B
Boray
New member
Hi!
You have said a couple of times that stereo is one common component L+R and one difference signal L-R. Do you in the same time mean that L stands for left channel and R for right channel, or what do you mean? Because if you mean that, then this definition can't be true.
L-R will give the difference between the channels, yes, but so will R-L. But I can kind of agree to that.
L+R however is not the description of the common component of both channels. It's both channels together = the mono presentation of the stereo sound (or the full stereo sound when presented in stereo). I agree that there is a common component to a "stereo sound", but not that it can be described as L+R. If you for example have a hihat only sounding in L, then L+R would also have this hihat even if it's not common to both channels. I would describe the common component as L /\ R, where /\ is the boolean "AND". The difference signal could likewise be described with the boolean XOR. So the total stereo signal would then be (L /\ R) /\ (L XOR R) = L \/ R where \/ is the boolean AND that in some notations is "+"... So the total stereo sound presented in stereo should be L + R. ...or as said the mono sum if it's presented in mono.
I posted this question here as you both see me as a newbie and as you see this L+R, L-R definition as newbie stuff.
/Anders
You have said a couple of times that stereo is one common component L+R and one difference signal L-R. Do you in the same time mean that L stands for left channel and R for right channel, or what do you mean? Because if you mean that, then this definition can't be true.
L-R will give the difference between the channels, yes, but so will R-L. But I can kind of agree to that.
L+R however is not the description of the common component of both channels. It's both channels together = the mono presentation of the stereo sound (or the full stereo sound when presented in stereo). I agree that there is a common component to a "stereo sound", but not that it can be described as L+R. If you for example have a hihat only sounding in L, then L+R would also have this hihat even if it's not common to both channels. I would describe the common component as L /\ R, where /\ is the boolean "AND". The difference signal could likewise be described with the boolean XOR. So the total stereo signal would then be (L /\ R) /\ (L XOR R) = L \/ R where \/ is the boolean AND that in some notations is "+"... So the total stereo sound presented in stereo should be L + R. ...or as said the mono sum if it's presented in mono.
I posted this question here as you both see me as a newbie and as you see this L+R, L-R definition as newbie stuff.
/Anders
