Mixing audio as stereo onto both channels...

Hi guys, I think this might seem like a real amateur question but I've struggled with this for a while now! Thought I better just hang my head and ask!...
I recently filmed a therapy session with one clip mic on each person; I set the camera so it put each clip mic onto each separate mono channel, so I could test them individually, then I planned to mix them as stereo in the edit.
After a few tries, I've nested the audio as once sequence and mixed it but still when I export and play back the final .mov the audio comes separately through each speaker.
Can someone educate me please? Be much obliged!
Alex

I've nested the audio as once sequence and mixed it but still when I export and play back the final .mov the audio comes separately through each speaker.
Mixed it how? And what do you mean; "the audio comes separately through each speaker" ? Does that mean BOTH speakers? How did you pan the clips on A1 and A2? If both are panned to 0, then both track's audio will output to both output channels (left + right), otherwise known as mono.
If you want to make them stereo, pan each track's clips differently. For example, if you pan the clips on A1 to -1, they will only output to the left output channel. I'd recommend panning the clips on A1 to -.75 and the clips on track A2 to .75.
-DH

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Duplicating audio to play in both channels

I want to take my audio for channel one and duplicate it so that the same audio plays out of both left and right channels. I can duplicate the audio and put it on the layer below but it just plays both layers our of the left channel. how can i make it play out of both left and right channels?
Thanks

It sounds like you originally had a stereo pair (a1/a2) that you unlinked, which gave you a Mono(a1) and a Mono(a2), and then you deleted one of them.
When you unlink a stereo pair, each resulting Mono track retains its original properties, including left or right channel assignment. This can be changed with the pan control in the Viewer.
When you duplicated the clip (a1 for sake of argument) and placed it on a new track, all you got was another copy that retained all the same characteristics of the original - including the left or right channel assignment. That's why you still only had audio from one channel.
The way to change this is to pan to center as I described above.

Can I playback in both channels with my audio interface?

From what I've found so far I'm afraid the answer is already "no" but I have to ask for myself.
When I record into QuickTime movie (not Pro) using my Alesis IO|14 Firewire interface, it only plays back on the left channel.
Is there ANY way to get it to play back on both channels? (Or is this a sneaky way of urging us to upgrade to QT Pro?)
I'm assuming the audio quality of my M-Audio Nova condenser mic is better than my iMac's built-in mic, which is why I'd really like to do this. I don't even need true stereo, just both channels playing back.
(QT 10.1, on Lion)
Thanks.

The mic and interface record just fine into GarageBand, either as stereo or mono, and plays back out of both channels with the same setup, so I think the problem is with QT.
I don't find any kind of switch like that in the Hardware Direct Monitoring software for the Alesis, but I'll investigate further.
As I mentioned, I've searched this and other forums and it seems like this is just how QT is set up. But I was hoping for some sort of solution.
As previously indicated, I am not familiar with your IO device, so let me ask a few questions here.
1) Is the Nova mic you mentioned mono or stereo?
2) If mono, are you using two of them?
3) If mono and you are not using a pair of mics, does the input interface hardware have the ability to blend left and right (mic 1 and mic 2) input channels?
4) If mono, you are not using a pair of mics, and the device has no ability to blend left and right channels, are you you using an adapter cable to input a split signal to both input channels of the device?
If you are using a mono mic to input a signal to only one channel of the input device and are not/cannot blend this signal to both channels before output via the Firewire cable, then its sounds like your system is working normally and correctly. Basically, the Firewire audio is sent to the QT app as received from the Firewire device and recorded as is in stereo. I.e., if the left channel is active with the mic signal and the right channel is empty, then the audio is recorded only to the left channel and the right channel records the "nil" signal/nothing. On the other hand, GarageBand is an audio editor designed specifically to blend, pan, duck, filter, and/or otherwise taylor audio content as desired by the user. (I.e., which includes the ability to re-channel a single mono audio channel to both channels of a stereo track during the recording process which the QT app can't do.) In short, both apps are doing what they are designed to do as they were designed to do it. As such and as previously noted you have three basic options here.
1) You force the IO device to send stereo or two-channel mono audio to your Mac by using two separate mics, use a single stereo mic with dual channel audio output, using an adapter cable to split the single mono mic audio output line into two separate lines to be plugged into both channels of your IO device, or you can apply/blend the active channel to left and right Firewire output channels within the device if it has this capability.
2) You can use GarageBand to do create and export audio recordings instead of the QT app, or
3) You can purchase QT 7 Pro in order to fix your left channel problem post recording by simply applying the left channel audio to both left and right channels within the audio track so it will play as you want in any media player on your computer.
(Actually, there is a fourth option if you are using an external amplifier for playback, which is to simply use the output amplifier to accomplish re-channelization during playback rather than actually fixing the media file with QT 7 Pro.)

