RobinKidderminster said:
Just wondering why a bluray player though an AV receiver is (in general) less suited to music/CD playback.
The theory is that multipurpose drives able to play CDs don't do so as well as a dedicated CD drive. That being said, many modern CD players do use CD-ROM or DVD-ROM drives as their transport, with dedicated CD-only drives mainly being reserved for more expensive players.
As I said, that's the theory, not a personal opinion; anecdotally, I use a Cambridge Audio 'universal' player through an Onkyo receiver to play SACDs – my CDs these days are ripped and streamed – and have no complaints about its performance.
RobinKidderminster said:
Are there particular 'weak' components? (Which one might bypass??)
Well, all the video processing circuitry in both BD players and AV receivers is a potential source of interference, so it would make use of any 'Pure Direct' or 'Pure Audio'-type switching available on each device, which usually turns off video processing and/or routes the signal down the shortest possible path through the component.
RobinKidderminster said:
And - just wondering (again - like ya do) if you use HDMI or optical/coax digital output from a BD player, presumeably you don't use the players DAC but the AV receiver DAC.
Correct.
RobinKidderminster said:
And then - is it better (for music) to use analogue output from the BD?
Kinda depends how good the digital-to-analogue conversion and analogue output stage in the player is. IME, some more expensive players tend to do better in this respect than budget machines, but again this is based on limited experience.