Dolby Digital is multi-channel digital audio, using lossy AC-3 coding technology from PCM source with a sample rate of 48 kHz at up to 24 bits. It is the most commonly used audio for DVD-Video as it is low bit rate and installed on all DVD players. Purists would argue that it is not suitable for music DVD use, so the choice is often left to the consumer by adding PCM, DD and DTS to music titles. The bit rate ranges from 64 kbps to 448 kbps, with 384 or 448 being the normal rate for 5.1 channels and 192 being the typical rate for stereo (with or without surround encoding).

The channel combinations are (front/surround): 1/0, 1+1/0 (dual mono), 2/0, 3/0, 2/1, 3/1, 2/2, and 3/2. The LFE (low frequency effects/sub) channel is optional with all 8 combinations. At 24-7 we have encoded and QC'd thousands of hours of Dolby Digital audio and are well equipped when it comes to encoding audio for your projects. Please contact client services for more information.