FCP is turning my stereo audio into mono... bleeding?

Final Cut Pro is somehow turning my audio, which is in stereo into mono. Meaning that on each channel, there is some bleeding going on from the other channel. What gives? This is not the case when I initially drag the file into the timeline, but does happen over the course of time or at some unknown point. Does anyone know why this is? Can I change this so that it goes back to how it's suppose to be???

Hi
*Not knowing the origin to Your problem - General approach when in trouble is as follows.*
• Delete iDVD pref file - *or rather start a new user/account* - log into this and re-try
iDVD pref file resides.
Mac Hard Disk (start-up HD)/Users/"Your account"/Library/Preferences
and is named. com.apple.iDVD.plist
While iDVD is NOT RUNNING - move this file out to desk-top.
Now restart iDVD.
• Free space on internal (start-up) hard disk if it is less than 10Gb should rather have 25Gb
• Hard disk is untidy. Repair Permissions, Repair Hard disk (Apple Disc Util tool)
• Program miss-match. iDVD 5.0.2, Mac OS X.4.11 AND QuickTime 7.5.5 - is OK - DON’T work under Leopard
• Program miss-match. iDVD 6.0.4, Mac OS X.4.11 AND QuickTime 7.5.5 - is OK (might work under Leopard)
• Program miss-match. iDVD’08 v. 7.0.1, Mac OS X.4.11 AND QuickTime 7.5.5 - is OK (might work under Leopard)
• iDVD (08) v7 Locate theme folder. Move out iDVD1, iDVD 2 and eventually iDVD4 folders to desktop - re-try
Macintosh HD/Library/Application Support/iDVD/Themes/ zzzzzzzzzz
or
Macintosh HD/Users/Your log-in//Library/Application Support/iDVD/Installed Themes/ zzzzzzzzzz
• Try a Cleaning CD/DVD that cleans the laser lens on the DVD burner/player
iDVD 6.0.4 and iDVD 7.0.1 are compatible with Mac OS X 10.5 Leopard
Last resort. from Craig. Solved the problem!! Finally!!
I deleted every iDVD application and folder from my boot drive,
emptied the trash and then installed iDVD 08 using the customize option
and I am up and running.
If You do a re-install be sure to get rid of all iDVD old parts AND then EMPTY the Trash-basket !
iDVD updated ?
Apple Codec updated ?
Start a New Clean project - or delete project assets
No of Colors - must be set to millions
EdinSF writes that, The 10.6.3 update with an Open GL fix seems to have taken care of the problem.
Yours Bengt W

Similar Messages

How to turn a stereo clip into mono

I'm pretty new to Audition, so bear with me please. This seems like a really simple task, but I can't find the effect. I have a timeline sent from Premiere, so I'm in multitrack mode. Some clips are stereo, with one of the channels containing garbled audio from a camera mic. In Premiere, there is an effect called Fill Left/Right that just uses one channel. How do you accomplish this in Audition?

There are so many ways you can do this, it's hard to pick the most suitable!
Probably the easiest thing to do (because it doesn't muck up anything else) is to double-click on the imported track so that it opens up in the waveform editor. If you now open up Effects>Amplitude and compression>Channel mixer, you can manipulate what's on both channels from what's there at present. Without looking I'm not exactly sure, but there's a good chance that there's a preset in there that will do exactly what you want without you having to figure out the settings yourself, but it's not difficult anyway. When you click on Multitrack again at the top LHS of the screen, the original file will be updated. When you close the session you'll be reminded that you haven't saved it, and whether you do or not is up to you.

"Play stereo Audio as Mono"

I recently was tearing out my hair because I had mono checked (somehow). It was playing Mono through my Apogee Duet Audio interface, but playing stereo through my headphones jack on the core audio. I remembered it always worked fine in Snow Leopard, so I installed SL on a partition for testing purposes and sure enough the Duet played in stereo. So naturally I thought there was a problem with the drivers between Lion and the Duet. After much discussion with Apogee, frustration and online searching I found out about this "Play stereo Audio as Mono" business.
In your next update or release, please link "Play stereo Audio as Mono" in the Sound preferences pane as well. It is a major problem when your audio is playing in mono and you cannot figure out why because the option is hidden away in "Universal Access". As a non-impared user of OSX I have no need to go into "Universal Access".
Thank you.

