Originally Posted by Viritrilbia
Update! I have a single SB connected to SB left. I've just tried changing the speaker setup so the 79 thinks there are two SBs, left and right. BINGO! The iControl and aural confirmation show 9.2 (well 9.1 actually as only one SW) with both FHs and the SB engaged. A great result. Except presumably now whatever is fed to SB right is being lost rather than mixed into the single SB. Anyone suggest how I resolve this? And is it a fault with the 79 or its manual re use of a single SB?
it's not a defect and there's no "resolution" per se. your setup is what it is.
with one back channel, you have a 6.1 surround back setup not a left-right back setup. so if you are using PLIIx/z, NeoX, right ch back is just lost because you have only 1 speaker. for true 6.1 playback, Dolby EX, THX Surround EX, DTS-ES Matrix and the older DTS Neo6 are the 6.1 formats and those will be the ones that will send a monophonic blended rear channel. all the rest assume you have 2 back channels, including THX Cinema, although a THX speaker configuration kind of makes 2 speakers into 1 by having them very close together.
I'm not sure if somehow the Pioneer detects only 1 SB and then somehow blends the 2 together since I've never had a single SB; it's possible, I guess.
in the real world, you really aren't going to miss much because of 1 back speaker, since rear channels are for the vast vast majority of the time are derived from the sides. only with a true 7.1 track will you "lose" right rear but candidly, the way the studios use 7.1, in my experience with 7.1 BD tracks, its practically monophonic anyway. In all my BD's with 7.1, I can't tell much separation if any at all and they tend to be used with special effect sound, like gunshots, flyby's, etc and are so quick and transient, that by the time you hear a sound going from a side to the rear, it's only a fleeting sound and then gone. only 7.1 music would be an issue and even that, very rare to find 7.1 music tracks
and those that exist tend to be classical or jazz and the rears and sides are mostly used for hall ambience.
most importantly, if you really want left-right rears, then buy the 2nd speaker
the Pioneer uses standard decoding, standard processing, no different than anyone else in the industry. all the decoder code is embedded in DSP chips from an OEM chip mfg and everyone is using same kinds of DSP processors, if not the same exact mfg & model number. it's all been standardized many years ago so Pioneer isn't doing anything weird. it's how Dolby & DTS implement surround processing.