D
Darth_vader
Guest
The voices of each otherare derived from the difference of the voices of all.
[size=8pt]Or if you'd prefer to get technical, it's the sum of the whole (left + right) phase-seperated by the difference (left - right) with proper filtering, then shifted another 90deg. This extra shift gives an unacceptibly wide image to most listeners when heard stereophonically on certain equipment (e.g. on earphones) but it's a necessary evil as it cancels out inter-channel crosstalk more effectively. So it's especially practical for transmitting several monophonic programmes where the individual sub-channels can easily be selected with a simple A-B toggle or crossbar switch.
(Well, I guess you didn't get that issue of "Popular Multiplexing"...)
[size=8pt]Or if you'd prefer to get technical, it's the sum of the whole (left + right) phase-seperated by the difference (left - right) with proper filtering, then shifted another 90deg. This extra shift gives an unacceptibly wide image to most listeners when heard stereophonically on certain equipment (e.g. on earphones) but it's a necessary evil as it cancels out inter-channel crosstalk more effectively. So it's especially practical for transmitting several monophonic programmes where the individual sub-channels can easily be selected with a simple A-B toggle or crossbar switch.
(Well, I guess you didn't get that issue of "Popular Multiplexing"...)