Philmac88 wrote:
the setting still resets itself after restarting.
Then I'm stumped. I don't know why or what to do.
You could go around the issue by running a script at login to set this option. Here's a script I found on the net:
--script begins
on run
          tell application "System Preferences"
activate
                    reveal anchor "Hearing" of pane id "com.apple.preference.universalaccess"
          end tell
          tell application "System Events" to tell process "System Preferences"
click checkbox 2 of tab group 1 of window 1
          end tell
          quit application "System Preferences"
end run
--script ends
(It requires the "Enable access for assistive devices" pref to be enabled.)
Save it as an app in a convenient location (eg, <~/Library/Scripts>), and add it to your Login Items. It will run every time you log back in. Note that this is a toggle—if the preference is on, it will turn it off.

Design flaw in 'Play stereo audio as mono' of Universal Access Hearing-tab

The option to 'play stereo audio as mono' that comes with OSX 10.6 does not work as I expected.
When I enable this option it sounds like only one of the two channels becomes mono, while the other one does not sound mono to me.
It's hard to notice this, because the total sound does change to 'less' stereo.
I've done some testing with different soundcards and testing signals, and found out that when the option is enabled, the mono signals are routed incorrect.
While the right channel becomes mono, the left channel seems to be something else; I'm not sure if it's the original left channel of the stereo signal, though.
I have reason to believe that the resulting mono sound on the right channel correctly is the 'monofied original sound', but that from the left channel.
The resulting mono sound on the left channel sounds like the original left channel of the stereo sound, maybe added with the mono sound of the right channel.
Why do I think so? When using a sound card with more than two outputs, I can clearly see that sound is being sent to the second and the THIRD output, instead of the first and the second output, immediately after I enable mono. Resulting in output on THREE channels:
original left
monofied (left)
monofied (right)
On my soundcard I can disable the extra outputs, and than I hear:
original left + maybe monofied right
monofied (left)
I think the programmer of this great feature made an 'off-by-one error', consequently sending the monified output to the wrong channels;
to channel[1] + channel[2] instead of channel[0] + channel[1]
I don't know what happens to sound that is sent to channel[2] (the third channel) on a two channel soundcard.
It could be mapped to the the first channel, but that of course is speculation. Could be tested though, with the right audio signal.
I hope someone can confirm this. If more people experience this problem, maybe Apple can fix this so I can enjoy listening in mono.
I have tested this on the internal soundcard and three external firewire audio interfaces, of which 2 have 8+ output channels.
Thanks!

Thanks for the quick-and-dirty test.
Your findings are not a surprise to me.
It would be more interesting though to not use one's ears for proof.
Also, I have reason to believe that this result is valid for any two channel audio interface.
With the test below I can proof that audio is sent to three channels instead of just two, when enabling "Play stereo audio as mono" on an(y) audio interface with more than two outputs (enabled).
The test takes a little longer than the quick-and-dirty test.
If you don't have an audio interface with more than two channels of output, you can still perform the test by installing Soundflower first.
Soundflower is a virtual audio interface with multiple inputs and outputs, and can be used as an audio router or audio patchbay.
Get Soundflower from http://code.google.com/p/soundflower/ - it's free.
Here's the test …
Open System Preferences, choose the Sound prefpane and select the Output-tab
Select any audio interface with more than two channels of audio outputs as your sound output device ( Or use "Soundflower (16ch)" )
Keep the System Preferences open
Start Garageband
Create a new project
From Preferences select for Audio Input your interface-with-more-than-two-channels-of-audio ( Or use "Soundflower (16ch)" )
( selecting an Audio Output is not necessary, because we're not actually going to use our ears for proof )
Enable multitrack recording from the menu (Track / Enable multitrack recording )
Create four tracks as "Real instrument"; each one with an increasing Input Source: Mono 1, Mono 2, Mono 3, Mono 4
( the last one is just for verification )
Enable recording on these four tracks (if you can't select more than one, try enabling multitrack recording)
Open System Preferences, choose Universal Access (probably click 'Show All' first) and select the Hearing-tab
Make sure audio is played in stereo (unchecking the checkbox)
Keep the System Preferences open
Switch to the Finder or iTunes
Playback any song
Switch back to Garageband and check the meters on the individual tracks
( remember this is stereo, notice the number of channels with signal )
Switch back to System Preferences to enable mono (on the Universal Access prefpane)
Switch back to Garageband and check the meters on the individual tracks ( this is mono ! )
End of test ...
You will see that in mono a third audio channel is addressed, while there should have been only two in both mono and stereo.
The signal strength of channels 2 + 3 seem equal, and channel 1 looks much louder.
This difference in signal strength is very noticable when listening to channels 1 and 2 on separate speakers or headphone.
What is that playing on channel 3?
I must admit (against my original post) that this test does not proof that the signal on channel 1 is or is not mono or anything else; that requires another test.
One can of course record these channels and do some comparisons and subtractions or some other clever tricks.
Hope anyone can second this, preferably with an actual audio interface like Apogee Ensemble, Motu, RME, Presonus, Focusrite, etc.

