TOSLINK and RCA connectors accept two-channel digital audio signals in the S/PDIF format at any standard sample rate between 44.1kHz and 192kHz. The RCA input can also automatically accept digital audio in the AES3 (AES/EBU) format using the XLR-RCA adapter supplied.
The Inputs tab of the Atlas Control Panel app contains the control for selecting the RCA or TOSLINK connector for S/PDIF input, and also indicators to show that the S/PDIF input is unlocked (i.e. no S/PDIF carrier is recognized) or asynchronous to the unit's sample clock. The unlock indicator is also shown beneath the digital meter on the unit's front panel (providing that the unit's meters are in Input mode).
The TOSLINK connector can also accept 8-channel digital input in ADAT format (at 44.1kHz or 48kHz sample rates) or 4-channel input in ADAT SMUX format (at 88.2kHz or 96kHz sample rates). The Inputs tab also contains ULOK and ASNC indicators for the ADAT/SMUX input function.
Note that ADAT input and output is only possible when operating Atlas in one of its specific ADAT-capable modes. This is to reduce overhead on the host PC or Mac when ADAT input and output is not required. For more information see the Unit Settings tab of the Atlas Control Panel app.
It is possible to configure a sample-rate converter in the S/PDIF input, as described in the following section.