This module has been designed for AES audio centric installations and allows 4 x AES digital audio pairs to be routed to the Audio Meter and Loudness instruments. This module can also be used to output 4 x AES digital audio pairs from the selected Analyser/Generator module within the Rx chassis. Compatible with the Rx2000, Rx1000 and Rx500 instruments and extends the existing audio functionality of these instruments. The 4 x AES digital audio pairs use 75ohm BNC connectors that accept AES sample rates from 32kHz to 192kHz with 20 or 24 bit depth. The module sample rate converts these inputs to provide 48kHz AES audio for use by any installed module within the Rx chassis. The 75ohm BNC connections are auto-sensing and can be used for both input and output of AES signals. The AES audio can be accessed by any of the audio instruments of the HDMI monitor output, the AES channels can be mapped to specific stereo pairs, 5.1 and 7.1 groups for measurement and monitoring using audio meters and loudness logging.