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.

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Noob.. GB '08 on MBP Won't Record Right Channel Audio

Hi, I'm a noob to Macs so please forgive me if I've missed something obvious.
I wanted to do some light, goofing around with GB '08 V 4.1.2 with my Roland V-Drums. The Roland V-Drum module output uses two, 1/4" jacks (a "Left" and "Right" channel) which I have coming together in a "Y"-shaped stereo adapter, plugged into my MBP (Latest Leopard - bought new last week - 4 gigs of RAM, updated all OS & GB files 3 days ago) and for the life of me, I cannot get anything to play in the right-channel audio *but only when recording in GB* - otherwise both audio channels work fine.
My Roland V-Drum unit can do mono by simply using one of the two designated Output channels; then I use a mono plug instead of a stereo. Even then I only get my drums recorded on the left side!
I've gone into every obvious configuration setting I can find - both in System Preferences>Sounds and those within GB '08, but for the life of me, cannot find where I've set something wrong. I've swapped cables and adapters. I've also tried speaking into a microphone plugged in and the same thing happens when recording in Garageband - only the left channel gets any sound. If you pan the result to the right, all the sound just goes away.
Anyone have any suggestions to try? Is this a bug? TIA...

Snud wrote:
Thanks to all. - But Matt, I know you just solved the "built-in stuff not working problem"! You certainly win whatever Grand Prize goes along with diagnosing "Drummer Dysfunctional Disorder". Your suggestion most certainly works with the built-in stuff - Thank you!
Your welcome and... I'm pretty sure the award for curing Drummer Dysfunctional Disorder is a combination Nobel Prize + sneakers with the Nobel logo embroidered onto it, which is really great since I could use a new pair. I'm only grateful that this didn't occur last year because I would feel terribly guilty if my own award interfered with Al Gore's since, as I have read, he is also thrilled by the complementary sneakers.
Now see if Apple was really smart, they'd have the *opening screen* of GB ask: "Are you a drummer?" and if you answer "Yes", well that would take us to a much simpler version! Hmm... Perhaps I could design it for them - or be the "Test Monkey". But I digress...
I'm guessing your humility is not exactly warranted... but perhaps an even easier version could be developed and named something like, I don't know, iTunes?
I'm happy to report that, thanks to you Matt, my stream of obscenities is not only causing the LED to register but... I can *record them in stereo* too! I'll try your final suggestion after I sleep on it. Today, the built-in mic... tomorrow, the world!
Words to the wise! (particularly when recorded in stereo and including obscenities)
(I still hope it's ok to leave this as "unanswered" until I try recording my drums instead of the built-in mic, tomorrow)
I suppose there's a sort of philosophical appeal to leaving all questions unanswered: for what is knowledge, and what can we truly know? But now I digress...
So back to your Garagebanding.
The thing is, if you can get your internal mic to work just fine, stereo and everything, that lets you know that at least your system is working, and that there isn't a bug that's crawled into it and is messing things up. Knowing that, you can narrow down your search for the culprit. If the internal mic works just fine, and the software works just fine, what is it about your original setup that's broken?
I would go back to the notion that the computer never received both channels of your output (its input) to begin with, and that perhaps the physical plug is either mono or, by virtue of its shape, not able to properly seat itself in order to make contact on both channels. That's just a guess, but at least the search for the culprit has been narrowed down to likely suspects.
(One possibly helpful distinction: a mono signal can record to both channels through a stereo minijack, but perhaps if the minjack itself is mono - or not connecting to both channels of the input - the signal (stereo or otherwise) might be restricted to one side?)

Headphone jack no right channel audio

So recently the right channel audio stopped working for my headphone jack. Any Ideas on how to fix this?

I found a temporary solution :
1) Open the registry editor (Windows key + R, then enter "regedit")
2) Go to this directory :
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96C-E325-11CE-BFC1-08002BE10318}\0001\Settings\Drv7246_DevType_0892_SS146210c7
or something that looks like that
3) Change the settings as following :
Pin 14 : 02 00 00 00
Pin 18 : 04 00 00 00
Pin 19 : 04 00 00 00
4) Restart
5) Check if it applied. If it doesn't, try again. Sometimes it doesn't work at the first try.
It actually remaps the Mic-in jack in a audio output. The sound coming out is a bit lower than the original output but it's still better than the crappy sound I've had since the headphone jack became a piece of .

