Audio keyframes seperate

[aza347675389le7]

When I try to edit the audio keyframs, the left and right always seperate, and I can't find anything online about it

[Rick Gerard]

The red line is the Right Channel, and the green one is the Left. Unfortunately, when using the graph editor, you can't grab both handles at the same time, so you have to match the position of the Bezier handle visually. It's the same as grabbing one position or scale property when you try to edit the values on the Graph Editor. 

A common way to ease in or out of a fade would be to use the Keyframe Assistant.

If you really need to finesse an audio edit in After Effects, the best, and by far the fastest solution, would be to select all of the audio layers and choose the Edit/Edit in the Audition menu. If you are working on more than one shot in a comp (Comps are usually only one shot, one thought, or, at most, one short sequence) and trying to edit a movie, the most efficient workflow is to render your AE comps and do the final editing in Premiere Pro, including adding sound effects and doing the final mix. If the mix requires more finessing than you can get in Premiere Pro, you can also edit a Premiere sequence in Adobe Audition. I don't know any pro that would spend much time fine-tuning an audio fade using the graph editor.

The only way I know of matching the curve would be to add an expression control slider to the layer, tie the left and right channels to the slider, and then edit the curve on the slider control.

[aza347675389le7]

Now why would they just not let you edit both together? Thats completely unintuitive and downright stupid

[Rick Gerard]

Stereo audio is a two-variable array with no switch to link the values. It is unique because you won't get two parameters unless you offset the left and right channels. There is no third value in the array for Both channels. That's why you get two curves when adding bezier handles in the Graph Editor. It's the same as a mixer. The sliders (controls) for the left and right stereo channels are separate unless you patch the left and right channels to a Stereo Mixer. 

If you want to link the values so only one bezier handle controls the stereo level changes over time, add this expression to the Audio Levels:

[value[0], value[0]]

This will defeat the left and right channel controls, effectively matching the levels of both channels. It's not a very good way to control a stereo mix, but it will give you the same values for left and right channels. You will see a bright and darker green curve, but only the bright green line will modify the levels.

AE is not an audio effects editor, so the ability to add a mix bus to the audio mix is not surprising. If you need that, just use Dynamic Link to edit your audio in Audition or do the final sound mix in Premiere Pro.