Skip to main content ↑ ↓

Notice

Please note that most of the software linked on this forum is likely to be safe to use. If you are unsure, feel free to ask in the relevant topics, or send a private message to an administrator or moderator. To help curb the problems of false positives, or in the event that you do find actual malware, you can contribute through the article linked here.
Topic: compare audio tracks to extract differences (Read 5077 times) previous topic - next topic
0 Members and 1 Guest are viewing this topic.

compare audio tracks to extract differences

Is it posible to compare two audio tracks and extract differences between them?

I muxed movie soundtrack on dvd with translator voice. After some time I discovered the translation in some places is hardly audiable. The source of translator voice is lost.

Is there a plugin or program which removes noise from one audio when exact noise is given in another.

compare audio tracks to extract differences

Reply #1 –
Audacity has noise removal option with support of noise profile.
You basically need to substract one audio stream from another (you must have one of the unmixed streams, with translator voice only or with movie soundtrack only).
Is it a multi-channel movie?

compare audio tracks to extract differences

Reply #2 –
If I understand you correctly you have 2 audio files. First one with signal A and the second with signals A + B. You would like to remove the signal A from the second one. In that case all you need to do is invert the phase of the first file and mix it with the second one. Most audio editors should be able to do it (no need for a "fancy" noise removal feature).

compare audio tracks to extract differences

Reply #3 –
Quote
If I understand you correctly you have 2 audio files. First one with signal A and the second with signals A + B. You would like to remove the signal A from the second one.
[a href="index.php?act=findpost&pid=344262"][{POST_SNAPBACK}][/a]


Well, you explained my situation much better then me  . Now I understund my idea of going noise removal way was "fancy".

I forgot to mention my stream "A + B" is compressed to MPA. "A" is left untouched Ac3. So the "noise" part will not be a bit by bit identical. It will be just very similar.

I opened "A" in CoolEdit. May I have a hint, where is the Invert function? Maybe I can just press Ctrl+I like in Photoshop to invert the image? (Just kidding, I do not want to exploit your patience.)

Edit: I found Invert function in Edit View: Effects > Invert.

compare audio tracks to extract differences

Reply #4 –
Ura, ura! I did it!
The knockout effect is not 100% because A+B stream was normalized and I also had to synchronize them (I do not know why A+B MPA version had some 50ms click in the begining). The original sound is still audiable, but it is 50% lower and do not wipe out the tanslator voice.
Thank you, thank you, I thoght at first it will be impossible, but I knew I had to give a try to forums.