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.

Similar Messages

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.

"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.

Problem merging clips automatically using audio waveforms

I am new to Premiere Pro CC and am trying to use CC's new audio synch feature. I'm following the steps outlined in this video http://tv.adobe.com/watch/learn-premiere-pro-cc/merge-clips-automatically-using-audio-wave forms/. Even though production used a slate, and camera has audio reference, I am unable to synch, and keep getting this message: "Could not synchronize one or more clips in the current selection because a match could not be found." Any thoughts?

It doesn't seem to work when you include a stand alone audio file. I'd consider it a bug.
https://www.adobe.com/cfusion/mmform/index.cfm?name=wishform

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.

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

Merged clips and modified audio channels bug/issue

My problem is that if I create a merged clip and modify it's audio channels Premiere (both CC and CC2014) does not respect the modification under specific circumstances. These circumstances are: if I use keyboard shortcuts or the source window buttons for overwrite/insert to cut the merged clip into a timeline. However, if I drag & drop the clip from the source window or from a bin into the timeline Premiere will respect the audio channels set through modify audio channels.
Here are steps needed to create my problem. You will need a video clip and an audio clip with at least two channels to reproduce this.
1. Create a merged clip from the video and audio. Does not matter if you have "Remove audio from AV clip" enabled or not.
2. Right click on the merged clip in the bin and select Modify -> Audio Channels.
3. Set the merged clip's audio channels to Number of Audio Tracks: 1, Channel Format: Mono. Set the source channel for Audio 1 to anything except Channel 1. Click OK.
4. Make sure you have the merged clip open in the source monitor. Use keyboard shortcuts (. or ,) or the insert/overwrite buttons in the source monitor to cut the clip into a sequence.
5. The merged clip in the sequence will use channel 1 for audio, even though it has been set to use another channel.
6. Now try drag & dropping the merged clip from either the source monitor or from a bin into the sequence. It will now use the audio channel that has been set through modify audio channels.
My workaround is to use drag & drop for now for affected clips, but in the long run this is a pain in the backside.
My question is if this is something that affects other users as well. And while I'm waiting for a fix, if anyone has any suggestions on how to get modified audio channels to work properly, I will gladly listen.
I have filed a bug report for this. I have reproduced this on multiple Windows 7 machines with Premiere Pro CC and on two Macs with both CC and CC 2014.
EDIT to add: I have been in discussion with Rameez from Adobe about this through the support chat and have been told that this is working as intended. He suggested I post a thread about it to see how other editors feel about the functionality. I personally feel that the way it works now makes no sense at all. If others feel the same way, maybe this issue can be fixed in a future update. So please make your voice heard.
EDIT to add: In most usage this might not be an issue at all. But if for example you have external audio on multiple channels and to make sure you have a clean timeline, you wish to remove extra tracks from your merged clips and those extra tracks happen to be any track before the last one(s), you will find that editing the merged clip in in any other way than drag & dropping it in the sequence will result in you losing those last tracks instead of any tracks in the middle that you have disable through modify audio channels. I would think that the audio channel modifications should work no matter what way you cut the merged clip in.
Message was edited by: Jaakko Rinne

Going to try, but here is my workflow and have not encountered any problems until this last P/U days footage. I've been doing things this way because I found having all files in the project was causing it to crash constantly when I was working. I have a new I7' processor IMac with 24 gigs of RAM. And since Premiere does not allow you to have multiple projects open at the same time (Wish this would change. Avid and FCP both allowed multiple projects) I have to do things this way.
Pre-workflow Project File
Label all Video and Audio files to match Scene #'/Takes
Set in points on all video and audio to reflect slate
Merge Clips
Working Project File
Import only Merged Clips into Project. Either via import or copy/paste
Now I've done this workflow from just about the very beginning. Deleting all of the original source video and all audio clips from my working project so only my bins containing my merged clips remain. Have had no problems and edit has been smooth. Did a pickup day last week, followed same steps as I've done in the past, imported the merged clips into my working project and the clips have the audio set to none by default. Now once I go into the sequence I can manually set it and it's there but I cannot play audio in the source monitor which is how I edit, there's no reason I should have to go back to the crappy FCP way of editing doing the copy and paste from a sequence.

