L-R to M-S

Discussion in 'Microphones (live or studio)' started by protone, Dec 21, 2005.

  1. protone

    protone Guest

    This is probably very stupid thing to ask and I should be able to figure this out by myself... but for some reason (lack of brains) I can't!

    I know how to convert MS-signal to L+R, but how to do it other way around? How can I get M and S signal out of regular LR-stereo signal?
  2. zacharym

    zacharym Guest


    that's a strange question, just due to the fact that those are miccing techniques, and once you'll have m/s setup with a fig 8 and a cardiod mic, I mean assuming you have selectible polar patterns you can switch over to x/y or blumlein with reasonable ease, or just use a regular spaced pair. I'm getting the impression that you've already tracked though, and are in the mixing stage, in which case, you should probably just stick with what you have, because it's probably going to be pretty phasy otherwise.

    so basicly, it's a mic choice thing.
  3. Kev

    Kev Well-Known Member

    Nov 13, 2001
    some mastering desks use sum and difference to play with stereo width and special compression techniques
    L-R and R-L stuff
    part of which used in TV, stereo/mono transmission stuff
  4. IIRs

    IIRs Well-Known Member

    Oct 23, 2005
    Mid = Left + Right
    Side = Left - Right

    Easiest way to get the mid channel is a mono mix of both channels with -6dB gain. To get the side channel invert the polarity of the right channel, mix the result with the left, and drop the gain by 6dB to match the mid.
  5. protone

    protone Guest

    Thanks IIRs, that's just what I wanted to know.

    Zacharym, I understand my question might have sounded strange without any details... sorry.

    I asked this because I'd like to tweak M and S channels of my mixes separately. I have been demoing MD3 for powercore and I found the MS mode very usefull. So I was just wondering if I could do the same with what I own.
  6. IIRs

    IIRs Well-Known Member

    Oct 23, 2005
    MS processing Rocks 8) and its usually easy to set up once you understand the principle.. I like to do it inside Tracktion racks :D
  7. Falken

    Falken Active Member

    May 20, 2005
    is it common to eq and compress this way?
  8. IIRs

    IIRs Well-Known Member

    Oct 23, 2005
    I'm not sure about "common".. but if I'm manipulating a stereo signal I usually find it more useful to deal with M/S than L/R.
  9. Cucco

    Cucco Distinguished Member

    Mar 8, 2004
    Tacoma, WA
    I use it all the time during mastering if I want to do something to vox only. It's also good for spreading stereo imaging or solidifying the center image.

  10. Falken

    Falken Active Member

    May 20, 2005
    muwahaha....thanks guys
  11. iznogood

    iznogood Member

    Feb 9, 2004
    M/S to L/R is the same process as L/R to M/S

    i use waves M/S matrix
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