~$ lsof | egrep 'artsd|esd'

lsof: WARNING: can't stat() ext3 file system /dev/.static/dev
      Output information may be incomplete.
knotify    4728 stompthebozo  mem       REG       22,1   32568    596356 /usr/lib/libesd.so.0.2.36
mplayer    7954 stompthebozo  mem       REG       22,1   32568    596356 /usr/lib/libesd.so.0.2.36
mplayer    7955 stompthebozo  mem       REG       22,1   32568    596356 /usr/lib/libesd.so.0.2.36
mplayer    7957 stompthebozo  mem       REG       22,1   32568    596356 /usr/lib/libesd.so.0.2.36