Hi,
I came cross two similar receivers and don't know what the exact difference means to me. The obvious difference in fineprint of the productct is :
5760B 5760S
5.1 Channel Discrete Input Yes NO
7.1 Channel Discrete Input Yes NO
Can somebody tells me what is "discrete input"? I am a layman.

thanks a lot. In what kind of circumstances I need these two features? Is there any other big difference between 5760B and 5760S?
thank you very much.