User Manual Sony STR-AV210 AM/FM Stereo Receiver

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.

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.