mid-side summing, can it be done by software?

Discussion in 'Tracking / Mixing / Editing' started by Barkingdogstudios, Jan 23, 2005.

  1. Barkingdogstudios

    Barkingdogstudios Active Member

    I have seen on a couple of pre-amps the ability to do m-s summing when recording stereo using the m/s technique.

    If I record two tracks (one mid, one side) using this microphone positioning technique into SONAR, do I need a special m-s summing plug-in? Or is there some simple way to make use of these two tracks to do the same summing that would have been done by the aforementioned preamps?

    I've been wanting to try out m-s stereo recording but have never seen an explanation on how to bring the two components together other than by hardware.

    Thanks in advance for your help.
  2. David French

    David French Well-Known Member

    You should be able to manually matrix the tracks by duplicating the 'S' track, polarity inverting the duplicate, pan the original 'S track hard left, and pan the duplicate 'S' track hard right. Link the two 'S' channels volume faders together so that they are always at the same relative volume.
  3. zemlin

    zemlin Well-Known Member

    I've done it plenty of times. With Vegas, ASIO, and realtime monitoring, I can record mid-side with no special hardware - record two tracks from the same input - invert one of them, and mix to taste.

    Works fine for me.
  4. Barkingdogstudios

    Barkingdogstudios Active Member

    Thanks Gentlemen,

    So presumably, I could just record the 'm' track from one input of my preamp, reverse the phase for the 's' track going into another input of the preamp and then just clone the 's' track afterwards. This would acheive the same thing right?

    Which applications is the m-s technique best used for? Stereo acoustic guitar? Choral ensembles? What have you used it for? Are there applications where it doesn't work well?

    Thanks again for your help.
  5. zemlin

    zemlin Well-Known Member

    I would not want to record MS if I could not hear what I was getting when setting up. You COULD take the mix to MS later, but you'd be recording .... well not blind, but with one eye closed. I'd look for a way to monitor with the MS properly mixed when you're setting up and recording so you don't end up kicking yourself later.

    Not sure I follow what you're proposing for phase on the S mic - you need one track normal panned hard to one side, the other track reversed phase panned hard to the opposite side - and mix those with the Mid mic.
  6. Barkingdogstudios

    Barkingdogstudios Active Member

    Duh on me. What was I thinking???

    Ok, I get it now.

    Thanks again.
  7. geckormf

    geckormf Guest


    I've just seen this link by accident - it looks like it'll sum/unsum for you. Give it a try?

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