I'm not sure I follow. I have a coax digital cable connecting my DV-656a to my Pioneer Elite VSX-24TX A/V receiver. When I play DD 2.0 or Pro-Logic DVDs, my receiver's "speaker config" lights light up accordingly
I am sure you are correct WRT to the digital connection, my question pertains to what signals are present on the 6CH analog outs when you have a DVD that is 2.0 or 2.1 that is meant for PL decoding.
The 45A, simply sends the 2.0 signals straight out the L&R pair. It has no means to decode then into L/C/R plus surround. FWIW, it does not say that it will do PL in the specs. I incorrectly assumed that if a device would do DD, it would also do PL. Not the case, at least with the 45A. It does DD, DTS, DVD-A, and SACD, but does NOT do PL.
I have an old-school receiver that is PL only and has no digital inputs. It does, however, have a 6CH analog input, which is how the 45A connects. I intended for the 45A to handle ALL decoding duties in my rig, but since it will not do PL, I need to connect the analog stereo pair to an input of the receiver, and invoke PL on that.
Since the 6CH inputs on the receiver are straight through with no processing (as they are on many receivers), I can not invoke PL in cases where the software is 2.0 or 2.1, etc.
This is a total non-issue for most users that connect digitally to their receiver or pre/pro. Those users will do all DD, DTS, and PL decoding there, and only use the 563 for DVD-A and SACD.
As an aside, if you have a DD 1.0 disc (my daughter has some Scooby Doo that are 1.0), you will get nothing out the stereo pair, since it just mimics the L&R channels. In that case, you DO need to use the 6CH outs, in order to hear what is on the disc (in that case, only the Center channel).
For some aditional weirdness, the Scooby Doo Original Mysteries DVD has the audio for the menus in 2.0, but the individual episodes are 1.0. When I was using the stero pair, I was hearing the menu music, but as soon as the shows started, I lost audio and had to switch to the 6CH in.