Audio - left / right channel balance

Is there a way to correct the balance between the left and right audio channels in iMovie 08? I have some video in which one channel is significantly hotter than the other - and I would like to get a good stereo blend, of course....
Is there a solution?

Thanks Bengt...
So..
1) I extracted audio, fixed it, and saved it.
2) I made a copy of the video with the (bad) sound deleted.
Now - it's a 60 minute video, but I want to be able to cut it into several pieces. So, do I have this right?
a - create a new project with the video
b - add sound
c - export as movie
d - create a new event with the "fixed" movie (now with the adjusted/corrected sound)
e - create the new projects (the severals pieces I want)

Similar Messages

Left /right Channel balance

Not a specific Logic question as such, more a general one on sound balance. Have been using a pair of Klipsch speakers for about a year now and have started noticing a decided swing of volume to the left hand channel when everything is set to centre like drums etc. Tried swinging a drum snare to the left and right and the right hand channel is just so much quieter to the point of al most losing the snare ! Tried it on my headphones and its the same. Could my mac be giving a hiccup?
M

Hi,
You might do well in calibrating your audio outputs.
Here's a quickie:
1. Turn OFF your speaker system. Failure to do so will not only blow them up, it might get you evicted...or thrown out from your parent's...or the neighbor going after you with a shotgun, you get the picture. I won't be held responsible if you skip this step, and become deaf as a result.
2. Open a blank Logic song, and make 1 track. Insert a tone generator plug-in,and set it to 0dB (the maximum output level). Make sure the pan is set to centered.
3. check your audio device's output level meters. they should MATCH. If not, there is an issue with your audio device. consult the mfr to get this fixed ASAP. If this step is ok, move on to no.4.
4. If you have a mixer after your audio device, look at the INPUT GAIN on the channels that your main outputs from your audio device are fed into. Put the left channel into SOLO, and calibrate the input gain so it clips, and tehn back it off just slightly, until no clipping occurs. Do the same for the right channel.
5. Set the OUTPUT of the mixer faders to 0, and pan each channel hard left and hard right, respectively (ch1 left, ch2 right, etc.)
6. Look at the mixer's OUTPUT meters. Do they match? If they do NOT match, you need to contact the mfr of the mixer, and have this fixed ASAP/ If they DO match, then proceed to step 7.
7. Look at the amplifier that your speakers are hooked up to : does it have an INPUT gain knob? If it does, then you can calibrate your speaker amplifier. If it does not, REPLACE this speaker amp with one that DOES have input gain knobs. If it does have input knobs, you now can calibrate the speaker levels. Go to step 8.
8. With a good SPL (Sound Pressure Level) meter, place the meter on a mic stand or other sturdy device, and place it in your mix position, pointing towards the exact middle of your speaker spread (exactly between the speakers). Turn the meter on, and set it to read 80dB sensitivity.
9. Set your mixer's monitoring output (the one that turns the output up and down to your speakers) SLOWLY... until you get 80 dB on your meter.
10. MUTE the right speaker output. You can do this on your mixer, by muting the left channel. then turn up the monitoring level up until you get the same 80dB. What is the level difference? Note this.
11. MUTE the left channel, and turn on the right channel. turn up / down the monitorin levle until you reach 80dB. What is the difference? not this too.
12. On the speaker gain knobs, notice where they are BEFORE you calibrate the speaker amplifiers.
13. Put your monitor level back to about 10 am position. This one is the one on the mixer. NOt the one on the speaker amp!!!
14. While still on the RIGHT channel only playback, notice where the level meter is now. Adjust the RIGHT speaker input so that it reads 80dB upon playback at the 10am position on the mixer monitoring knob.
15. MUTE the Right playback, and turn on the Left channel playback. notice where the level meter is, and adjust the LEFT speaker input until you get the 80dB.
16. Now, turn on BOTH Left and Right channels, and it should be louder than each channel separate.
17. Adjust the monitor level knob on your mixer until you reach 80dB. MARK THIS SPOT.
You now have a calibrated listening system.
Enjoy

How can I slide detached audio left/right in sample increments, rather than frame increments?

I exported a detached audio file from FCP X to Pro Tools for processing, and I have now imported the processed audio file back into FCP X.
I need to align the processed audio clip with the original audio clip. I am using View --> Zoom to Samples, and can see the amount I need to slide/nudge the processed clip in the Timeline. The problem is that the mis-alignment is smaller than a frame. This sounds small, but it is visually clear when you play the video/audio that the video and audio are not aligned.
Question:
How can I elect to slide the audio left/right in the timeline in increments of the audio samples, rather than in increments of video frames?
Since FCP X allows you to view the audio in Samples, it certainly must somehow let you slide/nudge the audio in Samples........I just haven't found it.

