A:Answer Hi Mtber,
Make sure to be connected the optical cable properly 5.1CH (5.1 Surround Sound): Up to a 5.1 channel surround sound signal is extracted
from your source device and played through the OPTICAL OUT jack. This mode is
best for connecting to a sound bar, receiver, or other playback device that is
compatible with surround sound signals.
Insignia Support
Alvin
www.insigniaproducts.com/support