Audacity Forum

Assuming the following situation:

-2 stereo tracks
-each has the same background music/sounds
-one has English spoken words mixed in, other has another language mixed in

is there a way to analyze/process/separate the common background music/sounds based on
those two stereo inputs?

thanks!

Kn0cK0ut plugin may be worth a try , but don't get your hopes up.
[ If the voices are simultaneous there will be occasionally be common frequencies within the speech, even though they are in different languages, those sounds will also end up in the "common" result ].

Trebor wrote:Kn0cK0ut plugin may be worth a try , but don't get your hopes up.
[ If the voices are simultaneous there will be occasionally be common frequencies within the speech, even though they are in different languages, those sounds will also end up in the "common" result ].

I don't see how a center-channel remover/isolator is going to help me here. Are you sure you understood my initial question? or maybe I didn't understand what you meant when you suggested knockout plugin, but last time I checked, I don't think it can do what I am looking for.

atenzor wrote:I don't see how a center-channel remover/isolator is going to help me here.

Combine the two left channels as a stereo-pair, then and apply a centre-isolator to that pair, the result will be a mono track, consisting of what is common to the two left channels. Repeat with the two right channels.

atenzor wrote: I don't think it can do what I am looking for.

You may very well be right : where the two different voices coincide their common-frequency-content will be isolated too.

Trebor wrote:

atenzor wrote:I don't see how a center-channel remover/isolator is going to help me here.

Combine the two left channels as a stereo-pair, then and apply a centre-isolator to that pair, the result will be a mono track, consisting of what is common to the two left channels. Repeat with the two right channels.

atenzor wrote: I don't think it can do what I am looking for.

You may very well be right : where the two different voices coincide their common-frequency-content will be isolated too.

but the problem is they only share the same background music, HOWEVER, not at the same amplitude... so this trick might not work if it assumes both background music levels will be the same amplitude? if not, i could try it and see what happens...

atenzor wrote: ... but the problem is they only share the same background music, HOWEVER, not at the same amplitude... so this trick might not work if it assumes both background music levels will be the same amplitude? ...

The discriminating-factor the kn0ck0ut plugin uses is frequency [spectral] , not amplitude.
[ Nor does the phase have to exactly match, as is the case with other isolation methods ].

Kn0ck0ut does include bubbly digital processing artifacts : so the result is not studio-quality.

@Trebor

can I use 0.8 version?

I don't have Linux for LV2 and not good with compiling code from source. Is there a way to use that newer version under Windows? would be awesome!

atenzor wrote:@Trebor
can I use 0.8 version?
I don't have Linux for LV2 and not good with compiling code from source. Is there a way to use that newer version under Windows? would be awesome!

I've only ever used kn0ck0ut on Windows, just a VST plugin. I've never attempted to use kn0ck0ut on Linux.
My copy of kn0ck0ut probably isn't the latest ...
Again don't get your hopes up, here is a typical result of Kn0ck0ut : it sounds computery ... https://youtu.be/KDV0WQRO0tE?t=25s

Trebor wrote:

atenzor wrote:@Trebor
can I use 0.8 version?
I don't have Linux for LV2 and not good with compiling code from source. Is there a way to use that newer version under Windows? would be awesome!

I've only ever used kn0ck0ut on Windows, just a VST plugin. I've never attempted to use kn0ck0ut on Linux.
My copy of kn0ck0ut probably isn't the latest ...

The attachment This is the copy of Kn0ck0ut I have (on Windows).png is no longer available

Again don't get your hopes up, here is a typical result of Kn0ck0ut : it sounds computery ... https://youtu.be/KDV0WQRO0tE?t=25s

Trebor, are you aware that the next version includes the new "Vocal Reduction and Isolation" plug-in?

It is e.g. available in the current RC-3 download of Audacity 2.1.1.

I've recorded the beginning of the tutorial you've linked to.
The original audio track is only played for a little while and the guy keeps talking over it.
Anyways, the second half is the isolated version (strength 50, normalized).
The results are comparable to knockout, I should think, the more as the source is far from being ideal.
Cheers
Robert

Robert J. H. wrote:

Trebor wrote:

atenzor wrote:@Trebor
can I use 0.8 version?
I don't have Linux for LV2 and not good with compiling code from source. Is there a way to use that newer version under Windows? would be awesome!

I've only ever used kn0ck0ut on Windows, just a VST plugin. I've never attempted to use kn0ck0ut on Linux.
My copy of kn0ck0ut probably isn't the latest ...

This is the copy of Kn0ck0ut I have (on Windows).png

Again don't get your hopes up, here is a typical result of Kn0ck0ut : it sounds computery ... https://youtu.be/KDV0WQRO0tE?t=25s

Trebor, are you aware that the next version includes the new "Vocal Reduction and Isolation" plug-in?

It is e.g. available in the current RC-3 download of Audacity 2.1.1.

I've recorded the beginning of the tutorial you've linked to.
The original audio track is only played for a little while and the guy keeps talking over it.
Anyways, the second half is the isolated version (strength 50, normalized).
The results are comparable to knockout, I should think, the more as the source is far from being ideal.

B-A isolation.mp3

Cheers
Robert

Robert, you might help me out. Im having a hard time with speech and drum separation when the drums are heard in the isolated center. How to get rid of that? Thanks