esdcompat is a compatiblity script that takes the
same arguments as the ESD sound daemon , but uses them to start a the PulseAudio sound server with the appropriate parameters. It is
required to make PulseAudio a drop-in replacement for esd, i.e. it
can be used to make
start up PulseAudio instead of esd.
It is recommended to make esd a symbolic link to this script.