Let's be clear about one thing. There is no way on earth any human being can percieve a one frame discrepancy in sync at a frame rate of 24fps or higher. Going to increments smaller than one frame, while it can be done, makes no difference to the way the media is viewed. Presumably your viewer will not have the benefit of multiple synced waveforms as a guide.
It sounds like you have an alignment problem in ProTools. This should be a incredibly simple to fix in that application.
The problem may laos be one of sample rate difference. What are the specs of your export audio file from FCP and the specs of your imported replacement file coming from ProTools. They should line up exactly if the sample rates are identical.

Left / Right Channel Audio mixing?

How do I mix the audio between the left and right audio channel?
I have a bunch of tape imported, but the audio is only in the left channel, so I need to either balance the audio, or duplicate the audio in the right channel... thanks in advance!

You should be able to do this by 'Exporting' your movie to GarageBand, and just making the one-channel audio the same on both channels.
Alternatively, if you want to do extensive tweaking manually, do the following:
0 - Download an audio editor such as 'Audacity'.
1 - In iMovie, select the video clip(s) which you want to 'repair', and then use 'Extract audio' to separate the audio from the video.
2 - Close iMovie, and use the usual Finder to locate your movie project, then Ctrl-click (or right-click) on the name of the project and choose "Show Package Contents".
3 - Look in the 'Media' file which then appears, and you'll find all your audio clips. Copy them to your Desktop.
4 - Start 'Audacity' and use File and Open to open the audio files, one by one, which are on your Desktop. Use these hints (intended for 'Sound Studio, but they work with 'Audacity', too, so click on 'Start Slideshow') to copy and paste one channel onto the other, then Save your work.
5 - Take those newly amended files on your Desktop, and copy them back into the 'Media' folder within your project (see 2 and 3, above).
6 - Reopen iMovie; the audio will now play correctly.

Creating audio in right channel

I know this has GOT to be simple.
I'm new to Soundtrack after a couple of years using Adobe Audtion. However, I can't seem to duplicate the left channel and plaste it into the right channel.
I have a recording that was only recorded in the left channel. I simply want to put the same recording in the right channel so it balances out in both speakers. In other applications, it's just a matter of cutting and pasting. Not so with Soundtrack Pro. What am I doing wrong?

Marc actually this one thing takes some manual skills. This is what you have to do: start with the timeline at the beginning of the segment you want to copy, and make sure you have your end point also [you can use add marker].
Then take your mouse just above the waveform until you see a small letter indicating L for left on top, R for right on bottom of waveform-click. You'll see half the waveform go blank, that's deselected. Now press shift and the right arrow key until you've got your audio selected, then you can copy/cut and paste.
[if your audio is in the middle it'll help to zoom out first and mark your start and end points then zoom back up closer so you don't have to hold the shift key for so long and the little bar on the bottom can be stretched and shrunk to zoom out/zoom in.]
Power Mac G5 2GHz iBook g4 1.42GHz Mac OS X (10.4.7) 2.5GB ram 500gb Micronet Platinum, Lynx AES 16XLR

Export - h.264 put all audio in right channel

I have a 1080p 24fps project that is set to the default surround sound ProRes codec settings. When I did the Share:Export and selected ProRes as the codec, it exported perfectly. When I selected h.264 from the pop-up, it put all the audio on the right channel. The workaround I used was I fired up Compressor and made an h.264 version of the large ProRes version. However, is there something I should know about that I can do that will allow me to export it directly to h.264 from FCP X?
Thank you!

