Any 2 to 1 (or 1 to 2) adapter placed in a line to split a feed.
"I received my album and the CDs that they were transferrred to yesterday. WOW! I can't get over how great they are. I have been playing the CDs and comparing them to my commercial Gilbert and Sullivan CDs. The CDs you produced are better than one analogue to digital CD, equal to the other, and comparable to the digitally recorded Cds. I get ..."