Only left audio channel works

only left audio channel works

Go step by step and test.
1.   System Preferences > Sound > Output > Internal Speakers/Headphone
       Settings for the selected device:
       Balance:
       Make sure that the slider is set at middle.
2.    AudioMIDI Setup
       Applications/Utilities/ Audio MIDI Setup.app
       Audio Devices window
       Side Bar
       Click the Built-in Output.
      Make sure that CH1 and CH2 volume sliders are matched.
3. Reset SMC and PRAM.
     Reset PRAM. http://support.apple.com/kb/PH4405
     Reset SMC.     http://support.apple.com/kb/HT3964
     Choose the method for:
    "Resetting SMC on portables with a battery you should not remove on your own".

Similar Messages

Only One Audio Channel [Left]

I thought that my right channel was not working but after examining the problem, I have discovered that both audio channels work on my MacBook but they both only play from the left speaker. After playing with the balance in system preferences, both the right and the left channel play from the left speaker. Strangely, when I plug in my headphones, the left and right channels play as they should. Has anyone else had this problem? If so, do you know how to resolve it?
Apple support suggested that I reset my PRAM & VRAM, and I did, but it didn't resolve the problem.

Took my MacBook to the Genius Bar at my local Apple Store...
Bad News: It is a hardware problem that must be fixed, which means my brand new MacBook has to go away.
Good News: Apple is going to replace my MacBook with a new one. They're even custom-building it all over again from scratch. Very nice of them.
More Bad News: I am HUGELY inconvenienced because now I have to erase information from the MacBook that took hours to transfer, uninstall my upgraded RAM and downgrade it to stock, go several days without my new Mac because Apple refuses to ship the new one before the old one is returned, and finally invest even more time restoring information to the new Mac...shouldn't Apple compensate their customers for such a huge inconvenience? I didn't pay nearly $2000 to buy a broken computer only to return it and wait a week for another one.
Although I feel that the methods of replacing my MacBook could be handled much better, I am glad that Apple is at least replacing my machine (which is more than I can say for some other PC Manufacturers...cough HP cough).

IMovie App Only Exporting Left Audio Channel

Dunno what's up with this. My iPod takes video just fine, with stereo audio. When I export anything from the iMovie app, however, just the left audio channel is active.
Known bug? What's up?

yes, you are not the only one with this problem. I think we have to wait for another update sadly . But strange thing is, one of my projects successfully exported both channels, left and right. Trying to find the difference between these projects but currently I can't find any.

Hearing only one audio channel in source window & in timeline

Hi all,
As most of you I get a lot of footage where the audio is split - left channel for gun-mic\\front-mic and right channel for neck mic.
A lot of times I want to preview only one audio channel in the source window.
I cant find a way to do it.
Also whan I try to hear\monitor only one channel when the clip is in the timeline - its a problem -
the only way I know is by using the fill Left\Fill right effect - it is good when I do the final mix
but sometimes I just want to hear one of the channels.
without the tidius way of adding an effect just to preview something and then deleting it.
I'm sure there a way to do this - right?
thanks!

Thank you very much for replying
Select the clip in the Project Window and duplicate.
Select duplicated clip > clip > Audio Options > Source Channel Mapping.
Disable one of the channel and hit OK
Place this clip on the timeline and ALT + double click so it will open in the Source Monitor.
This is a very messy and unconfterble way to work - because I need to toggle this every time I want to switch channels to monitor.
Instead of adding the effect fill left/right you can toggle the effect on and off for the whole track in the Audio mixer.
This is a nice solution when I work on the timeline - but it won't help when I go on the source footage.
I think the only way to switch channels for a quick preview in premiere is by buying a Sound card with a channel switcher - or using a mixer...
so dissapointing...

Garbled left audio channel in MuVu Mi

When I attempt to play back MP3's with my MuVu N200, the left audio channel is completely garbled almost beyond recognition. This only affects music, not recorded wav's or radio signals.
I've tried formatting it, tried different files, different bitrate files, and I still have the same trouble. I've even moved files back onto my computer, and they sounded great.
Is there any known trouble with MP3 decoding?

Actually, eh, it was fine until I updated the firmware.
I'd go back to the OEM defaults (I really don't think I'll use it to play WMA files), but I can't find it anywhere on Creative's website.