Marc actually this one thing takes some manual skills. This is what you have to do: start with the timeline at the beginning of the segment you want to copy, and make sure you have your end point also [you can use add marker].
Then take your mouse just above the waveform until you see a small letter indicating L for left on top, R for right on bottom of waveform-click. You'll see half the waveform go blank, that's deselected. Now press shift and the right arrow key until you've got your audio selected, then you can copy/cut and paste.
[if your audio is in the middle it'll help to zoom out first and mark your start and end points then zoom back up closer so you don't have to hold the shift key for so long and the little bar on the bottom can be stretched and shrunk to zoom out/zoom in.]
Power Mac G5 2GHz iBook g4 1.42GHz Mac OS X (10.4.7) 2.5GB ram 500gb Micronet Platinum, Lynx AES 16XLR

Line In Recording Left/Right Channell

I hav an XFi-Titanium. I select the "Audio Record Mode". Then I record something with a Keyboard that's only on the Right-Channel. While I record something I hear nothing. When I stop the recording and play it afterwards, I hear the sound I recorded and its ony Right Channel like I wanted it to be. Line In is switched on and when I put the intrument on both channels I hear Music li've? while playing on the Instrument. If I put the Intrument on the Right Channel I hear nothing while playing li've. Only after recording I hear what I played on the Right Channel. My Question is why I don't hear the Right Channel while playing li've (When the Instrument only outputs a Right Channel sound) and when I record the same thing and then push play on the record programm I hear the right channel. So if I want to edit a multiple track song and for example put a Piano on the right channel I can't hear anything while playing on the Keyboard. I have to record it to hear what I played. So the right channel doesn't work li've. If I switch the Piano Sound to the Left Channel it has the same effect as putting the Piano Sound on both Channels. (I hear the Piano out of both Speakers)
Any Ideas why this isn't working li've, only working after recording?
gargamosch

)Re: Line In Recording Left/Right ChannelleI use Adobe Audition. I played arround with my settings and found out that to mute the right channnel or unmute it does not effect the li've-playback of line in. Only the left Channel (mute / unmute) has an effect. So if I put an Instrument on both channels, both channels go through the left channel while playing. If I put an Instrument only on the rigt Channel I hear nothing. If I put an Instrument only on the Left Channel I can hear it. So for li'veplayback only the left channel works. Recording uses two channels. I found out in the Audio-Creation Console of the Xfi- Titanium that, looking at the Playback Volume Meter, only the left channel shows something, while? the Record Volume Meter shows something on both channels. It seems that the Soundcard handles realtime-playback of line in and recording of line in different. Realtime - playback of line in seems to be mono while line in recording seems to be Stereo. Is there maybe a switch or a setting to get realtime playback of line in to stereo? Is it a driver problem and realtime Stereo isn't supported by line in on the X-fi?
gargamosh

Ipad Crosstalk - Left/Right channel separation bad when loud

Using an IPAD 2 with iOS6 and Garage band I find that if I pan all the way to the righ (or left) that I can still hear some of the sound in the other ear. Is this cross talk due to the amplifier, is there anything that can be done about it?
I have tried different headsets and professional grade wires/headsets and it still happens so I think it is due to the ipad.
I have tried different software packages aside from garage band and it still happens.
It only happens at loud volumes and in this situation if you leave both headsets in your ears you can't tell there is a channel bleed, but if you take out the loud one you can still hear it in the non-test ear.
Suggestions? Solutions?
Thanks.

WAIT. I've tried the Mono Audio setting and I think it sounds normal now. I used this video to check out how the left and right channels are doing. ( http://www.youtube.com/watch?v=hTvJoYnpeRQ )
Without the Mono Audio setting, the left channel is clear but nothing at all with the right one. Once the setting is on, I can hear both channels correctly. Is it because the speaker of the iPad is only one or mono speaker, or will it sound stereo even if it has one speaker?

Adjusting left/right sound balance

I have some "play along" music tracks to practice playing musical instruments with. Many have just drums, bass and piano, with bass and piano panned to extreme left and right. To practice bass, for example, one adjusts the balance to extreme right to remove the bass part from the recording. I have not found a way to do this on my iPod or on iTunes. Is it possible?
Either playing the right channel only (this is what a traditional balance control would do) or playing the right channel through both stereo channels would be good solutions. Alternatively, can one preprocess the track in some way to replace both channels by the right channel in the sound file itself?
Unfortunately it isn't possible to adjust the balance on the iPod dock (with speakers) that I'm using.
Many thanks in anticipation

Well, keep experimenting with the left/right panning and the various parameters you can program into the reverb effect!
There are no rules with regard to recording and mixing, but traditionally the bass drum, the bass guitar, and the lead vocal are mixed in the center, and the other instruments and harmony vocals are spread out to the left and right to varying degrees. The different drums in the drum kit are often panned to different positions mimicking the physical layout of the drum kit (left to right).
As far as reverb goes, realize that you can set different amounts and kinds of reverbs on different instrumental and vocal tracks; you don't have to send every instrument to the same stereo reverb effect. If you do so, you'll lose the ability to position sounds where you want them to be. The other element is the wet/dry mix. When you send a sound to a reverb effect, you decide what percentage of the signal goes to the effect (wet) and what percentage bypasses the reverb and goes straight out to the left and right speakers (dry) according to the pan setting for that track.
Listen to your CD collection. Pick some music that you like that is similar in style to what you are recording. Play a song over and over again and take note of where each instrument is placed in the stereo field. Then learn how to replicate that effect in your GarageBand tracks using panning and reverb. Studying well-recorded music is the best way to figure out how to do things on your own.

