The ADC-AES card is a reference quality audio A/D converter that will convert four analogue audio channels with the highest possible quality and produce two AES3 stereo digital audio signals. Each converter has dual AES outputs which are available on the balanced backplane. Only one output per converter is available on the un-balanced backplane. The card may be used with, or without an external AES clock signal and may be run at nominal or double sampling rates. The ADC-AES has internal clocks for 48 kHz and 44.1 kHz based rates but can be used with any external sampling rate 29 kHz – 100 kHz.