Infoseite // Mono-Tonproblem



Frage von Fubix:


Hi folks,
I have the following problem: I've made with a SonyVX2100 and a manual micro Sennheiser MD46 an interview with Final Cut Pro, cut, and everything played out well so far. However, the sound works on some computers do not say more precisely, there is virtually no sound.
After some research I came on it, it is because the sound was recorded in mono only and the problem apparently only occurs on machines with (internal) mono-boxes.
This is me not previously noticed, because I heard while shooting a stereo sound on my headphones, in Final Cut on both sides of a level rash see during the cut hear a normal stereo sound and synonymous on my computer after playing off Stereo sound heard. However, I see when I turn off the top sound track in Final Cut Pro, but still has a rash on the level of other sound-track, hear nothing.
I know I could now delete the track with no sound, double the "audible" track and then adjust the two tracks so that it still sounds like stereo. However, this would be an enormous effort, because I consider it quite a few older videos still would have to make later. Is there an easier way? And why, I actually get through the entire production process is always a stereo sound?
Am grateful for every tip.

Space


Antwort von tommyb:

So if, on the second track (Ch 2) is the sound of it, on the left (Ch: 1) does not, then the Calculator play with only one speaker generally accessible from the left lane (Ch: 1.)

The issue is more of a mistake on your part - because of course be traces with a mono signal from the sound on BOTH are and not just one.

Space


Antwort von Axel:

In Final Cut Pro - if it otherwise ceases - auto a stereo track with two channels created. a sound is located on the left channel, you had to pull him with the balance control on the center. (It may, however, that you had with the VX on an XLR adapter box has the mono signal on both tracks). Of course you can leave the audio output as Mono synonymous. Whether single or duo - what one might call not stereoscopically recorded two-channel audio -: To the sound interruptions of you described was not to be. No idea how that happened.

Space


Antwort von Alan Smithee:

Could it be that the sound on the second channel has a rotated by 180 degree phase, and therefore the stereo listening to you what comes out, but the Down Convert to Mono ses the signals?

Can it be that your camera as opposed to your micro does not have a balanced audio input and the micro is connected as follows: Screening Micro s.Kammera mass of micro s.den a channel Pros, Cons of Micro s.den other channel? That would explain why the phase rotated on the other channel.

Countermeasure: throw away the section of a channel and the other set to both, or connect the micro with another adapter s.die Camera.

Space


Antwort von Fubix:

Hi,
thank you very much for your tips.
I was wrong s.einer job with my posting, sorry, I'm probably a few settings changed too much. In any case, I have the DV editing on both tracks level you can see and hear.

In addition, it would be mentioned that the recordings with a wireless microphone (Sennheiser EW2 G100) were made, this error did not. Although otherwise yes all the settings in Final Cut and s.der Camera were the same.

@ Tommyb: That was synonymous thought, but if it is an output error, how can I change that then. My audio settings in the export are:

Format: Linear PCM
Channels: Stereo (LR)
Rate: 48 kHz
Render Settings: Quality: normal size
Data Format: 16
Little Endian: enabled.

Of course I already tried some changes, but without effect. For mono I hear nothing at all for example, synonymous to my calculator, where the sound has always synonymous works in stereo.

@ Axel: When I balance the sound tracks in the middle, I do not hear nothing more. And if I spend as a single, I have the same effect.

@ Alan: Yes, could be, no idea. The Micro is connected via a supplied XLR to mini-jack adapter cable s.die Camera. But if this is the problem, how can it be that I listen to stereo, when turning on my headphones?
The solution to throw away the one channel and the other set to both, would, I've already tried synonymous, but is just very pointless, because the concerns already cut quite a few videos.
There must be another solution.

Space


Antwort von Alan Smithee:

"Fubix" wrote: @ Alan: Yes, could be, no idea. The Micro is connected via a supplied XLR to mini-jack adapter cable s.die Camera. But if this is the problem, how can it be that I listen to stereo, when turning on my headphones?

The effect is that, yes exactly the same signal on both channels as is - just with reversing the signs. You're listening to the left ear, the signal with the value X in the right ear and the signal with the value-X. Our brain keeps it for time differences. If you aufaddierst but the values X and-X (which is the stereo to mono conversion is done), then yields the value of 0 - ie no signal.


"Fubix" wrote: The solution to throw away the one channel and the other set to both, would, I've already tried synonymous, but is just very pointless, because the concerns already cut quite a few videos.
There must be another solution.


Perhaps it is synonymous to an audio filter "phase flip", which you could just use one of the two channels. (It is best just to the O-sound before mixing with other tracks.)

Space


Antwort von Fubix:

Somehow I'm currently at an impasse.

I have now found out that the sound at the Calculator with the integrated (mono) speaker with stereo does not work, but if one puts it on the left or right. He goes left right both as synonymous. When VLC player you can do so, after all, but the video is to later run as Web video and since then no one can even adjust the left or right, and the like.

If the problem with the no sound from the mono speaker in stereo setting, it is that the computer X and-X is added, then I do not understand how to prevent it.

Of course I could play the whole movie with a mono signal, so that the sound almost just left as is heard, but that sounds natural at all with stereo speakers, of course, be nice.

On my calculator I can, moreover, with my headphones synonymous the stereo signal normally move to left or right.

Space


Antwort von Axel:

"Fubix" wrote: Of course I could play the whole movie with a mono signal, so that the sound almost just left as is heard, but that sounds natural at all with stereo speakers, of course, be nice.

True mono (a mono downmix) is on a stereo "system" played at the same left and right.

Space


Antwort von Fubix:

@ Axel: But as I said when I try mono output, then I have no sound. How do I make a downmix in Final Cut?

Space



Space


Antwort von Alan Smithee:

If you can live with the fact that only the sound of one channel in both speakers (for stereo sound) or on the single speaker is heard (in mono sound), then do the following:

(I describe it for Final Cut Express 4, because I do not have Final Cut Pro)

New sequence to create because the entire film pure; rid of check marks in the Modify menu in front of "linking" and "stereo pair", one of the two tracks (which are now individually selectable) delete, check in the Modify menu in front of "linkage" place it back, in the sequence select all and move to the viewer, the viewer select the tab for the sound, set balance to 0, DONE!

Space





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