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Re: X-Y -> M-S

Subject: Re: X-Y -> M-S
From: "Rob Danielson" danielson_rob
Date: Sun Mar 11, 2007 3:57 pm ((PDT))
At 7:37 PM +0000 3/11/07, John Lundsten wrote:
>From: Rob Danielson
>Hi Andy,
>Yes, several of the MS plugs including +matrix have the math ability
>to reverse the process. I believe we determined in an earlier
>discussion on this list, however, that one cannot reclaim the exact
>same mid and side signals/tracks by this means. So, save your field
>M-S original files; they are unique.
>
>Not true, The process is 100% accurate, 100% reversible  (if your doing th=
is
>digitally that is - kinda close with analog electronics) My demo "party
>piece" to demonstrate this to my students is to take 2 signals; some music
>in mono and something nasty sounding like White noise or Timecode. Then Su=
m
>& difference these (IE MS encode them) then decode back to 2 very separate=
 &
>clean signals.  If you listen to either just the M or the S  you get loads
>of noise and barely audible music I tend to crank up the noise to emphasis=
e
>how effective this all works.

Hi John--
This could be good news for some recordists. What M-S encode/decode
plug do you use? I'll try it again with yours.

Do you think that alterations like adjusting the mid level to taste
become a factor? There were some mda plugs that seemed to be a
simpler patch, but the ones' folks are now creating/using are more
involved. I did the test with the plugs I have at the default
settings. I prefer a virtual board, separate EQ on both sources, gain
adjustments and then save the mix session with the result should I
need to re-do it.  But, most people use M-S plugs, so we looked into
it. Rob D.

--
Rob Danielson
Peck School of the Arts
University of Wisconsin-Milwaukee
http://www.uwm.edu/~type/audio-art-tech-gallery/





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