Bernhard, the gentleman that I bought my "pre-owned" AS Optimism V-2 from was doing just that. Unfortunately, the EMM version wasn't available yet and the standard version which I bought, didn't work in his EMM units, and we now know why. So therefore, the experiment was never completed. I think you should email Tommy Dzuryk at AS and just ask him straight out. Tell him you don't have $3000 to spend, but you would like to buy one EMM cable for the audio signal, for now, and would that be OK?
I'm sure many other people would like an answer to that one :~))