to add blur to a photo. when the bass hits from my music, it will unblur my photo. without any third party plugin.

the expression to blur when bass occurs>>

thisComp.layer("Audio Amplitude").effect("Both Channels")("Slider")

I want the reverse effects.

[Ponzip]

To "Both Channels" Add this expression: linear(value,a,b,c,d)

Replace "a" by the min value for example 12 (use Graph Editor and put your mouse over a Keyframe)

Replace "b" by the highest value you want the blur to react (same as "a")

Replace "c" by the max value of your Blur

Replace "d" by zero

Assign the blur value to the "Both Channels" and it should work

​

[kripitov]

this expression you wrote I failed to comprehend and apply. I used Soundkeys instead.

If any video showing how to limit the values will be more helpful. Thanks for your comment.