create a moving sinus wave

[Ryan Hill]

Step 1. Get a picture of a sine wav.
Step 2. Animate its position value.

Could you explain your question better as to what you are having difficulty with?

[Kusimz]

i want to animate the waveform. so how could i do this with an expression or is there a plugin

[Ryan Hill]

In what way do you want to animate it?

[Kusimz]

I want to create seeveral different sinus waves. they should work like an oszillator.

[Ryan Hill]

There is an “Audio Waveform” filter. If you import the sound of a sine wave, you might get what you’re looking for.

Also, you could take a dot, apply a sin expression to its vertical position. Then use particle playground to get it to emit particles that float to the left, maybe? Or echo is another approach.

Or, you could create a whole image of the wave form in photoshop, import it, apply a track matte that keeps the right half hidden while you move the layer to the left. Then duplicate the layer and show only a thin vertical stripe of it and apply glow, so you have the glowing dot.

Or, you could apply a sin expression to something’s vertical position and a constant horizontal motion; convert the expression to keyframes, then copy the keyframes into a mask and apply stroke to the mask, then use that as above instead of a photoshop image.