MS Decoder

I was doing some MS recordings with a harddisk recorder, Tascam HD-P2, and now I need to decode them. The MS Decoder found in Logic's Helper Plug-in does decode and produce a proper stereo signal, however the rich quality of the original undecoded signal is lost after decoding process. The signal seems to be squeezed, the stereo spread is to narrow and high frequencies are somehow not there anymore. Does anyone have an idea why this happens?, thanks.

Power Book G4, Mac OS X (10.4.9)

Posted on May 24, 2007 10:39 AM

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6 replies

May 24, 2007 1:57 PM in response to zmix

Thanks for answering,
The recorder was set on 48khz sampling rate and 16 bitrate XLR stereo, the microphone was rent, but I think there was nothing wrong with the mic unless it really matters where you plug it. I did not know, if it mattered, where you plug the two microphones. Is there a rule, that says the center mic on the left channel of the recorder and the eight-shaped microphone to the right or something? I did not know, I just decided to plug them the same way everytime I used the MS.

My Tascam recorder gives out wav-files. I imported these wav-files directly into Logic Pro 7.2.3 and used the standard MS Decoder from the direction mixer plug-in, I did not change the base or the direction of the plug-in, for left and right seemed to be properly encoded, but a lot of the upper frequencies of the sound seem to be lost that way and also the stereo spread seems to be quite narrow compared to the original as far as one can tell - it's just as if the room suddenly becomes smaller. The recordings I made, were taken in a Tunnel.

Have a goog day. Christoph

May 24, 2007 2:10 PM in response to ccramer

Try widening the Base control, in normal circumstances when doing this sort of decoding manually you would set the centre mic, centrally.
Then take the figure 8 mic, copy it onto a new channel and pan the two channels hard left and right. You then flip the phase of one of them. Check it and make sure you are flipping the desired mic.

Try it the long way round and see if it gives the same results. You should be able to adjust the width of the resulting sound by turning up the figure 8 channels.

If it sounds better un decoded, then just use it un decoded, it doesnt matter if it sounds good to you then it will to others.

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MS Decoder

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