Stereo Out -mono/stereo - Input 1/2-

I've got a couple of projects open and just need some advice on something that I've just noticed.
On the channel strip it has.
Input 1
Stereo Out
Two independent columns
Mono circle
Okay, I thought that because the the mono circle is there, there would be one single fader gauge/column?
When I press the circle to get to get the double circle stereo, the gauge itself doesn't change, but stays the same. What changes is the Input 1 to Input 1 -2. I would have thought the gauge would change in accordance with whether it be mono or stereo? Or does the Input change from 1 to 1 -2, represent this?
Likewise, on another channel strip
Input 1-2
Stereo Out
Single column
Stereo double circle
When I click the double circles the gauge just stays as it is (single column) whether it be mono or stereo circles. the input changes from Input 1 (mono) to Input 1-2 (stereo).
I think I'm just confused by this.
Any help would be great help.

ekaton wrote:
I've got a couple of projects open and just need some advice on something that I've just noticed.
On the channel strip it has.
Input 1
Stereo Out
Two independent columns
Mono circle
Input 1, mono circle: the input is mono but "stereo" mono, signal in the middle.
Okay, I thought that because the the mono circle is there, there would be one single fader gauge/column?
No, only if the strip also has a mono output.
When I press the circle to get to get the double circle stereo, the gauge itself doesn't change, but stays the same. What changes is the Input 1 to Input 1 -2. I would have thought the gauge would change in accordance with whether it be mono or stereo? Or does the Input change from 1 to 1 -2, represent this?
No, it has to do with the complete signal flow. Mono in>mono out: single gauge. anything in, stereo out: double gauge.
Likewise, on another channel strip
Input 1-2
Stereo Out
Single column
Stereo double circle
When I click the double circles the gauge just stays as it is (single column) whether it be mono or stereo circles. the input changes from Input 1 (mono) to Input 1-2 (stereo).
I think I'm just confused by this.
That is because it is confusing. It would be Logical and Reasonable if the gauge doubled up in that scenario. The channel strip has no inserts on it?
Any help would be great help.
I am not sure if this is any help and therefore great help. I'll check out what I just said (I am not completely sure) in L9 later.

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Stereo or Mono? Which? And why?

Once again I'm starting a new thread to explain some general audio principles that newbies have trouble with.
There's an issue here that's a bit difficult to explain--the difference between "stereo" and "mono".
You have two ears, so you hear "stereo". Your ears send a left signal and right signal to your brain. Your brain processes the difference between the two signals and gives you a sense of direction. You can figure out where the sound you are hearing is coming from.
Originally, recording technology only permitted mono recording. One microphone, and one speaker to play it back. When you listen to recordings made before about 1962, you are listening to a mono recording. If you have a modern stereo and you are playing back a recording from before 1962, you are getting signals out of your left and right speaker, but the signals are identical. You are just getting mono out of two speakers.
Originally "stereo" meant placing two microphones on something--one to represent what the left ear would hear, and one to represent what the right ear would hear.
However, when you take one microphone and plug it into a recording device, you can only record a mono track. Your recording device might permit you to record what you think is stereo, but in reality you are only recording two identical mono tracks.
A guitar also has a plug that comes out of it that sends a mono signal.
Nowadays we create fake stereo inside the recording device by means of what we call a digital reverb or digital delay. This device takes a mono input (such as from a single microphone or from a single guitar cord) and simulates the sound as if it were playing in a much larger room, with positional information included--placing something in a simulated position in the stereo field and creating a simulated left stereo channel and a simulated right stereo channel.
So if you record one input, and put no effects on it, you get mono. If you run it through a stereo reverb or a stereo delay, you get simulated stereo.
If you put an acoustic guitar in a large, reverberant room, and set up two microphones, one on the left side of the room and one on the right side of the room, and record the two mono mike signals to a stereo track on your digital recorder, then you get real live stereo.
When you play a software instrument in GarageBand, it records it as a stereo signal. What you are usually getting is in fact a monophonic sample that is processed through a stereo reverb, simulating stereo. In some cases, it may actually be a digitally sampled musical instrument that was sampled in stereo, with two microphones, like the example of the guitar in the reverberant room that I mentioned above. Software instruments of drum kits and acoustic pianos are examples of instruments that are usually sampled as real or artificial stereo to begin with.
Beginners think "stereo" is the right way to record, and "mono" is not. But this has nothing to do with the right way to record, and has nothing to do with wheter it's a high quality recording. If you are recording through only one microphone, or only one guitar cord, this is mono, and that's right.

