PS Audio Direct Stream

Can anyone tell me what you can connect to the 2 i2s inputs on the DirectStream DAC? I am under the impression that it is related to HDMI. If this is correct, is it similar to the NAD M51's HDMI input. I was thinking I could use it to connect the HDMI output from a 2 channel TV Cable Box (amongst other inputs I would use).

Ozzy, how are you feeding the DS? With your BDP-2?

Yyzsantabarbara, I thought that the HDMI inputs could be used that way too. But, they can only connect other PS Units with I2S outputs. If you don't have any of those, those inputs are useless.

Joecasey. I'm using XLR (AES) digital. I would like to try USB but I'm not sure about its compatibility with each other.
I read on the PS Instructions about downloading USB drivers. Not sure how to do this with the Bryston BDP-2 in place of a computer.

Ozzy, not so on that.

I use I2S from my Empirical Audio Off Ramp 5 into the PWD II I2S input.

Ozzy, My guess USB drivers are already installed on BDP-2 but I would stick with XLR.

BTW, have you compared BDP-2/DS to your Cary 306?