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M-S Decoders?

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Submitted by anonymous on

Anybody know of a reasonably priced outboard M-S decoder box with line level(+4)XLR ins/outs?



AEA sells one that has some extra tweaks(width control, etc.) but it runs at about $600 list.



I've seen some partial circuit designs posted. They seem fairly simple, but they've been either unbalanced or incomplete.



Any thoughts?

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RecorderMan

any three channels with polarity reverse on one and the ability to pan will decode M/S (analog or digital)...when spend money on a dedicates matrix?



Formula:



M channel: Pan center.

S channel number one: Pan left; polarity normal

S channle mult( a copy or mult of the S channel): Pan right; polarity reversed.



So, M is up the middle and gives you your mono center/image. The Left S+ and right S- channels give you your stereo/side information.

Play with the balance, though the combined S+/S- channels can start around -3db relative to the M channel.



[ December 02, 2003, 12:28 PM: Message edited by: RecorderMan ]

Tue, 11/18/2003 - 19:43 Permalink
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anonymous

The only advantage I can see of a dedicated M/S decoder would be in a live-to-two situation, where you need to get the correct stereo imaging onto tape, rather than decoding it later during mixdown.



I've only used M/S a coupla times, but in both instances I decoded after the fact using three channels on the desk and hard panning/flipping polarity, as described above.

Sun, 11/30/2003 - 18:38 Permalink