Good points, Wheat. And when you record from several sources, and combine them and mix them, panning things to "set the stage" you get a stereo mix, of mono recordings. SI, the final result is stereo, not necessarily each individual piece of the recording. Of course, a drum kit can be recorded in stereo, as well as some keyboards that are actually stereo. But most things you hear on CDs are a compilation of mono tracks, panned to create the stereo image you hear.

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Thanks

Tjed wrote:
Could that have something to do with why I got no sound out of the external monitors (speaker)?
it's possible, if for instance the track was set to channel 1 (mono) and you were sending a signal on channel 2 (or any other channel your interface might offer), but you may want to start a new thread with this issue providing all background info for it

Can Compressor downmix from stereo to mono?

Seemingly simple question - when compressing DV/AIFFs to web H.264/AACs, is there a way to downmix from stereo(dual mono) to mono without boosting the level?
I don't care if it just uses the left channel, the right channel, or mixes both together - I just want it not to clip 0dB when it comes out mono. Is there a way to do this in Compressor?
(NOTE: without using the Peak Limiter filter to lower the level, which always seems to cause the job to fail)

First you have to split up the interleaved stereo file->in the Audio bin select "copy/convert" (or hit control+c) in the menue select "Interleaved->split" and tick the box "add to Audio bin"
Now switch Audio track 1 to "Left" at the very bottom of the channel strip->long click into the stereo symbol->menue opens->select "left"
Do the same on Audio track 2 in this case choosing "right" at the bottom of the channelstrip
Now select the reimported split stereo file in the bin and split it up into two seperate files in the edit menue->"split selected Split-Stereo-file"
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Can Compressor downmix from stereo (dual mono) to mono?

Seemingly simple question - when compressing DV/AIFFs to web H.264/AACs, is there a way to downmix from stereo(dual mono) to mono without boosting the level?
I don't care if it just uses the left channel, the right channel, or mixes both together - I just want it not to clip 0dB when it comes out mono. Is there a way to do this in Compressor?
(NOTE: without using the Peak Limiter filter to lower the level, which always seems to cause the job to fail)

I've been editing NLE for over 15 years and have never once used a "mono" track, never felt a need to, and Premiere tracks default to stereo normally, which matches my sources. All delivery is typically stereo anyway, so in the case you have with wanting to use just one mic, the Fill Left or Fill Right works perfectly to "Pan Center" so to speak. Hopefully this will suit your needs. Maybe I have tunnel vision and am not understanding how a mono track is uniquely useful, but always open to learning new things.
In the situation where I might need to switch mic sources from time to time within the same stereo clip, for instance a wedding with a shotgun and wireless lav, I just use the Razor to put cuts in the audio clip where I want to switch. I just alternate applying Fill Left or Fill Right to each cut segment as needed, and throw in an audio crossfade at the cut point for a smooth transition.
If I need to MIX the left and right channels in varying degrees of volume, I will duplicate the stereo track and apply Fill Left to one and Fill Right on the other and this has the same effect as two mono tracks, each centered. There's certainly many ways to accomplish the same thing with almost any aspect of editing and that's just how I do it, not wrong or right really.
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How can I switch my output audio from stereo to mono?

