Taperssection.com
Gear / Technical Help => Ask The Tapers => Topic started by: Swampy on October 29, 2004, 09:21:30 PM
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Okay, so what I understand about MS is, the mid mic is a card and the sides are fig 8s. Since the lobes of the 8s are out of phase you can get a stereo image by using the two lobes. So would it work to record with one channel as the card, the other as the figure eight, dumping them into cep, making a copy of the figure 8 and reversing the phase on it. or do you have to have a special pre or decoder or somthing? THANKS!
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you got it right, most folks use a waves pluggin for the post matrixing of the m/s channels. some pre's allow for a mix on the fly, but that is somewhat limiting. if you use wavelab, the pluggin is a snap, but i didn't recognize that other program name.
good luck!
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Okay, so what I understand about MS is, the mid mic is a card and the sides are fig 8s. Since the lobes of the 8s are out of phase you can get a stereo image by using the two lobes. So would it work to record with one channel as the card, the other as the figure eight, dumping them into cep, making a copy of the figure 8 and reversing the phase on it. or do you have to have a special pre or decoder or somthing? THANKS!
Ideal world using matched (level) mics:
The M picks up left and right side equally: M= S_left + S_right.
The 8 picks up S_left but S_right is inverted: 8 = S_left - S_right
Adding the two (M+8) yields 2 x S_left.
(M-8) yields 2 x S_right.
Real world using unmatched mics:
The output from the M is A x (S_left + S_right)
Output from 8 is B x (S_left - S_right)
Levels on 8 must be amplified by factor (A/B) before you form sum and difference.
M/S processing is not more involved than this.
Edited for readability.
Jon
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Interesting...so does this mean that MS is more of a "stereo effect" than a true stereo image...?