Does the EA-1 have an audio in? I can't remember, i haven't had one sinse they came out. If so, run the TX thru it to get some good "analogue" filtering on it. Or run it thru an external filter box. I have an Alesis Philtre. Running the TX thru a filter will keep the sharp, bright edge the FM synths have, but let you have some filter fun if you want. The TX is a great machine!