AC3 to individual tracks

What is the best way to divide AC3 audio into the 5 or 6 tracks?

Mac OS X (10.6.8), MacPro Early 2008 10GB

Posted on Aug 5, 2012 4:09 AM

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7 replies

Aug 6, 2012 4:45 PM in response to Detlef Kretschmer

what's the hard way? getting the original stems? ac3 files are heavily compressed and decompressing them (which will be necessary to edit them) and recompressing them will give you a serious quality hit. Have you tried dropping the ac3 file into compressor and seeing if it can convert the individual tracks to 16bit 48ik aiffs without compression. If it doesn't do some googling to see if there are any programs that will do it, unless you're too lazy to do that.

Aug 6, 2012 5:06 PM in response to Michael Grenadier

The hard way:

1) Importing in Audacity - does a good job. The problem is finding out which channel is which L-R and Ls-Rs.

2) Opening with Quicktime (7 and Pro), disabling every channel except one and exporting this one mono. Repeat 6 times.

3) Importing it into FCP - problem see 1, also not always synchrone.


Compressor can make an AC3 file but cannot digest one as input - even though it accepts it.


Googling didn't help - there are limits even to my lazyness 😁

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AC3 to individual tracks

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