Hey,
I can only hear out of one ear and I would like to be able to listen to the other half of my music on my headphones, how can I switch my audio from stereo to mono?
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http://www.radioshack.com/product/index.jsp?productId=2102690
http://www.scansound.com/index.php/stereo-to-mono-adapter.html
Or you could buy a mono/one ear headset. http://www.beso.com/2699431644/detail

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I'm new to surround sound editing, so for the past few weeks I've been searching through internet how to create suround sound for my movie. I have a whole movie already done in Premiere Pro 5 (every scene in it's own squence). In these sequences I have stereo audio clips that create a complete stereo sound, but since this movie is going to go on film festivals I have to create surround sound.
Through my reasearch I came across many explanations of how to create it, but the more I read the more it confused me so I decidet to ask for help on this forum.
1. Is it posible to create surroundsound directly out of stereo audio (I know that the sequences that you are working in has to be set to surround sound) that I have in first, second and third chanel, that have surround sound controls above them in Audio mixer?
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To output to DD 5.1 SS, you will need an Encoder, like the Minnetonka Audio SurCode DD5.1 SS plug-in.
You can also use Audition (do not know about SB) to create 6-channel files (usually WMA w/ either 5, or 6 discrete channels, depending on how you handle the LFE). Still, to use such a set of files with Audio-Visual material, you will need an Encoder. Minnetonka Audio has others, like the SurCode DD 5.1 SS stand-alone and the DTS stand-alone.
If you have disassembled the original audio streams into mono sources, you can create faux 5.1 SS, and with a little work, it can be quite convincing. The 5.1 controls in a 5.1 Master Project, can be very useful for "creating" your sound stage. You can also use those to feed certain frequencies from other sources to the LFE, and to the Center channel. With good stereo in the Front speakers, you should already have a decent phantom Center, and can punch that up even more.
I would recommend starting with the Help File for "Surrond Sound," to get the basics down, plus the mechanics in PrPro. HERE is a little sample. You might also want to see the links in this PrPro-Wiki Search for more material.
The Recording Academy's Producers & Engineers' Recommendations for Surround Sound Production is useful paper.
I recommend three books:
Surround Sound, Second Edition: Up and Running, Tomlinson Holman (cannot find my copy for ISBN)
Instant Surround Sound, Jeffery Fisher, CMP Books ISBN 1-57820-246-9
Basics of Video Sound, Des Lyver, Focal Press ISBN 0-240-51561-7
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Stereo-to-mono glitch when match-framing

While searching for an answer I found a posting from ChiaMac dated Nov. 15, 2005 which describes the same problem I am experiencing. I have pasted the post below. Does anyone have an answer ?
Hi,
Three different editing systems, all running OS 10.3.9 and FCP 4.5 -- an iBook G4, PowerMac G5, and PowerMac G4.
Quite often, when match-framing in the timeline to bring up a clip in the viewer, the viewer will show dual mono audio, whereas the source clip has stereo audio. Then, when I try to cut that viewer clip into the timeline, in this sequence or another, it will be dual mono. Quite irritating.
It is quite replicable. Not all clips will produce the stereo-mono result, but it is replicable with the same clips over and over.
The "linked selection" has no effect on the process, no one has pressed command-L by mistake, and all audio settings on each of the systems are set to capture and output in stereo.
Is this a known FCP 4.5 HD glitch? I haven't seen it listed anywhere when I've searched for it. Any ideas, suggestions...?

>When converting a file from stereo to mono, Audition severely suppresses the amplitude of the entire file. This happens when using both the Convert Sample Rate method, as well as exporting a file from multi-track.
>It gets weirder: files that were recorded quite a while back will process this conversion just fine, but newer ones will not. All files are recorded in 16-bit 44100 stereo and saved as a Windows PCM wav file - so as far as I can tell there is no difference and I'm simply confounded.
Generally when this happens, it means that there isn't that much stereo (ie, difference between the two channels) in the file anyway, and one of these two channels is inverted - so that what happens when you combine them is that the 'mono' parts then cancel out, rather than add together, and all that's left is the difference - which looks pretty much like what you've got.
To test this, the thing to do is to select one channel only in EV, and invert its polarity (Effects>Invert). If you now get more like the waveform you were expecting when you convert to mono, then you've found the cause. But not necessarily the reason for it...