Z30 left audio channel distorted

Hi!
The left audio channel on my Z30 started to sound distorted. At first I thought my headphones were broken but I tried several others.
I already cleaned the headphone jack.
Any idea what could be broken or if I can repair it myself?
Thanks

have you tried to insert the jack like 30 times?
I have dont that on older devices with good luck
if that dont work then maybe replace that part and many are on ebay if you device is out of warranty
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Millions of midi channels, only 4 audio channels

so when i'm in logic i can hold down on a channel, go to audio/ audio instrument and then select hundreds of different insert channels. great for midi
however there are only 4 audio channels to choose from! how can this be?
thanks

dear pp,
sorry...i couldn't resist. what's your interface and how many inputs does it have? if it's 4, then no more than 4 can be accessed at any given moment. if it has more than 4 then you haven't either set up enough audio tracks or assigned enough inputs (inputs 5+ per individual trks.) to the rest.

Losing left audio channel

My touch has almost completely lost the left audio channel, via the headphone jack. I can sometimes get a signal if I play with the connection. But more often than not, it's out. I thought it might be a problem with my headphones, so I bought a new pair, but the problem is still there. The problem is also there when I play music from my touch on my car stereo.
Any help would be appreciated. Thanks.

You have lost the Left Audio Channel when using the headphone jack. From the details provided by you, it appears that you have a hardware issue.
You can try performing a RESET and/or a RESTORE by following instructions [*_Listed Here*|http://www.apple.com/support/ipodtouch/assistant/ipodtouch/#section2]. (Note that if you perform a RESTORE then you will loose all data and will need to reload).
If neither of the above solves the issue then you will need to send the iPod Touch for service or take it an Apple store for evaluation and possible repair.
Axel F.

Compressor only exporting left audio channel in AIFF! Please help!!

Hi, I just realized that the files that I have been exporting using compressor have been only exporting the left channel of audio. I am not sure what the problem is and would appreciate any help anyone could give me, as I'm on a big deadline and need to solve this ASAP.
The way I've been doing it, is I right click on the sequence name in Final Cut Pro and select Export > Export Using Compressor. Then I selected the DVD Best Quality 90 Minutes option. The AIFF file that is created seems to only have audio in the left channel. The original files themselves are definitely stereo, and play both channels in Final Cut.
I really don't understand. The Inspector within Compressor shows this information for the AIFF file:
File Extension: aiff
Estimated file size: unknown
Audio Encoder: 16-bit Integer (Big Endian), Stereo (L R), 48.000 kHz
It says Stereo, so I don't know what the problem is! Please help!!!

Glad I could help.
Sorry for being a bit unclear, and actually misguiding you a bit on the reference files. Reference files are referring to the original media/render files. As long as you do not change the actual media/render files, you should be able to do changes to your FCP project. If you have not rendered before you export a QuickTime Movie reference file of your sequence, it will render on the fly and put the render files inside the reference file with the audio.
I would recommend reading more about self-contained files and reference files in the Final Cut Pro User Manual -> Volume IV -> Part III -> Exporting QuickTime Movies -> Choosng the Type of QuickTime Movie to Export
From the manual:
Choosing the Type of QuickTime Movie to Export
You can create two kinds of QuickTime movies with the Export QuickTime Movie command—a self-contained movie or a reference movie.
Self-contained movie: A self-contained movie contains the video and audio media— all of the data used to create your movie is within a single file. This single file can be safely and easily copied to another computer without worrying that you need other files to play it back.
Reference movie: A reference movie is a very small file that contains pointers, or references, to all of the captured clips used in your sequence. The actual media is located in the original media files. If you rendered your transitions and effects before creating the reference movie, then there are pointers to your render files as well. Otherwise, all of your transitions and effects are rendered using the current level of compression, and then embedded inside the resulting reference movie, increasing its size. All audio tracks, mixing levels, cross fades, and audio filters are rendered and the resulting stereo or mono audio tracks are embedded in the reference movie.
Exporting a reference movie saves time, since you don’t have to wait for every frame of your edited sequence to be duplicated. It also saves hard disk space, since pointers to other files require little space. Reference movies are particularly useful when outputting your sequence for compression using a third-party compression utility.
However, reference movies are not very useful as a means of delivering video files to other people. If you give someone a reference movie, you must also give them the original video files associated with that movie, which can be complicated since you may not know where all the referenced media is stored on disk.
In general, exporting reference movies increases the risk that the movie may not play back. Reference movies are best used when you have short-term uses for the exported movie file, and you only plan to use them on the system you exported them to.

