Any 2 to 1 (or 1 to 2) adapter placed in a line to split a feed.
"Thanks for taking the trouble to do such a beautiful job on so small an item. All my LP remastering will now be headed your way (piecemeal). Although I was able to hear some tape hiss, the music sounded much clearer and more natural -- closer to the original recording. Thanks again for a great job. Brockett sings again!"