 Bruce Springsteen's 1982 album "Nebraska" was made this way, with Springsteen choosing the album's earlier demo versions over the later studio recordings.The familiar tape cassette was designed to accommodate four channels of audio – in a commercially recorded cassette these four tracks would normally constitute the stereo channels (each consisting of two tracks) for both 'sides' of the cassette – in a four-track cassette recorder all four tracks of a cassette are utilized together, often with the tape running at twice the normal speed (3¾ instead of 1⅞ inches per second) for increased fidelity.A separate signal can be recorded on to each of four tracks.