The ADAT-only spec optional ADC for OctoPre offers just one output format; ADAT. With two ADAT ports provided, you can choose to run at 96kHz and have four channels on each port. Alternatively, running at 44.1 / 48 kHz allows each port to mirror the same eight channels. The converters are 24-bit and 128x over-sampled, handling sample rates of up to 96 kHz, but can dither down to 20 or 16 bit. All frequency settings and bit rates can be altered from the front fascia, with an ADC lock LED to show when word clock is synchronised. An external Wordclock input is also provided (BNC connector).