New to Forum, watched many Youtube vids.

[Mid-Fi]

For example, you can use your PS3 to play SACDs and dsd files direct via the HDMI of a $599 Denon AVR-X3400H. You can't do that with the A-S801.

I don't know what SACDs or dsd files are.

 

[PENG]

I don't know what SACDs or dsd files are.

SACD is Super Audio CD
DSD is Direct Stream Digital

If you want to learn about DSD and USB DAC, Google university is a good place to start, below are links to some that are easy to read, not too technical.

DSD:
https://en.wikipedia.org/wiki/Direct_Stream_Digital
https://www.nativedsd.com/information/about-dsd
https://www.cambridgeaudio.com/en/blog/what-dsd

USB DAC:
https://www.pcmag.com/encyclopedia/term/60626/usb-dac
https://www.cambridgeaudio.com/en/blog/what-is-a-USB-DAC