LF/MF chat mode?

One of the drawbacks of WSPR is that it is really a weak signal beaconing mode not really suited to chatting. Southgate News has details of a mode created in New Zealand that is aimed at LF/MF chats. It is said to be almost as good as WSPR in terms of its weak signal capability. As yet, I have not tried it.

See http://southgatearc.org/news/2018/march/lf-mf-mode-with-synchronous-decoder.htm#.Wru5JUxFzIU