16 channel audio mixing

Hi
I'm building a unique multi channel audio mix for a synchronised projected video installation.
The most sensible way for me to mix my audio is in a 16 channel audio sequence.
But I cant see how to save off any form of the final edit.
The only save options I see are stereo , mono and 5.1 .
Anything in channels over these options are just ignored.
So a stereo export will ignore all channels from 3 to 16.
And 5.1 will not export any audio channels above 6 etc
And mono will not let me sellect which audio channel is chosen and there is no 16 channel save.
Is it possible to save off each channel as a mono file?
I am confused as to why you would offer this option if it cannot be exported even as 16 mono channels.
thanks rem

Gonna try to break this down so that anyone could understand.
You have 5 different video programs, apparently with no audio, that are going to appear on 5 different screens. Is that correct?
OR... did you create one video program that has 5 pictures in it... like picture in picture x 5?
You want 5 different stereo audio programs that you are going to somehow synchronize while these videos are playing... does that mean that you are going to be raising and lowering different audio programs to highlight different videos programs?
OR... is it all going to play at once?
You're either a genius or clueless as to how things work. Why don't you draw for us a picture so that we can better visualize what you're trying to do?

Mythtv right channel audio squeel

I'm having a problem with mythtv and audio. For some reason, when I view TV in myth or record it, I get an high pitched alternating squeal which spurts for about a second and then stops for a second and so on.
I'm using a old bt878 card patched into my sound cards audio in jack. I have tried patching into both the mic and line in jack and both produce the squeal. However, I don't think it is a hardware problem. When I test the system using kdetv, there is no squeal at all. When I unmute line in using alsamixer so that I can hear both the live audio and myth's recorded audio, only mythtv's audio has the squeal. Using alsamixer to turn the master volume down to 0 in the right channel removes the squeal (but also right channel sound). However, using alsamixer to turn the recording device down two 0 in the right channel does not remove the squeal, but only removes the right channel audio.
I honestly don't know what the problem is. Could it be a mythtv recording problem? Could it be a codec problem? Could it be a DSP problem?
Is there some way I could test DSP to see if the squeal exists there?
Any other suggestions?
Thanks,
Colin

Ok, Í've done a little more fooling around. I changed the recording profile sample rate to 48000 which helped a fair amount. Now the squeal doesn't switch on and off. But now I get this weird thump noise about every 4 seconds, sort of like a static blip. Again this doesn't occur in other programs from mythtv. Any ideas?
Colin

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.

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

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?

Defective Right Channel Audio Post Fluid Accident

My MBP 15" A1211 received light spillage. The apparent damage was limited to loss of the keyboard backlight on 3/4 of the panel and, of greater concern, effective loss of the right speaker. Audio does pass, though far too faint and distorted to be useful. The left speaker/channel functions as per normal. Last night I successfully replaced the combined speaker assembly yet the same symptoms remain with no change. My knowledge of the guts of my machine is slight though growing.
Where should I go next up the signal chain to trouble shoot? Is there a dedicated audio amp onboard between the logic board & the speakers? Any suggestions would be greatly appreciated.Thanks
Sidenote: outside of my stated problem, all other hardware/processes have functioned normally without issue since the accident.

Welp guys, it wasn't alsa at all actually. More of a PEBKAC actually. Somehow, my cable for my headphones wasn't plugged all the way in to my computer. Thanks anyways!

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?

No right channel audio on import from stero videos

When I import files using the import from camera command I loose the right channel from my videos but when import my videos using the import files command and import videos previously captured with FCP 7 the right channel is there. Why is FCP X not recognizing stero videos when importing from camera? Anyone else having this problem?

I have had exactly the same problem. See my posts. I found this happens when creating a camera archive from mini dv. When importing direct into the event (not using an archive), or extracting the files from the archive in the finder and importing directly using import files, it works! Please report the bug to apple.

Left / Right Channel Audio mixing?

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