User Manual Sony TA-E731X Pre Amp

The two most common connections used to hear TV sound
from the A/V receiver or home theater system speakers are:

Option 1: HDMI® connection using the ARC feature
Option 2: Connection using an HDMI cable, Coaxial Digital,
Optical Digital, or Audio cable
Which option you use will depend on the connection ports on
your products. If your TV and audio system both support the
ARC feature, we recommend using Option 1 to connect your
products, otherwise use Option 2.

The Audio Return Channel (ARC) connects your TV and audio
system with a single High Speed HDMI® cable and eliminates
the need for an additional composite audio or optical cable.
Connecting an ARC-compatible audio system to an ARC-
compatible TV allows the following:
Send audio from the TV to the audio system.
View and listen to movies and other content sent from the audio
system and viewed on the TV.

Pulse-Code Modulation (PCM) and the Dolby Digital®
technology refer to different types of digital audio recordings.
PCM is the conventional method for converting analog audio
into digital audio. The PCM audio recorded on DVD is a two-
channel digital, stereo audio track.

The Dolby Digital® technology, which was originally called AC3,
was developed specifically for multi-channel applications,
including film sound and digital surround sound in the home.
Dolby Digital® technology uses a 5.1 or six channel format. The
5 channels include the Stereo left and right front channels,
Stereo left and right surround channels, and the center channel.
There is also, a Low Frequency Effects (LFE) channel for the
subwoofer, which is counted as the 0.1 channel since it
functions only when a deep base effect is needed.