serenity_english_5.1_1536.eac3 clip of an E-AC-3 track from HD-DVD 5.1 channel, 48kHz, 1536 kbps This sample uses the E-AC-3 feature of allowing a lower number of blocks per frame in order to increase the bitrate. Normal AC-3 requires 6 blocks per frame, but this sample only has 1.