Premiere CS4 - how to duplicate left audio channel to right

I am editing old footage in which the audio signal is on the left channel only - the right channel is empty. I want to duplicate the left channel on the right so the sound comes out of both speakers. In Premiere 2.0 this was easy: right-click on a clip, choose audio options, then 'Duplicate left', and that was it. I can't figure out how to do the same thing in CS4.

FAQ:How do I create mono/stereo out of stereo/mono audio?
Cheers
Eddie
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Only one audio level working

Hello,
When playing my video, it shows only the left audio level moving, therefore making my project come out of only one speaker. How can I get both audio levels to work? I thought I had stereo pairs - the audio tracks are linked. Thanks.

Please look at this thorough article on audio in FCP from Ken Stone.
It explains, among many other aspects, what panning is, and what the pan control does to your audio tracks.
Final Cut Pro Audio Essentials
Optimizing Sound For Beginners
http://www.kenstone.net/fcphomepage/audio_essentials_fcp4.html

Only one audio canal works

Hello folks, I've had my iPhone 3G for over a year now, but now the first problem has occured. When have my headphones plugged in, there is only sound on the left of them. The same thing happens when I want to listen to music through the speakers. Only one of them work. How can I get back to stereo sound?

The iPhone includes a single external speaker. The opposite grill that appears the same is the microphone.
Do you have access to another set of earbuds to try to determine if the problem is with your earbuds or with the iPhone?

760GMA-P34: VLC, MPC-HC etc. only Waveout audio device works?

any ideas on why I can only get audio through the waveout device with VLC, MPC, GraphEdit etc.? Using DirectSound as the device results in an 88890008 error. Running Windows Pro 8.1 Update 1 (64).
I can get audio in web browsers and running the windows control panel tools. Haven't tried any games yet. Not sure how the audio is being routed.
I have the latest Realtek drivers that apparently will work, 6.0.1.7293
I've tried removing the drivers several time to no avail. There was an odd bug in Win 7 referenced here to do with ActiveMovie, but it didn't fix it.
Any thoughts?

Nope, no codec packs.
I'm quite confident it's something to do with the installation of the Realtek HD drivers. The Realktek HD Manager only half functions, for instance you can change output/input uses of the jacks etc. but the audio tests within the application itself do not work; play or click on a speaker and it's silent. Go through the Windows control panel audio configuration though and the test sounds play through front & back speakers. Luckily, the default system path for the audio device works.
For most uses it's fine. The issue appears to be when an application doesn't use the default system audio device, but instead uses the DirectX audio path and doesn't allow one to alter from that. I'm guessing that the Realktek HD Manager tool is (ironically) going through DirectX, which is why it doesn't work. VLC does allow the audio output device to be selected (i.e. wave out) so one can make it function. But, for instance, I installed Cyberlink's PowerDVD yesterday and there is no audio. Likely it's trying to go through the DirectX audio device and there is no link there to the Realktek HD output device. PowerDVD (at least the version I'm using, 10) doesn't let you select which audio output device to use.
Unfortunately, the Window's DXDiag troubleshooting tool doesn't find anything wrong. I'll need to find some DirectX management tools and see if I can fix what I believe to be a broken link in the registry.
I'm guessing this is another case of drivers written for Windows 7 where MS made a slight change in Windows 8 that the driver installation doesn't address.
I'll try talking to Realktek as well but I imagine I won't get very far.

Only one audio channel in burned DVD

I've completed a slideshow project in iMovie, moved it over to iDVD and burned it. However, when I play the finished DVD in a standard DVD player, only the RIGHT channel of the background music plays. What am I missing? Thank you...

Yes, it’s centered already. Very strange. Don’t know what I did when I brought two-channel mono from one sequence to another that caused it to become a single mono instead of dual mono. If the quality does not suffer then I guess it makes no practical difference as long as the sound is coming equally from both speakers.
Thank you both for helping me out.

Logic pro 9, recording only six audio channels at once

Hello,
I want to record a life gig at club and need to record 10 audio channels parallel. But whenever I try to activate more then 6 channels for recording, other channels are switched off for recording. The interface Presonus Fp10 is ok. I can't find any help in the user guides. Any idea?

If you have a 10 input audio interface check you did assign a different input to each audio channel.

Only left audio channel works

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