Very good news, John G8BPQ has ported Soundmodem from UZ7HO to Linux.
Mail from John G8BPQ.
Andy UZ7HO has allowed me to port his Soundmodem to C so that it can be run run Linux systems. See
https://www.cantab.net/users/john.wiseman/Documents/QtSoundModem.html
This is pre-Beta software. It has been tested by several people but is likely to still have bugs.
73,
John G8BPQ