Turning Stereo audio to mono

I have the Sony PMW-EXR1. The camera has 2 XLR audio inputs. I took some video using 2 lapel mics plugged into each of the inputs. Input 1 recorded to the left side and input 2 recorded to the right side. I want all audio to be turned into mono. I can't figure out how to do this...ideas?
Thanks,
Dean

Also, audio that imports into Pr as stereo can be tagged as dual-mono by selecting the clips in the Project tab, and choosing Clip>Modify>Audio Channels>Mono button.
You can only do this before you edit any clips into a Timeline. Once your clip is in a timeline, this option isn't available. But, after you do this, and you drag a clip to a timeline, the audio will map to two mono tracks, instead of a single stereo track.

Encore transcoded audio into mono instead of stereo!!

OK here is my workflow:
Shot 1080p video on Sony XDCAM PMW-EX1 with stereo audio track. Imported footage using Sony XDCAM Transfer (makes .mov files). If you open the .mov files in QT Player they show as having Track 1 - Video, Track 2 - Audio (left), Track 3 - Audio (right). I then used QT player on most of these files to set in and out points and then copy the selections, saving them into referenced movie files. (Did not do this on all of them though). In QT Player, all of these movie files play fine. Dragging the movie files into Peak 5.2 you can see they have a Track 2 and Track 3 for the audio (stereo!).
Then I dragged all my movies (referenced and non) into Adobe Encore CS4 and selected everything and transcoded it all. (I dragged it to the timeline befoer transcoding.) The timeline shows just one audio track. It's the audio track that appeared when I dragged and dropped the video from the bin into the timeline. Should I have made a second audio track before dragging and dropping?
Because when I did Build, and it made the BMDV folder, then I burned that to a BD-R, and played it, it's in mono. All the AC3 files are in mono (left channel only). Why would that happen? Shouldn't it automatically get both channels of the sound and do stereo, or warn you before burning if it's in mono?

You are correct, sir. I'm surprised the software is not intelligent enough to recognize that. It really should be drag-and-drop simple. It should at least ask the user, "do you want to discard one audio track?"
To solve this I tried the following: go into Final Cut and export the audio as stereo AIF, then drop that in. I wanted to avoid having to re-transcode all the video, but when I did this, it decided to anyway, then had an error. So I deleted the transcode folders. Then I went to transcode again and now it's saying "Error Creating Transcode Folder" or whatever. Sigh.
This program just seems too finicky and not very robust. I'm going to upgrade to Final Cut Studio 7 and just use Compressor 3.5, which finally can export a BDMV folder that I can just burn to whatever.

Merging clips turns stereo audio to mono

I've got a stereo audio file I'm merging with a RED Epic clip (with replace AV clip audio). Whether I merged by audio waveform or in point, the result is always a merged clip that has two channels, but is no longer stereo. It's like it has taken only the left channel and doubled it. Thoughts?