How do i make my clips have stereo audio again?

I've been building a project and i'm about half way done. All of my video clips were imported with stereo audio and until now they have been stereo when i drag them down to the timeline, but for some reason, now when i drag them to the timeline they become mono tracks. They are still stereo while they are in the browser, though. Even when i drag a clip that i used earlier in the timeline (when the clips stayed stereo tracks) it comes up a mono track. Did i change a setting? or is there something i'm not doing or doing different? How do i get my tracks to be stereo again?

Do two tracks go to the timeline or one? Are both tracks connected in the path panel at the head of the timeline? Are the clips stereo pairs or dual mono?

"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.

Merge clips and preserve audio clip names?

Hey Guys,
I'm about to start editing a new project of mine that I just shot. I used Premiere to edit my last project and loved it, save one problem I had after using the "Merge Clips" feature to sync my audio. In order to save time, I used Merge Clips to sync my picture and sound rather than do it manually. The feature worked really well, but I didn't notice until it came time to export my OMF that the "Merge Clips" feature had renamed all of my audio clips to the same name as the video clip it was sunc to. This resulted in many broken links in the OMF.
Is there any way to use "Merge Clips" or a feature similar to it, that preserves the names and metadata of the master clips you're syncing? I might just do it all by hand to be safe.
Thanks,
Joe

I do believe we've uncovered (yet another) bug. For the life of me, I couldn't get a video to sync to its respective WAV. The audio from both sources was clean and clear; if Premiere couldn't auto sync this, it couldn't sync anything...
Then the funny part: it could sync everything else together perfectly (DSLR, GoPro, HDV). I must admit I was impressed, GoPros record fairly horrible audio- but Premiere managed to sync them accurately and quickly with the other cameras. It just treated the external audio as foreign and refused it.
Can someone from Adobe chime in? I'm here for questions.

Merge Clips w/ Synced Audio, Tracks Map Weird

I've synced some clips in a sequence. There's the camera with camera audio, then 3-4 discrete audio tracks from different files. When I click those clips and "Merge" them into one, then I open the clip created in the Project Panel, then look at that clips Mixer, the audio tracks are not in order they were in the sequence. They are in fact in no order. The camera Tracks which are on 1+2 in the sequence can be 1+5 or something with other audio tracks or dead tracks in there. I want to merge the clip and have the newly created file in the same order as the sequence. How do I do this? Thanks

I honestly don't know, I just don't use Merged Clips frequently enough.
But I do know that the track order for audio won't change the final output, like it will with video. So..why worry about it?

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

Merge Clip using "Audio" function

The merge clip using the audio parameter works occassionally. I shot dual system with a slate, camera mic on a RED for scratch audio and multiple inputs on a Sound Device 744t. Some of the clips merged great, but some of the other ones didn't work at all. Even when there were shots within the same setup but just a different take, some worked and some didn't. Are there best practices in terms of how to use or configure Premiere Pro to match those clips better? Any parameters I can use to adjust how it analyzes the clips?

