motion graphics eXchange

Controlling sound volume without dB

Thumbnail for: Controlling sound volume without dB
A few simple expressions to convert from dB to volume-Percentages, this way sound will respond more like opacity...
After Effects CS3
Useful things
Presets (ffx)

Views: 8933
visit |  download |  share this  error? 
It's a pain to use decibels to animate sound-Volume, especially for a fade-out or cross-fade.

These are animation presets that you should apply to a sound-layer.
A few sliders and an expression will be added.

With the Volume Slider you can easily set and animate the sound-Volume in percentages (eg. 200% = twice as loud, or fadeout from 100-0)

The Volume + Pan version also adds a slider that Balances/Pans the sound from left (-50) to right (+50)

I noticed that After Effects' Stereo Mixer plugin uses a "Panning Law" of -6 dB, most DAWs use -3 or -4.5.
there's a line in my script that lets you toggle between 0, -3, -4.5 or -6dB pan law.

(for those of us who don't know what a pan law is: basically it's a formula that controls that sounds in the center don't sound louder than sounds that are panned hard left or right, this also prevents a 0dB stereo signal from clipping when it's summed to mono)

by Filip Vandueren


volume, sound, control, decibel, percent, Panning Law

(Min. Version: After Effects CS3, Category: Useful things, Type: Presets (ffx))
posted by MaxX on May 10, 2010


Related topics:

Ducking Audio Preset/Expression

Thumbnail for: Ducking Audio Preset/Expression
A great time-saving preset to "duck"(fade in/out) a music layer based on a voice over.
"Ducking - Audio Terms Explained - Process of automatic compression, eg when the announcer's voice signal causes the level of music to be attenuated."(from
After Effects CS3
Useful things
Presets (ffx)

Views: 7004
posted by MicGyver on Oct 25, 2009

CountdownTimer Preset

Thumbnail for: CountdownTimer Preset
The CountdownTimer preset uses expressions to make it easier for you to create countdowns.
After Effects CS4
Useful things
Presets (ffx)

Views: 25241
posted by Trent Armstrong on Oct 15, 2010

Camera FocusControl

Thumbnail for: Camera FocusControl
Interactively control camera focus distance.
The camera will focus wherever your null or solid happens to sit. This expression is golden when you're doing a lot of Depth of Field work.
After Effects 6

Views: 9504
posted by peter17 on Nov 08, 2008



follow us on in touch on facebook



Full length video training series presented by motion graphics industry professionals. Click here to visit Motionworks website!