"You can listen through a receiver (i.e Home Theater) instead of the TV speaker.
1. Select Receiver and set to On.
2. Press the EXIT button to exit.
NN If your receiver supports audio only, it may not appear in the device list.
NN The receiver will work when you have properly connected the optical in
jack of the receiver to the DIGITAL AUDIO OUT (OPTICAL) jack of the TV.
NN When the receiver (i.e Home Theater) is set to On, you can hear sound
output from the TV's Optical jack. When the TV is displaying a DTV (air)
signal, the TV will send out 5.1 channel sound to the receiver. When the
source is a digital component such as a DVD and it is connected to the
TV via HDMI, you will hear only 2 channel sound from the receiver."
Yes there is audio output on this model.