Re-Capturing Media with original settings but with Stereo not Mono Selected

Hi,
I am trying to re-capture about 17 hours of interviews that I just shot in Africa over the past month. It has all been digitized with the audio set to Mono instead of Stereo (in my jet lagged mindset I forgot to set to Stereo)! I need the stereo setting as I always had a wireless lav on the subject and a wired lav on the interpreter and I need to be able to split them out in the sequence. I have already built sequences with all the interviews and a timecode window burn for my client, which sounds fine for simple timecode logging, so I would like to reconnect so that all of those sequences will remain intact.
So when I try to go recapture, whether I delete the original clip OR just make it offline and save the new captured clip to a different location, it automatically captures in Mono, as that is what is set in the original clip under Audio Tracks in the browser. It will not let me change that setting in the Browser, and stereo is definitely selected under Audio Clip settings in Log and Capture.
I have to think there is a way to do this so that I can save my original clip information, without having to reset all new in and out points and recapture it all with the exact same name to a different drive so it works in my sequences.
I don't need to recapture the 18 or so hours of b-roll thank goodness! As it was all shot with a mono shotgun.
Also, when I go to recapture the clip a warning comes up and says I am trying to capture media shot in Non Drop Frame on a device set to Drop Frame..etc etc etc.
I did shoot in non drop frame but I have not changed anything on my deck (Sony DSR-11) and don't even think there is a switch to go between the two. If I try to simply capture a new clip I get no such warning? It seems to play fine regardless but I wonder if I will have issues down the road integrating the new clips in with the b roll.
Many Thanks,
Any help is greatly appreciated,
Peter Mallamo

If both tracks are in the sequence, then just select one side, and in FCP's Modify menu (audio submenu there), pan all to one side, then select the other track and pan all to the other... you can change the stereo to mono and mono to stereo too in that same menu... no need to recapture at all. Do this mono to stereo move simply by selecting the clips in the sequence, and checking on or off the stereo pair selection...
Jerry
Message was edited by: Jerry Hofmann

I've Lost My Stereo Out Channel Strip

Some how I've lost my stereo out channel strip and can no longer hear my tracks. I see the levels moving when I play. I no longer see the vertical seconds lines in my main work area, nor can I deselect a track by touching the gray background. On the channel viewer on far left at the very bottom is a speaker with red X and "no out" marking. Using Logic Express. What wrong button did I push ? Here is a screen shot http://galleries.tomsalyer.com/picture%201.png Thanks in advance.

Ok, replaced the strip, thanks ! Also, somehow I had managed to unclick the " Input 1-2 " and "Stereo Out" buttons on all six track's channel strips, and once
I fixed those, I now can hear my output again.Don't know how I messed up, but will be careful in future ... they say you can't teach an old photographer new tricks, but am determined to learn audio

Sync sound mono stereo issue

I'm currently syncing sound for a short film on Premiere CC. I synced all the clips in the timeline and it all syncs and sounds great. But when I "merge clip" the clips audio in the bin changes. The sync is still perfect but the sound goes from stereo to mono and tracks are added. The audio on-set was recorded in two ways.
1) 1 track stereo L+R
2) 3 track mono
When I merge clips with the the 1 track stereo, it goes from being one track to two. And it's no longer L+R. Both tracks are centered. When I sync the 3 track mono it adds 6 additional tracks. the top track being the audio and the bottom two being empty. Then the 4th track has audio followed by two empty tracks. Then the 7th track has audio followed by two empty tracks. Why am I having this issue and how do I fix it?
Tom if you're here I could use your help. Thank you!
Dan

