Usb audio interface series m audio m track design external interface usb max sample rate 96 khz bitrate 24 bit connections 2x headphone analogue outputs 2 x 635mm stereo headphone outputs 8 x balanced 635mm trs jack 2 x unbalanced 635mm jack guitar input jack midi connectors 4 x midi in 4 x midi out phantom power signal noise ratio 112 db software included avid pro tools express software