Is 5.1 surround sound on AE&? If not, Feature Request?

[Lessevolvedman]

amen to that

[Filip Vandueren]

Well, if you disregard stuff like the doppler effect and ambience, and just want a mixdown of the relative levels in relation to some virtual microphones, it wouldn’t be too hard to do right now.

Just duplicate all the layers that have sound and pre-comp them.
duplicate that pre-comp once for every speaker and then write a simple expression that calculates the distance from the layer to the position of the mic, subtract that value from the current dB-level.
Add in a damping-co

[Filip Vandueren]

Well, if you disregard stuff like the doppler effect and ambience, and just want a mixdown of the relative levels in relation to some virtual microphones, it wouldn’t be too hard to do right now.

Just duplicate all the layers that have sound and pre-comp them.
duplicate that pre-comp once for every speaker and then write a simple expression that calculates the distance from the layer to the position of the mic, subtract that value from the current dB-level.
Add in a damping-co

[Filip Vandueren]

Decided to have some fun:

here’s the gist of my idea for stereo, with even some doppler added 😎

the audio is a motor at constant speed,
the distance from “+” to L and from “+” to R is calculated and used to lower the volumes and is also added to the time-remapping.
It’s factored by a “speed of sound”, so you get accurate delays and hence automatically a doppler if it moves.

for 5.1, you would do the exact same thing, place some more ‘mics’.
Perhaps use a “layer”-expression-control on a null-layer, to select which mike you want to hear.
Let all the audio-expressions reference that layer-selector, and you get a more elegant solution.

project-files are here:

https://www.vandueren.be/forumstuff/doppler/

BTW, this works in 3D.

[Mike Clasby]

Very cool. I’ll give it an under the hood look, because I don’t really now all that’s going on from the text. hanks for posting the aep.

[Lessevolvedman]

double thanx filip
i got some disecting to do now

[Filip Vandueren]

I made a new project with a 7.1 setup, lol
haven’t tested the final output, and my solution for doppler turns out to be not that full-proof: you’ll hear a sudden speed change to normal when the layer suddenly stops. Easing helps.
But anyway, that doppler thing is easily switched off by turning off the time-remapping-expression

Here’s the new project, it works with a “select mic” layer, so you can hear/render one mic at a time, and it’s set-up in 3D,
I’d love to hear some feedback if someone winds up doing a monitoring test. (well not actual feedback 😉 )

https://www.vandueren.be/forumstuff/doppler/sevendot1.aep

some tips for testing:
1) to choose a “speed of sound”-value: (only needed fpr the doppler effect)
imagine at what speed your layer is moving, for example 36 mph.
Look at the pixel-speed, for example: 287 px/s
now google – no really:

speed of sound * 287/36 in mph
link:speed of sound * 287/36 in mph

and that’s your physically accurate speed of sound in pixels/second (now if only I could factor out sea-level 😉 )

2) If you parent the soundlayers, or the mics to a null or a camera or whatever, the expressions have to be rewritten (toWorld…), because they assume worldspace co

[Lessevolvedman]

haha GO FILIP GO!!