When using the remote interface to load and play an
mp3, then sending STOP followed by a LOAD, mpg321
doesn't send the @S message as mpg123 does. Note that
the @S _is_ being send on the first LOAD, but not on
following LOADs, if it's the same file playing.
This difference from mpg123 breaks the MP3::Daemon
module for perl, and the Audio::Play::MPG123 module too.