How can that be? If both analog rear and digital rear use KX_OUT (0x8) and KX_OUT(0x9), then if you mute one (in microcode), then both would be muted. In any case, we did look at epilog's registers to check for such things, and did not see any difference with DOO On/Off. As for the other testing we did, we really did not reach any conclusion, as we could not figure it out. I did not see any problems with kxlt, and I kind of thought that it was a kX bug (I figure the DOO switch should take care of everything at the hardware level, and as such, all a plugin should have to do is toggle that switch (plus the fact that it happens with epilog under some configurations). We could not figure out what register is used to mute analog rear, and as such, we could not track down the cause of the problem (or verify anything). In any case, I do not think that kxlt has anything to do with it (but of course I cannot be sure).