|Originally posted by hifialan|
Does this mean the converters have no relevance when listening to DVD-A or SACD through an analog direct input?
When you are listening to DVD-A or SACD through the analog direct input - you are using the DACS in your DVD/CD player.
The information on DVDs and CDs is digital - "1"s and "0"s. At some point, these have to be changed to analog signals to
be amplified to drive your speakers.
Your DVD player has DACs in it - so that it can output the analog signal that you are inputting to your receiver.
In all likelihood, your DVD/CD player also has a digital output, so that you can use it not as a DVD "player" but as
as DVD "transport". In this case, you would feed the digital
data from the DVD to your receiver using the digital output on the DVD player, thus bypassing the DACs in the player.
The receiver, would use its DACs to convert the signal to analog, for amplification for the speakers.
Some receivers have the capability to do digital "effects" - they can process the digital data to make it sound like you're
in a small club, or a big arena. This processing has to be done on the digital signal. If you feed an analog signal
to such a processor, it will use ADCs - analog to digital converters - to turn the signal back into digital. If you
have a digital source like a DVD player - and you use this capability, you don't want to use analog inputs. The
receiver is going to take the analog input and convert it back to digital - the receiver's ADCs will undo what the
player's DAC did, and then after processing the receiver will process the signal with it's own DACs.
If you are not using digital signal processing in the receiver, then the question is - which one has the better
DACs - the player or the receiver. If the player has better DACs - use the analog inputs.
However, if you have a medium quality DVD player, and a high-end receiver, then you should use a digital connection;
so that you will be using the DACs in the high-end receiver.