Even using the parameter -E or --esd, mpg123 will not connect to a remote
server.

Making

$ strace mpg123 file.mp3 --esd 10.10.10.10

you'll see this:

connect(3, {sin_family=AF_INET, sin_port=htons(16001),
sin_addr=inet_addr("0.0.0.0")}}, 16) = -1 ECONNREFUSED (Connection refused)

The 0.0.0.0 IP shows that mpg123 is not getting the correct IP address from
the command line, which is 10.10.10.10.

Another inconsistency:
Running mpg123 without parameters it says -E is used for equalization.
Running mpg123 --longhelp, it says -E and --esd is the same thing.
The same parameter (-E) has different meanings?

Thank you,
Avi