I'll add a third motion to this thread. There are several features of the new Premiere CC that I was looking forward to, but the "audio syncing" was by far the most exciting to me as it would save me several steps in Plural Eyes (and $200 bucks). So when I downloaded CC, this was, of course, the FIRST new feature I tried out. First, I selected multiple takes from various cameras (3 cameras, Canon HF G20 [AVCHD / MTS] and Canon EOS 7D [MP4 / MOV]) and audio recorders (320k mp3 voice files [I have my reasons for this project ]). I right click and select "Create Multi-Camera Source Sequence". I select "Audio" as the sync method. Premiere goes to work attempting to sync all sources. I am excited because it seems to be racing along much faster than PluralEyes. When Premiere finishes, it leaves me with a new Multi-Camera Source Sequence that has a separate track for every take. I'm not shooting one continuous concert for 2 hours, I'm shooting reality footage. This means that during a 3 hour event, my camera operators might start and stop recording every 20 minutes, or run for 40 mintues, etc. We try to get sync points (clap sync from the same source) either at the beginning or end of each run. The audio recorders, however, run for the full 3, 5, or 10 hour run. PluralEyes is amazing at handling all of this, with *almost* perfect results; I'd say 95% success rate. But in my experience, running the same footage through Premiere's new "sync on audio" feature (whether creating Multi-Camera Source, or simply Merging clips [as in this thread]), I get aproximately a 99% failure rate. I'll end up with a completely messed up timeline with each camera spread out across 5 video tracks (3 cameras x 5 takes = 15 tracks of video). Each camera also has it's own set of audio tracks (2 for stereo) and each mono audio recorder gets another audio track. So I've got something like 20 or more tracks of audio. This would all be fine, I suppose, if they were at all sync'ed to eachother in some recognizable way. But they are not. Not even close. Not even in a way that resembles the most feable *attempt* to synchronize these sources.
I'll try to post a video later today, to show the above workflow. While there are many new features that made upgrading a "can't wait" proposition for me, THIS feature was hands-down the most promising for my reality-style workflow.

Stereo audio export showing as mono

Hi,
I've been encountering an issue with exporting stereo audio from Premiere CS6 (v. 6.0.5) and After Effects CS6 (11.0.2.11). When I export a clip with stereo audio from Premiere or After Effects (usually to ProRes or Uncompressed QuickTime), the resulting file will show as having dual-mono audio in FCP7. When I check the file in QuickTime 7, QuickTime 10, MediaInfo, Premiere, After Effects etc., the audio is tagged as stereo. But when I bring the clip into FCP7, the audio shows as two separate mono tracks.
While this isn't a problem if I stay within Premiere/After Effects, it does become an issue when I need to work with the clips in FCP7 (they have to be relinked as audio pairs in the timeline), and one of the external distributors I work with has come back saying the file we delivered did not have the audio properly linked as stereo.
Am I doing something wrong here? I don't want to have to workaround by putting everything through FCP7, as we are really trying to keep our workflow within the Adobe suite and retire FCP!

Hm, not from what I've seen. Anything that's been exported as stereo through FCP, Compressor, MPEG Streamclip, Episode etc. shows up as properly linked stereo in Final Cut.
I just ran one of my Premiere exported files through MPEG Streamclip to the same format (ProRes, uncompressed stereo audio) and it showed up as having a linked stereo pair in FCP7, while the original showed 2 mono tracks. I am definitely exporting from Premiere with the stereo option selected (and stereo source audio).

Audio missing from Merged Clips

Okay, editing a feature film on Premiere CC. Just imported a project into my working project that contained the merged clips I created using my video (Red footage) and 2nd source audio. Files had been all renamed in Premiere to match scene/shot numbers. Kept only the merged clips, deleted everything else from working project folder, as I had for all the other clips that work perfectly fine. Edited the new clips last night, working perfectly.
Reopened project this morning to continue working, and now all of the clips have dead tracks as in no audio. The actual tracks are there, but there's no sound. I doubled clicked on just the audio track in the clip in the sequence and it's red in my source window.
How can I fix this?

I'm using the same workflow and reproduced the bug in 7.2.1. The issue is cut & paste of the merged clip.
After merging audio and video clips I would select the newly merged clip in the project bin, hit cut, select a different bin, and hit paste. The merge clip gets moved to the new bin, but also gets corrupted. From now on, the merged clip is missing audio information. When placed on the timeline, audio tracks are colored red and show no wavefrom. Even "Link media" can't properly associate the merged clip with the audio again.
To reproduce the bug, It's not necessary to delete the original clips that were merged, nor is it necessary to save and reload the project. After cutting & pasting the merged clip is damaged immediately.
Easiest workaround for now is to use drag & drop to move the merged clips to a different bin. That does not corrupt the files.
Hopefully a staff member can notice this thread and report the bug to development.

Merging clips turns stereo audio to mono

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