It's not a dual panned center mono file, there's something wrong with the way it sounds when left is panned hard left and right panned hard right. I've tried panning each channel hard the other way and it still doesn't sound like the original stereo file I've merged it with. Am I doing something wrong? Why wouldn't premiere just replace the AV clip audio with the singe track stereo clip? Why the need to break it out into dual mono? Is there a preference I'm missing or something? This seems unintuitive.

"Play stereo audio as mono" disabled after restart

I've been using the "Play stero audio as mono" option in Universal Access, but ever time I restart, the setting is disabled. As far as I know, this is the only setting that does this. I also have the "Balance" slider bar all the way to the left in the Sound control panel; this persists through restarts. What can I do to fix this?

Philmac88 wrote:
the setting still resets itself after restarting.
Then I'm stumped. I don't know why or what to do.
You could go around the issue by running a script at login to set this option. Here's a script I found on the net:
--script begins
on run
          tell application "System Preferences"
activate
                    reveal anchor "Hearing" of pane id "com.apple.preference.universalaccess"
          end tell
          tell application "System Events" to tell process "System Preferences"
click checkbox 2 of tab group 1 of window 1
          end tell
          quit application "System Preferences"
end run
--script ends
(It requires the "Enable access for assistive devices" pref to be enabled.)
Save it as an app in a convenient location (eg, <~/Library/Scripts>), and add it to your Login Items. It will run every time you log back in. Note that this is a toggle—if the preference is on, it will turn it off.

IDVD is converting my stereo audio to mono

The exported files are in stereo, yet when I burn it, they're in mono. What's going on?

Hi
*Not knowing the origin to Your problem - General approach when in trouble is as follows.*
• Delete iDVD pref file - *or rather start a new user/account* - log into this and re-try
iDVD pref file resides.
Mac Hard Disk (start-up HD)/Users/"Your account"/Library/Preferences
and is named. com.apple.iDVD.plist
While iDVD is NOT RUNNING - move this file out to desk-top.
Now restart iDVD.
• Free space on internal (start-up) hard disk if it is less than 10Gb should rather have 25Gb
• Hard disk is untidy. Repair Permissions, Repair Hard disk (Apple Disc Util tool)
• Program miss-match. iDVD 5.0.2, Mac OS X.4.11 AND QuickTime 7.5.5 - is OK - DON’T work under Leopard
• Program miss-match. iDVD 6.0.4, Mac OS X.4.11 AND QuickTime 7.5.5 - is OK (might work under Leopard)
• Program miss-match. iDVD’08 v. 7.0.1, Mac OS X.4.11 AND QuickTime 7.5.5 - is OK (might work under Leopard)
• iDVD (08) v7 Locate theme folder. Move out iDVD1, iDVD 2 and eventually iDVD4 folders to desktop - re-try
Macintosh HD/Library/Application Support/iDVD/Themes/ zzzzzzzzzz
or
Macintosh HD/Users/Your log-in//Library/Application Support/iDVD/Installed Themes/ zzzzzzzzzz
• Try a Cleaning CD/DVD that cleans the laser lens on the DVD burner/player
iDVD 6.0.4 and iDVD 7.0.1 are compatible with Mac OS X 10.5 Leopard
Last resort. from Craig. Solved the problem!! Finally!!
I deleted every iDVD application and folder from my boot drive,
emptied the trash and then installed iDVD 08 using the customize option
and I am up and running.
If You do a re-install be sure to get rid of all iDVD old parts AND then EMPTY the Trash-basket !
iDVD updated ?
Apple Codec updated ?
Start a New Clean project - or delete project assets
No of Colors - must be set to millions
EdinSF writes that, The 10.6.3 update with an Open GL fix seems to have taken care of the problem.
Yours Bengt W

