"I've got to agree with this. Anyone who has listened to something that also included signal that was 90 degrees out of phase knows that the result if anything but inaudible." This third channel should be audible in stereo, the problem is that when decoding something that should be audible for 2 channels and not for the third channel, it might become audible for the third channel too. OTOH, regarding to the kind of signal +/- 90° could sound very artificial. So I suspect that somebody might mix with focus on the surround decoding and do some strange things to the mix. "A matrix recovering the missing channels (with lots of crosstalk from the others, but things are done in a way as to make this acceptable)" While this should be true, grotesque experiments to avoid crosstalk might cause bad mixes. There are a lot of strange ideas in general, how to use what ever surround sound. I never understood and I still don't understand what a Brauner/SPL Atmos should be good for. Seemingly nobody is interested in this thingy: http://www.ebay.de/itm/Brauner-SPL-Atmos-5-1-Surround-Microphone-System-/200603807139 Who cares, working for Brauner was a job, but at this time he lost friends, others and me. Stuff like this is made to get money, money, money, in this case fortunately less people were that stupid and bought this nonsense. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user