Topic: M/S Accident

[airbladder]

Last night at Keller I accidently ran a psp3 on the ms setting rather than LR.  I was wondering why one channel was so hot compared to the other.  What does the ms setting do and what happed to my recording as a result.  Giving it a quick listen sounds like the left Mic. is 200 feet from the pa or was pointed towards the back of the room.
Thanks
Ed     

[F.O.Bean]

basically, if you cant/dont decode it, youre screwed, actually, im pretty sure youre screwed

just try decoding it in sf or cep or something, that may help, but you werent truely running a figure 8 and it sounds like the card/hyper wasnt pointed straight forward, so yeah, youre screwed unless you actually had a fig 8 and a card and were trying to do it

live and learn bro, i bet that wont happen again

[dklein]

In ms recording, I think it goes like this:

ch. 1 = centre pointing card = (L+R)
ch. 2 = sideways figure of eight = (L-R)

Instead you ran cards pointed left and right.  The ms process left you with:

ch.1 = (ch1 + ch2) = (L+R) which is additive and will be a hot signal
ch.2 = (ch1  - ch2) = (L- R) which is subtractive, sounds like crap and is very low level

You want left & right info back.   I think that if you process thru a software ms decoder you will get this. 

ms output left  = (L+R)+(L-R) = 2L  this is your left channel*
ms output right = (L+R)-(L-R) = 2R  this is your right channel

The trick is when you mixed the original there was a certain balance encoded into the output (*it wasn't the pure channel as indicated above because they were mixed at different levels).  You'll have to play with the width to try and find the right balancing spot.  I think you can locate that spot by centering the sound.  When you're off balance with the 'reverse ms decoding' one channel should get louder than the other (I think the left goes down as you add side channel).

All theoretical of course but try it out. 

 If you can't get it to sound ok then try reversing which channel you call mid and side.

[JAH]

basically, if you cant/dont decode it, youre screwed, actually, im pretty sure youre screwed

just try decoding it in sf or cep or something, that may help, but you werent truely running a figure 8 and it sounds like the card/hyper wasnt pointed straight forward, so yeah, youre screwed unless you actually had a fig 8 and a card and were trying to do it

live and learn bro, i bet that wont happen again

nawwww you are not F'ed..the PSP-3 Decodes too so run the analog back into it and adj by ear.

like Bean said....live and learn bro, i bet that wont happen again


peace jah