Focusrite Scarlett OctoPre 8-Channel Mic Preamp With ADATDescription The Scarlett OctoPre is the ideal 8 channel expansion for any Scarlett or other digital interface with ADAT inputs. ADAT is a simple and easy way of increasing the number of simultaneous recording channels available in your studio. With eight channels of Focusrite's 2nd generation Scarlett preamps and precision A D conversion at sample rates up to 192kHz, Scarlett OctoPre is the ideal way of increasing the number of inputs in your studio.