Originally Posted by rajapruk
The digital outputs (coax and toslink), do they have the same signal as the xlr outs, but in digital form? I.e affected by volume control, bass management etc?
Today, I have my Oppo connected to an digital eq and speaker crossover via xlr. Digital would be better. But I need the volume control in the Oppo.
Volume control has no effect on the Digital audio outputs (HDMI, Optical, or Coax) except that Volume 0 is implemented as Mute and Mute does also mute the Digital audio outputs.
Crossover, Down-mix and the Speaker Configuration settings also have no effect on the Digital audio outputs.
If you are using the Digital audio outputs, the expectation is that all such stuff will be handled in your AVR or DAC.
As for the content presented in digital form on the S/PDIF Digital audio outputs (Optical or Coax), the available formats are more limited than what you can get on HDMI audio or by letting the OPPO do the decode and conversion to Analog for presentation on the Analog outputs.
So for example, SACD content will not be available in any form on Optical or Coax due to licensing restrictions (basically because there is no Copy Protection available).
The newer lossless Bitstream formats for Blu-ray (TrueHD and DTS-HD MA) are also not available on Optical or Coax. However, every Blu-ray disc is required to include a "compatibility" audio track -- even if it doesn't show in the disc's menus -- and that's what gets used for Optical or Coax. For a TrueHD track, the compatibility track is usually a traditional, lossy DD track, up to 5.1 channels. For DTS-HD MA you get traditional, lossy DTS up to 5.1 channels.
Similarly, LPCM tracks above Stereo have to be handled differently since the S/PDIF outputs can only carry Stereo LPCM.