gnunet-conversation-test(1) on Linux
The text 29daa0a3c9f0, as Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
check your speaker and microphone settings
Flags it lists
-
--config -
--help -
--loglevel -
--version -
-L -
-c -
-h -
-v