The DAP-1781 is a high quality 8-channel (4 AES) digital audio processor which performs signal processing and synchronizing, as well as Dolby E and Dolby Digital (AC-3) encoding and decoding with metadata support. It can be used as a standalone audio processor for discrete audio signals or it can be combined with a wide range of SD and HD video processor modules. When working with a video processor, the DAP-1781 can be used for dynamic processing, up/downmixing and embedding of discreet audio channels into a video signal. It can also process Dolby E and Dolby Digital (AC-3) signals for encoding or decoding (ABUS). Two audio processing cards can be combined together to process a total of 16 discreet audio channels. When combining any two cards together, all audio channels are synchronous, phased and delay matched to ensure proper alignment.