Interesting read, thanks for providing a link to it. The article was written in April of 2018 and if the recording does in fact exist, I agree that it would be pretty solid evidence of collusion. The article goes on to state how if Kap can prove that collusion, he would have a very solid case. However, I have heard nothing about it other than the article that you provided. Granted, I don't care enough to be always on the lookout about information regarding the whole thing so maybe there is more out there and I just haven't stumbled across it. If that recording does exist and it does in fact have audio evidence of owners agreeing not to sign Kap, then I stand corrected and I apologize. But if it exists, I would think that since April there would have been quite the media firestorm about the recording.
Kinda like the "evidence" of Russia meddling in the 2016 Presidential Election.