Bad AC3 file...

[canuckerfan]

okay... i've got a 5.1 AC3 file here which is pretty messed up. basically I want to convert it to mp3. but here's the problem... its gots some serious noise issues and all 5 channels (except of course the LFE) sound EXACTLY the same - and my ears are pretty sensitive. this is hinting me that the source was originally mono and after doing a little research i've confirmed that the source was mono and was smoshed up into a 5.1 mix. so this is the workflow that i've proposed...

1) convert the ac3 file into a 5.1 wav file. then demux one of either R, L, C, RR, LR.
2) remove noise/etc with goldwave
3) convert single wav mono file into mono mp3.

but my problem is what happens to the LFE channel? does that data get lost when I go to mp3 since I'm only working with one of the channels? any input is appreciated.

[tebasuna51]

If you think the LFE channel contain data not present in the others channels you can mix the LFE with your clean mono wav.

Maybe the LFE channel was obtained extracting the low frequencies from the original and now you need restoring the data.

[canuckerfan]

^so that would result in one file which contains data of both the LFE and mono channel, correct? if that's the case, I will read up on methods for this procedure. any hints?

[tebasuna51]

With Goldwave you can use Copy over LFE channel and Mix over the cleaned mono wav. If there are clips you can reduce the volume before mix.