Mono to Stereo in Garageband.. really Confusing

Discussion in 'Mac Apps and Mac App Store' started by ouimetnick, Feb 24, 2012.

  1. ouimetnick macrumors 68020


    Aug 28, 2008
    Beverly, Massachusetts
    I have Garageband 11, and I have an old mono recording of John Denver. Audio plays in the left channel only.. It was recorded that way. Anyways I want to get the audio to be fed from both the left and right channels. The audio was from a video. I imported the video into Garageband, and deleted the video, and I'm left with the audio like I want to be.

    Its technically not Stereo, but two channel Mono. How do I do this?

    Also if I remember right, I used to be able to select part of the audio from the bottom part (double click on the track to bring this advance editor up) and I could select sections of the track and cut them out. Now when I try to select part of it, this FlexTime editing stuff comes up. How do I just select a part of the track to delete instead of using Split every time?

  2. Fishrrman macrumors G5


    Feb 20, 2009
    Garageband has a "left/right" control for its tracks, does it not?

    Can just tinkering with that produce the desired results?

    If not, try this:
    - Create a second track in Garageband (empty for the moment)
    - Duplicate the audio of the first track, then move it to the second track
    - Now, use the "L/R" control in each track, manipulate it until one track "balances out" against the other, left-to-right-wise.
    - Then, export the "mono mixed" track, either as mp3 or aiff.

    If this doesn't work, you might try downloading the free "Audacity" app. It may have a tool that can do the conversion you need (which I think would be from "left" to "stereo").
  3. ouimetnick thread starter macrumors 68020


    Aug 28, 2008
    Beverly, Massachusetts
    The recording was made with JUST the left channel. The balance control wouldn't change anything.
  4. mchalebk macrumors 6502a

    Feb 4, 2008
    I’m not sure how to do this in Garageband. If there’s a way to turn a stereo track into two mono tracks, I missed it. However, Audacity (which is freeware) can do this. You can split the stereo track into two mono tracks, then delete the empty one.

    I’m not at my Mac (which is home), so can’t remember the exact details, but you can still double-click on a track to split it. I think you have to click on the lower half of the waveform to avoid the FlexTime stuff.
  5. ouimetnick thread starter macrumors 68020


    Aug 28, 2008
    Beverly, Massachusetts
    I just want to convert mono into stereo. Not the other way.
  6. ghellquist macrumors regular

    Aug 21, 2011
    Stockholm Sweden
    Split first

    Garageband was purposedly simplified in order to make it useable for normal people. My favourite programs all handle this without any problems at all, but they did rake me a lotof time to learn.

    And making a stereo signal into mono using only left channel and panning that into middle is not quite the standard stuff.

    My best guess is to use another program to divide the stereo file onto one left and right. Then import omly the left file and pan that on the middle.

    There might be other ways, but alas, Garageband is not my forte.

  7. mchalebk macrumors 6502a

    Feb 4, 2008
    You misunderstand. You do not have a mono track, you have a stereo track where only one channel has useful information. The first thing you need to do is split the stereo track and get rid of the useless channel.

    As to whether you want mono or stereo with two identical tracks is splitting hairs. The end result will be the same.
  8. PlusMinus macrumors newbie

    Jun 4, 2014
  9. krs303 macrumors newbie

    Sep 5, 2017
    I did that this way: I recored guitar (in my case right channel). Copied track. Selected both with Shift. Now go to EDIT>Join Regions and choose Mono. That made one stereo track using one as left and one as right.
  10. jonwaltermoceyhanton macrumors newbie

    Jun 22, 2018
    this worked great and did exactly what i wanted it to do!!
    i took the two of the same mono .mp4 tracks in garageband
    and was able to create a mono mix down using the "join regions" feature
    now the audio plays back equally from both left and right channel
    thank you for the suggestion!!
  11. a2rael macrumors newbie


    Dec 13, 2011
    Centralia, PA
    Yes!!! I needed this. Thank you!
  12. aliensporebomb macrumors 68000


    Jun 19, 2005
    Minneapolis, MN, USA, Urth
    You can get a faux stereo effect by moving the new track just a few milliseconds to the end on the timeline. Try it!

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