After Effects Tips & Tricks - Sound Wave

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Hi, guys! Today we want to share with you a versatile way to create a Sound Wave with Shape Layers. And the good news is that you can loop this wave as well using the following expression
freq = 6; //frequency
amp = 500; //amplitude
loopTime = 3; //loop duration in sec
t = time % loopTime;
wiggle1 = wiggle(freq, amp, 1, 0.5, t);
wiggle2 = wiggle(freq, amp, 1, 0.5, t - loopTime);
linear(t, 0, loopTime, wiggle1, wiggle2)
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