The issue comes from multi-channel .wav files.
I've worked on projects with multiple audio sources where the sound guy recording each one as discreet .wav files. So if you had two lavs and a boom for a particular shot, each take would generate three distinct .wav files. It took slightly longer to align on the timeline for syncing, but when I performed Merge with them, everything worked fine.
But on my current project I was working with a different sound recordist who would record those multiple sources into a single multi-channel .wav file. They were all recorded mono, but on some shots it would result in 6 different recorded mono tracks. Premiere displays those multiple mono tracks in their own separate tracks, already lined up on the timeline.
But when I merge this audio with picture, the resulting clip is crazy.
When the audio is synced and merged with picture into a clip, it exponentially adds blank tracks. Normally, during a merge, stereo tracks are split into two distinct mono tracks, one for each channel and mono tracks should remain the same. That is what is supposed to happen. But as we see here, an additional thing is going on that shouldn't happen.
Instead, with multi-track files, it treats ALL of the tracks as singular multi-channel tracks and tries to "split" them by creating additional empty tracks. But the most bizarre thing of all is that the number of dupes is equal to the total number if tracks. So for a shot with two lavs and a boom, there would be three tracks in the one clip. But Premiere is treating each of the three tracks as if each of them has three channels and creates three tracks for each of them; one with audio and two blank ones, for a total of nine tracks. For shots with three actors on lavs and with a boom, there are four tracks that are multiplied four times, giving me 16 tracks. I even have some takes where the five original mono tracks are turned into 25 tracks. Again, only five of them actually have audio in them and the rest are blank.
It's exponential. Had I been given an 8 track file, it would be turned into 64 tracks but 56 of them would be blank!
To make it even more fun, the real audio is spread out vertically on the timeline with the dummy tracks in between also equal to the number of real tracks. So a merged 4 track clip places the real audio on tracks 1, 6, 11, & 16, but audio from a merged clip with 5 tracks puts the audio on tracks 1, 7, 13, 19, & 25. So I can't just do a blanket "Modify Audio Channel" on everything and delete the dead tracks. It is all relative.
After the clips were borked up with the extra tracks, I went to Clip->Modify->Audio Channels and turned off all the empty channels, then saved a preset based on how many tracks there were. So in my footage bin I was able to organize by Audio Info and it listed the number of tracks it had. So I could put all of my 12 Mono Track clips together, highlight them all, then apply my "12 Mono" channel filter preset to all of them at once. Then I dragged them back to the timeline and they were fixed. Technically, those blank tracks probably still exist, but they are no longer visible.
And better yet, it doesn't put any vertical gaps between them. So if my audio was really on tracks 1, 6, 11, and 16 it places them on the timeline in tracks 1-4.
Now that I have the presets I can apply it to any further projects where I encounter this. It is still idiotic and obnoxious but not as catastrophic as I thought it was.

Aux strip mono/stereo problems

Gday,
I am having inconsistent results with creating stereo aux channel strips.
I'm using aux channels for submixes and effects routing.
In some projects (created in earlier versions) if I select stereo in create new aux strips I get mono strips - usually without stereo/mono switches on bottom left of strip.
In new projects I get stereo channels with stereo audio inputs ok, but only mono bus inputs.
Any ideas on what I am missing please?
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Enable Universal Track Mode in your Preferences (Audio->devices->Core Audio) and try again.

The mono/stereo button, I and R gone

the mono/ stereo selector button, Input select and record enable buttons suddenly missing from the mixer windo under the faders. How do I resolve this. any ideas? Currently up to date. mac book pro. snow leopard. thanks.

http://help.apple.com/logicpro/mac/9.1.6/en/logicpro/usermanual/#chapter=2%26sec tion=0
Read: Configuring Your Audio Hardware
See if that helps.

Stereo Out -mono/stereo - Input 1/2-

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