expressions for audio…

[Kalleheikki Kannisto]

The usual handling is to make the music lower when there is voiceover.

But, to do what you’re asking: You could convert audio to keyframes for the music channel, add a Smooth expression to the keyframes and link the volume control of your voice to those keyframes. I suspect it is going to sound very uneven; at least you’ll need to set a minimum level for the voice so it doesn’t disappear when the music goes low (with a Math.max expression).

[Luis Garcia]

Thanks for your answer Kalle Kannisto!! Could you tell me how would be the expression to set a minimun level of music?

How would be the smooth expression?

I am very sorry with this questions but I am not clever with expressions … Sorry!

Thanks in advance!

[Kalleheikki Kannisto]

This is how it could be set up.

For Audio Amplitude (created from music), Both Channels:

smooth(.1,5)// 5 samples over .1 seconds

More samples over longer time gives you progressively smoother results.

For Audio Levels of your voice channel:

minvol = -6;//minimum volume level
offset = -6;// offset value for volume
mult = .5;//multiplier for voice volume
vol = Math.max(minvol,thisComp.layer("Audio Amplitude").effect("Both Channels")("Slider")*mult+offset);
[vol, vol]

Doesn’t have to be that complex, but this’ll give you some control over how much the volume gets changed.

—

When you’ve tried that, here’s the likely more workable option of ducking the music when there is voice.

Create the Audio Amplitude from the voice, put the smooth expression on it, then use this for music volume setting:

maxvol = -6;//maximum volume level
offset = -6;// offset value for volume
mult = .5;//multiplier for music volume ducking amount
vol = Math.min(maxvol, offset-thisComp.layer("Audio Amplitude").effect("Both Channels")("Slider")*mult);
[vol, vol]

[Luis Garcia]

A lot of thanks!!!! I will prove it and feedback you!!!

You are great Kalle….

Thanks! Thanks! Thanks!

[Tom Granberg]

I having trouble making this work in AE2020