ADX-1901: 3G/HD/SD 8 Channel Analog Audio De-embedder Datasheet (GVB-1-0496C-EN-DS) File size: 628.3 KB, posted Sep 11 2017 The ADX-1901 from Grass Valley, a Belden Brand, is an advanced, high-quality 24-bit 48 kHz analog audio de-embedder designed to extract eight analog audio signals from a 3G/HD/SD video signal. The ADX-1901 can process the eight audio de-embedded channels with functions including level, channel shuffling and mixing.