AI 22 : Podcast, Record, Live Stream, This Portable Audio Interface Covers it All – USB sound card for Mac or PC delivers 48 kHz audio resolution. Record guitar, vocals or line input signals with two combo XLR / Line / Instrument Inputs with… PURPOSE OF AUDIO INTERFACE Ease of use and high quality recording – one of the main advantages of an audio interface over on-board sound cards is that, because of the greater physical size and easier accessibility, a wider range of input types can be built into the unit. So, for instance, ¼” jack guitar inputs can be included, as can full XLR microphone inputs, meaning that the device can be capable of connecting to wide range of professional recording equipment. In addition to this, audio interfaces generally feature higher quality audio quality than standard on-board sound cards. Many also have MIDI if you want to connect a keyboard controller too.