Philips HDRW 720/00-02 User Manual page 21

Two analogue audio sockets AUDIO OUT L/R (audio signal output
left/right) are located at the back of the DVD recorder.
These can be used to connect the following:
At the back of the DVD recorder there are two digital audio output
sockets OPTICAL OUT for an optical cable and COAX OUT for a
coaxial cable (Cinch cable).
These can be used to connect the following:
a
b