DD to SPDIF with Samsung LE40B750

[rikardo1979]

page 12 in user manual for your TV

Quote:8 DIGITAL AUDIO OUT (OPTICAL) Connects to a Digital Audio component such as a Home theatre receiver. When a Digital Audio System is connected to the DIGITAL AUDIO OUT (OPTICAL) jack: Decrease the volume of the TV and adjust the volume level with the system’s volume control. 5.1CH audio is possible when the TV is connected to an external device supporting 5.1CH. When the receiver (home theatre) 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 Home theatre receiver. When the source is a digital component such as a DVD / Blu-ray player / Cable Box / Satellite receiver (Set-Top Box) and is connected to the TV via HDMI, only 2 channel sound will be heard from the Home Theatre receiver. If you want to hear 5.1 channel audio, connect the digital audio out jack on DVD / Blu-ray player / Cable Box / Satellite receiver (Set-Top Box) directly to an Amplifier or Home Theatre, not the TV.

This explains why