Dolby Digital is the common version containing up to six discrete channels of sound. The most elaborate mode in common use involves five channels for normal-range speakers (20 Hz - 20,000 Hz) (right, center, left, right surround, left surround) and one channel (20 Hz - 120 Hz allotted audio) for the subwoofer driven low-frequency effects. Mono and stereo modes are also supported. AC-3 supports audio sample-rates up to 48 kHz. Dolby Digital, formerly known as AC-3, is a digital audio coding technique that reduces the amount of data needed to produce high quality sound. Dolby Digital takes advantage of how the human ear processes sound. Dolby Digital provides five full-bandwidth channels, front left, front right, center, surround left, and surround right, for true surround sound quality. A low frequency effect (LFE) channel is included that provides the sound needed for special effects and action sequences in movies. The LFE channel is one-tenth of the bandwidth of the other channels and is sometimes erroneously called the subwoofer channel. This multichannel scheme is known as 5.1 channel.
Songs from Tamil films encoded to Dolby standard, 16bit, 48KHz, 448Kbps with surround sound channels, FL, FR, C, LFE, RL, RR. These files are with the extension of .ac3 and occupies size of 16MB for 04Minutes plaback (approx.), For playback in PC we may use VLC Media Player. To enjoy with optimum the PC might be connected with 5.1 Home Theatre. Now in market HT are readilly available most compatible with latest PC (CPU audio connectors). For use with domestic players (DVD/BD), modern players are with interface to connect storage devices as well equiped with decoding of raw format files (.ac3)