Usb audio interface design external interface usb max sample rate 192 khz bitrate 24 bit connections headphone 2x instrument analogue outputs 2 x 635mm stereo headphone outputs 2 x xlr digital inputs 1 x adat 1 x spdif optical digital outputs 1 x adat 1 x spdif optical guitar input jack midi connectors 1 x midi in 1 x midi out phantom power