HUGE audio problem - Right channel only?

Editing i hear both channels or atleast 1 channel split. Regardless, after i export all of my clips except some sound loops/musc is on the right channel... What happened?
Had a video where only some clips(coincidently from a certain camera) were all right channel where as all other clips where both channels.
Confused. Give me some help over here.
Thanks

You got it!
That solved evrything.
Now my next audio thing is that my footage will come in one one side(left channel) so i have to put it from stereo to dual mono. However that is due to a setting of recording on my cam im sure.

ITunes: Left/Right Channel

ITunes question: right/left channels
I play guitar and bass and have an assortment of instructional CDs. Many of these CDs are set up with the full band on one channel and the featured instrument on the other. The idea being that you can turn off the part that you're learning in order to play along with the rest of the recording.
Other music players I've used in the past have had the option of playing one channel or the other through both speakers. I have yet to find this feature in iTunes. Can the iTunes player do this, if so, how, and if not, can anyone recommend a good player that can?
Thanks!

The freeware program Audacity will let you listen to just the left or right channels, or any mix in between. Audacity is an audio file editor, not just a media player. If you want to listen to AAC or Protected AAC files, Audacity won't work. You would have to convert them to mp3 files first. Besides mp3s, Audacity also supports wav, aiff, and oog vorbis formats. You would open the file from the cd in Audacity. You could then set the cursor as a starting play point of a passage if you want to get down. Just choose Don't Save when you quit.

Imported track...switching left/right channels

I have a track imported to GarageBand, and i have two questions. I don't know if either can be done through GB, but i'll give it a shot...
1. Can i switch the left and right channel, so that what was originally sent to the left channel will be on the right instead, and vice versa?
2. If i have a stereo spread that is too wide, can i move the spread closer to the center? I don't want complete mono, but i do want a tighter stereo spread that moves the instruments closer to the center.
Mind you, this is not a track i recorded on my own. It was an imported track from iTunes, so i can't go into the song, and separate individual recording tracks. The only thing i have to work with is the right/left channels in the song.
thanks very much.
paul

i THINK i know what you mean... i'll give that a shot and see if it works. It seems to make sense, so we'll see! Thanks for your advice...much appreciated.

Left & Right Channels Reversed

I recently imported a classical CD to my iMac, using iTunes 8.0.2. The left and right channels of the imported files were reversed. I proved this by playing the original CD, in which they are not reversed though they are in the iTunes file - whether played on the iPod or directly.
I have noticed a similar thing sometimes upon downloading music files from the Internet, but it only happens now & then.
Is there a reason for this? Is there anything I can do to correct it?

Put the left speaker on the right side and the right side speaker on the left?

Left/Right Channel Bleed? Discrete Separation Possible?

I have a need to playback stereo music files with discrete L & R channels on both iTunes and iPod devices. When I output these files from ProTools, the left and right channels are discrete. However, when I play them back from iTunes, listening to just the left or right channels alone reveals bleed from between the channels, which is unacceptable. The only work-around I have fund is to pull out an old portable CD player and hook it directly to the amp. The same CD in iTunes simply does not produce discrete tracks out of the Mac or once converted to MP3s, the iPod.
Is there some setting that must be adjusted to prevent this cross-over bleed in iTunes and in particular, the iPod? Or are these devices incapable of producing discrete L/R channel separation?

Bump

Playing different sound, left right channel

Hi,
Basically what I'm trying to do is to play 2 different sound files (.wav) in stereo, but through different channels.
sound file A - left sound channel
sound file B - right sound channel
These files should be playing at the same time.
If this is not possible, is it possible with 2 soundcards?

Hi,
Basically what I'm trying to do is to play 2 different sound files (.wav) in stereo, but through different channels.
sound file A - left sound channel
sound file B - right sound channel
These files should be playing at the same time.
If this is not possible, is it possible with 2 soundcards?

Audio - left / right channel balance

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