5.1 (pseudo) mix from HDV stereo audio

I have done lots of research on this....and the folks in the encore forum have helped me figure out how to render my 5.1 mix to a Blu-Ray disc.
However now I have an editing issue....
I used the Adobe tutorial on how to setup a 5.1 sequence....I setup a new 5.1 master sequence, and told it I want 6 5.1 channels. I then copied the same audio track to each of the 6 channels in the project window. If I use submix channels, I guess you don't get the front/rear puck per the tutorial so I need 6 masters? It is clear that you need to choose 5.1, but not so clear on if you are importing stereo audio, how many master and submix tracks to setup.
I want to take my stereo channel mix, and "spread it" across the 5.1 sound stage. I know this is not true 5.1, but I don't care. I have done this with a much lesser NLE and if the rear channels are low, it provides a nice mix.
I think I am missing some of the steps though....do I need to separate my stereo captured HDV audio into mono or just leave it as stereo???
And regardless, once I had my 6 channels, and moved the pucks around, it was not outputting 5.1 to my PC speaker system. It is a 5.1 setup with a Creative X-FI titanium sound card. I do get 5.1 during editing from my other NLE.
I have read all the help files about choosing my audio hardware betweem WDM sound and Creative ASIO. However neither choice provides me audio out of my rear speakers during editing.
I then read that I need to setup my audio output mapping....and I need to "Drag the desired sequence channel tile into line with the desired hardware channel in the list." However I only have Speakers listed twice....and they only appear to be left and right.... Even though I have 6 audio channels in the sequence and a 5.1 sound card and speaker setup.
So the questions are:
1) What do I need to change to hear 5.1 audio during editing.
2) For what I am trying to do, should I be splitting my captured audio into mono channels or leaving it as stereo.
3) How do I setup my 5.1 sequence in order to achieve my goal.
I apologize if this is something simple. I have done the reading and research and cannot get it to work...
I feel like I am pretty close to being able to transition to this much more powerful tool. The video side is pretty straightforward. However I am having issues on the audio side.
If this was CS4 and a photo question, I could probably answer that!!!
Thanks,
BJBBJB1

Bill,
I typically do not resurrect old threads but there is so much good stuff here, I could not see starting a new thread!
I have been using this pesudo 5.1 technique with great success! However, the constant issues I have with transitions and having multiple audio tracks is really weighing on me. I am constantly creating audio sync issues when I insert transitions, or nudge an audio track by mistake, etc..
I am wondering if you have had much luck with any approach that limits the number of audio tracks.
Something I am toying with is having a 5.1 master track and feeding it my straight stereo input. Then moving the puck about one third of the way back from the front soundstage, and then using the center channel control to boost the center to a good level. This gives me a bit of a rear channel, a stereo soundstage, and I can control the center channel. Of course I cannot apply a delay to the rears using this method, but that is a minor loss.
However I do miss the very discrete mix for the front, center and surround of the other method. So is this the best I could do given my current goal of limiting the number of audio tracks on the timeline?
If I could feed two or three submixes with one stereo track source, that would be nice and allow me to do what I want with only one stereo track on the timeline, but I don't think you can do that can you?? If you could keep the puck available on the audio track that then feeds the submix, that would also help. But as soon as you assign a track to a submix, you lose the ability to control the soundstage for that track. All control passes to the submix unless I am missing something.
The bottom line is any time I have 2 or 3 audio track copies of my original audio source spanning an hour or more, it gets unwieldy. I am okay using additional audio tracks for music or sound effects, as they are short in length.
As always, any ideas most welcome!
Bill

Stereo audio goes to A1 and A17-destination track problem??

So I'm working with stereo audio that I've recorded via the Voice Over tool that was originally in my timeline. I recorded a ton of different clips of voice over so in the end, I put them all into the Browser, renamed them, and changed nothing else (I deleted them from the timeline).
This doesn't happen with any other audio than my voice overs, but when I import the stereo audio into the timeline, it goes into A1 and A17 (I had 16 tracks of audio, none of them empty, so it created a new one just for the second track of my stereo audio). Or if I put the first of the stereo tracks into A2, the second one goes into A16, same for A3 it goes into A15, A4 and A14, etc.
I've looked through all the user preferences and there's nothing that will change it. I've tried unlinking them and that doesn't work (I assume because it's stereo audio).
Someone please help!
Thank you in advance,
ACC

You need to connect the Source "patch panel" buttons to the correct Destination Track.
In the illustration below the source audio 1 & 2 goes to destination 1 & 2:
In the next illustration, source audio 1 & 2 goes to destination 2 & 4:

How to configure stereo outs to mono via Mainstage?