Why does compressor settings of aac audio, stereo, create 2 channel mono from 2 discrete audio channel movies?

Why does compressor settings of aac audio, stereo, create 2 channel mono from 2 discrete audio channel movies?

well depending on how your audio is brought into your system you can select it as two streams of mono or a stereo pair. In reality, unless it's mixed in stereo, that's just two streams of mono locked together. Other streams brought in via other means, can have a lot more audio channels, e.g. 8, 16, 24.
In your case, with what you're doing, two separate channels works best, so you can control the levels of two very different audio sources. If, for instance, you were taking the feed from the mixing board during a concert, you might want their stereo out. Otherwise you might be dealing with the 1.2 zillion channels that they're mixing live.
I like separating the tracks coming in. I work with people who prefer to lock them together. Locking means the tracks move together during editing. Ok, fine, but I'm usually dealing with different audio sources, like you are: a camera mic (safety on location) and a close mic (shotgun, lav). Or I have a shotgun source and a lav. I want to determine the best source audio for the shot. Sometimes it's a lav, sometimes a different feed from somewhere else, sometimes the shotgun, and sometimes a mix of two sources. But if they're locked together and pre-set to come out evenly from both speakers there no way for me to make a determination. The other guys like to cut and figure out the audio later.
To each his or her own. . .

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I need output audio in the finished movie to play in both channels.
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Thanks, David.
So, if I have talent A on the left channel of the video, and talent B on the right channel of the same stereo recording...
can I pan each of these "mono" sides centered so they both come out the left and right sides ?

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ahhhhh.... once i double clicked on the synced video/audio file in the timeline it allowed to make the adjustment in the inspector window.
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polyglotinc wrote:
Actually, after scouring the web, I see that RogueAmoeba also has a free utility called LineIn which simply sends the audio in to the audio out and doesn't interfere with other programs like iTunes!
On the other hand, after downloading and trying it, there is a noticeable latency between what goes in and what comes out.
The latency is in the computer, not the software. Most of the latency is in the A/D and D/A conversion.
You need to connect the analog input to the analog output directly to get zero latency.
Check this page:
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Mono Audio in Both Channels

I have audio AIFF files recorded in mono that when imported and put into the timeline only play in one channel (sometimes left and sometimes right apparently at random). It makes no difference how the pan is set for a given clip. How can I get these clips to output in both channels?

Rienk wrote:
I bet you hear it on the left channel when the audioclip is on audio track 1, 3, 5, 7 or etc. And you hear it on the right channel when it is on track 2, 4, 6, or etc.
Go to User Preferences and check the Audio Outputs tab.
That's right, odd on one side and even on the other.
The Audio Outputs setting fixed it, but that preference only applies to new sequences. You have to set it for the current sequence in the Sequence menu.
Thanks.

How do you mix audio from completely discrete channels?

discreet so that I can have more flexibility for volumes etc when I mix it in premiere. How can I separate the two channels then pan them back to center?

In the project panel select your clip, right click and select 'Modify footage' (or something like that) This will then give you the option to change the sound from stereo to 2 channel mono. I'm not at my editor at the moment so the answer might seem a little vague, if you have any problems come back, and I or someone else, will give you more details.

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Hi
I have recently captured audio via an XLR port on my camera and was aware that it is was only on one channel but was hoping to copy the clip into another channel in FCE so it played back on both channels. For the life of me I cant work out hoe to do it because it shows up as two channels (one with silence) and wont let me seperate them.
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You can do the following:
o - select the clip in the timeline
o - cmd-L to unlink video and audio
o - alt-L to separate the 2 stereo channels
o - select the empty audio channel and delete it
o - open the good audio channel in the viewer
o - change the Pan control to 0 (from -1 or 1)
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I'm worried I've made some sort of adjustment in a setting somewhere without knowing it. In my FCP7 project, I have several audio clips in stereo with audio in both a1 and a2 (or a5 and a6, etc.). In the past, when I have made an adjustment with one of them, say I brought the level of a1 up or down (or used my pen tool to adjust a increase or decrease in volume), it automatically did the same for a2. But for some reason today it isn't making the automatic adjustment for a2, it is making me go and replicate the same thing in both channels. Does anyone know how I can get back to the point where if I adjust one, it automatically adjusts the other?
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I'm doing a shoot of a church play. I want to record audio straight from the sound board. I've been told that it has a stereo 1/4" output. I'm going to be borrowing an audio recording device from a friend (think it's called an H4?). He said it has an XLR input (going to have to buy an adapter), and it can record audio in a bunch of formats, all the way up to 96 KHZ / 24 bit.
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