Some Focusrite interfaces feature ADAT inputs and outputs. ADAT is a digital format carried using optical (sometimes referred to as “TOSLink”) cables.
The number of channels transferred between two devices over a single ADAT cable depends on the sample rate being used, please see the table below:
|ADAT Channel Count
|44.1kHz and 48kHz
|88kHz and 96kHz
|176.4kHz and 192kHz
An audio signal transmitted via ADAT can only travel in one direction down a single cable. If you want to send audio signals in two directions using ADAT, you will need two cables and both devices need ADAT In and Out ports.