I'm currently running Mainstage through my Presonus FireStudio Project. The outputs are linked together (i.e. 1-2, 3-4, 5-6), but i need to separate the stereo tracks into mono in order to run one track to monitors and a completely separate track to speakers. Also, when i select a track to go through a certain out like 1-2, it seems to not mean a thing because I can plug the speakers into any other out (like 3-4 or 5-6) and I still get signal. Why is this?

Ah! Thank you, Sir! It was so simple!
The applet control panel for my mixer had all the outputs linked!
Would you also happen to know if Mainstage can route certain tracks to solely the headphone jack in my AI? I'm using the Presonus FireStudio Project AI.

HELP PLZ Importing stereo sound into FCP brings it in mono and not linked!?

Hi, I am needing to import some sound which is stereo. On the flash card it came on I have channel 1 and channel 2...now being primarily a avid editor im used to selecting the both clips and it links together to make one when imported. I have found when I import these into FCP it brings them up as seperate mono tracks...I need them to be linked as i'll be doing multiclips for A and B cameras....
Also in my tracks section it says 2A for both audio tracks...Is there something im missing or I need to do in order to get it to work.
Thanks for the help

Hi, could you be more specific? I have tried marking in points on both channels 1 + 2 at the clapper board...I then dropped them onto the sequence separately and then selected that...then did the Stereo pair thing...however its not doing it...what is it im doing wrong?
Sorry to be pain...its all a little alien to me at the moment...

Stereo Audio channel turns to mono when I close and re-open the project

Hi there,
when I import a random video file with stereo audio channels and put it to the timeline (after peaking), everything works allright - the recording level window shows me the left and the right audio channel.
But when I save and close the project in order to re-open it directly, I only got a mono audio channel (left) and the stereo is away in my timeline and recording level window. The preview of the imported video ist still ok with stereo sound.
Is this a bug ? What can do? Please help me.
Thanks a lot

Are you clearing your recent history either manually or when you close Firefox?
Firefox stores App Tabs and tab group details in the same file that stores details of browsing sessions. Make sure that you have not set Firefox to delete browsing history. For details of the setting to check see https://support.mozilla.com/kb/Clear+Recent+History

Stereo audio rendering as mono

My husband and I recently purchased a MacBook Pro last November, recently installed Final Cut Pro 5 on it 2 months ago, and now we're experiencing audio problems we've never encountered before.
Fresh new project, new timeline, import a stereo audio file, double click and playing from the viewer it's perfectly fine, but put it on the timeline, shows up on two separate tracks and needs rendering, we render it and it turns into mono. It didn't do this before, we don't know what we changed, it used to work but now it doesn't. We must have changed something but we can't figure out what we did wrong. Even if we separate the stereo track into two mono tracks on the timeline, pan one left and the other right, it remains mono.
Please help, we're completely stumped on this one! Thanks!

The only problem with converting the audio files to 48 is that we have about 200+ audio files, living on about 17 layers, each with their own settings for speed and reverse and eq and more. Going back to reimport all that stuff would kill our deadline by about 40 hours = not possible.
But I did download that utility you suggested, it discarded our prefs, and now everything seems to be better. I'm having to "fool" FCP by placing an EQ filter set for 0 gain (i.e. no change) onto each clip, which trashes the render file, and when it rerenders it's ok, sometimes. For the ones that aren't changing out of mono I go back in and throw away that eq filter and re-render and then it's in stereo. Very strange. Also strange is that some of these animation clips now have 1 frame of black at the tail end before cutting to the next clip - very odd since the original files have NO black at all.
Something very strange happened.

FCP is turning my stereo audio into mono... bleeding?

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