weird S signal (MS)

[t_d]

was working on a song today that needed some low mid reduction on the middle... so i did some MS (via DDMF's LP10 in MS mode) and just to get my bearings, completely muted the M channel... only to find that the S channel had signal only in the RIGHT channel.

so strange... so the whole mix was built from a mono signal and "stereo" information on in the right ear.

anyone come across this before? it was very odd. don't know quite what to do to get it to balance better.

[miro]

yo taylor

have you tried another M/S eq to doublecheck?
what sound is it your talking about?


by the way: i'm friends with dietrich he mentioned you recently!

peez

[pmx]

do not know the exact working of the drms plug, but this sounds to me as very normal: if you encode to m/s, the left will be the mono signal and the right channel contains a SUM of the left and right side channel.

[TranscendingM]

Yeah, this should be a normal thing, as mentioned above if decoding is right. Depending on where its summed, the combination of the channels in this case gives you the full percieved stereo signal. If you mute one or the other, you will get the result of the actual M/S setup.

[bob katz]

Originally Posted by t_d

was working on a song today that needed some low mid reduction on the middle... so i did some MS (via DDMF's LP10 in MS mode) and just to get my bearings, completely muted the M channel... only to find that the S channel had signal only in the RIGHT channel.

Then you are not properly decoding. If your decoder is built right, then when you mute the M, the S signal should be a mono OUT OF PHASE signal coming out of both speakers. The S signal is NOT a dual channel signal so it cannot have just a "right channel".

BK

[t_d]

just weird because in the past every other time i've set up MS and muted the M, i get the "ghostly" sounding stereo signals in both ears.. never heard the "stereo" signal in only one ear before.

Originally Posted by TranscendingM

Yeah, this should be a normal thing, as mentioned above. Depending on where its summed, the combination of the channels in this case gives you the full percieved stereo signal. If you mute one or the other, you will get the result of the actual M/S setup.

[TranscendingM]

Originally Posted by t_d

just weird because in the past every other time i've set up MS and muted the M, i get the "ghostly" sounding stereo signals in both ears.. never heard the "stereo" signal in only one ear before.

That is strange then if this is something you used before without problems. All in all it does sound like a decoding problem but if its built into the plugin I don't see how it suddenly came about. ?

[Karl Jackson]

Originally Posted by t_d

was working on a song today that needed some low mid reduction on the middle... so i did some MS (via DDMF's LP10 in MS mode) and just to get my bearings, completely muted the M channel... only to find that the S channel had signal only in the RIGHT channel.

so strange... so the whole mix was built from a mono signal and "stereo" information on in the right ear.

anyone come across this before? it was very odd. don't know quite what to do to get it to balance better.

Yep - sounds like the decoding is broken. When you mute M you should have S in the left channel and -S in the right channel, since M+S=L and M-S=R.

kj

[TranscendingM]

Are you sure the source track(s) feeding it are not perhaps panned stereo tracks?

[t_d]

going to look into it again.. reload the project and check the plug...

seems too weird, as you said, mathematically impossible (at least by the definition of "S")

likely a technical fault on my end...!