Originally Posted by alexandru27
I ran YPAO but was not attentive and I think it calibrated for 7.1. nevertheless let it do its job and finally it said OK (I presumed with the 7.1 calibration the additional surround channels will put their sounding in the side surround speakers too). After that, when listening both on a SACD and on TV, the display on the AVR showed the configuration of 5 speakers - so I reckoned the receivered 'saw'' that there are only 5 speakers.
My previous (5.1) system was a home cinema Pioneer DCS-585.
As first impressions after listening to both a SACD with Pink Floyd, and then some channels on the TV: I am somewhat not impressed with the sound, at least as compared with the previous Pioneer home cinema (supposedly a much lower quality device): apart from the fact that there is almost no bass, the trebble sounds a bit muffled, or rather, there is a certain coloration to the upper and even the mid frequencies. This results in a not natural sound. Almost all the voices have a certain tonality which doesnt sound right - at least not for what I was expecting to hear from yamaha 673.
The overall sound of Pioneer DCS-585 was...cleaner, more natural (and of course with more bass, although that was to be expected, given the lack of a sub in this newer system).
YPAO seems to check all speaker outputs. It will have found only 5 speakers and calibrated accordingly. If you go into the manual setup, I think you'll see the unconnected speakers greyed out
As for your dissatisfaction with the sound, you can go in and adjust EQ settings after YPAO is done. On my 773 YPAO gives 3 pre-set EQ options (Flat, Normal, and Natural, or something like that). You can mess around until you get the sound you're looking for.
Also, check the sound mode you are running in. The receiver has a lot to choose from. It might be in Sci-Fi, which is not the best for music.
Another thing to consider is the psychological/physiological aspect of the way we hear sound. You are likely accustomed to your old Pioneer, and consider its sound as "natural", while any other sound seems unnatural. People's ears and perceptions grow into new speakers and sound systems.
Further yet, if your old system had a sub and you now have no sub, it will be very difficult to accurately compare. Turning a sub on and off makes quite a difference. Speaking of which, have you changed all of your speakers? If so, you aren't really set up to do a straight comparison between the Pioneer and the Yamaha. I would say that speakers have far more impact on the the sound than the receiver (if you are running straight with no sound processing programs anyway).