In SD-SDI mode, as per SMPTE ST 272, up to 16 channels of audio is extracted from data stream 1 (Y Video In). In HD-SD mode, as per SMPTE ST 299-1, up to 16 channels of audio is extracted from data stream 1 and 2. In 3G, 6G and 12G SDI modes, as per SMPTE ST 299-1 and SMPTE ST 299-2, up to 32 channels of audio are extracted from data streams 1, 2, 3, and 4. Audio control packets are extracted from data stream 1 and 3 (Y Video In) and audio data packets are extracted from data stream 2 and 4 (CBCR Video In).