Mid Side Encoding and Decoding in pure Audiomulch

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antonhornquist
antonhornquist's picture
Joined: December 13, 2009

Hi,

Is Mid Side Encoding and Decoding possible in Mulch w/o resorting to VST or Audio Unit plugins? Any help on this would be appreciated.

/Anton

Babaluma
Babaluma's picture
Joined: June 24, 2009

Yep, you can do it with the mixers and the inverter, classic M/S on a mixer goes like this:

"The basic method is to clone or mult the Left and Right channels so you have four channels in total.

Sum the first pair to Mono by panning both channels to the centre. The 'Mid' information, which is basically your dry stuff that is common to both side, gets a 6dB boost from the summing. The 'Side' information, which is basically your stereo wet stuff (like reverb) doesn't get any boost.

With the second pair of left & right, do the same but invert the polarity of one side. This cancels out the dry stuff that is common to both sides, leaving just the wet stuff (in mono).

Now, you recombine the mix of these two buses (Mid and Side) back into a stereo Left/Right mix. This is done by creating one side by summing Mid and Side and panning to one side. The other side is created by subtacting Side from Mid and panning to the other side. Subtraction is achieved by Summing with one side channel polarity inverted.

If you are new to this - this sounds strange and convoluted. But the mathematics are solid - you really can turn Left & Right into Mid and Side, and then back again to Left & Right with zero loss of informaton.

The reason to do this is to allow you to change the mix between Mid and Side - Wet & Dry - Front to back."

 

From an informative post on GS, should be pretty easy to relaise in Mulch, but it's far, far easier just to use the freeware Voxengo MSED plugin.

antonhornquist
antonhornquist's picture
Joined: December 13, 2009

Thanks :). I'll try it out. I use MSED but I prefer a pure AM version since I often work on different platgorms and having synced plugin folder is a bit of a hassle.