Media playable with selectable performers

A method of customizing a media composition comprising:

• (a) providing a media file comprising selectable tracks, each track including a recording of a performer performing a part of a particular composition including a plurality of parts, wherein the selectable tracks include multiple performances of at least one of the plurality of parts by different performers;
• (b) providing a user an option to select one or more of the tracks such that tracks selected by the user are user selected tracks;
• (c) including a primary track of the particular composition in the media file;
• (d) preparing a customized media file including the user selected tracks and the primary track;
• and
• (e) enabling the user to repeat steps (a)-(d) with alternative user selected tracks if desired to prepare an alternative customized media file until the customized media file or the alternative customized media file is finalized, wherein the primary track forms part of the customized media file and each of the alternative customized media files,
• wherein the primary track and the selectable tracks of the particular composition are rendered by being synchronized with one another by start, end and length and mixed to industry standard pre-master state, and wherein the primary track and the selectable tracks of the particular composition are subsequently mastered,
• wherein the media file comprises a music file, wherein the primary track is a performance of at least one part in the particular composition by a particular artist, and wherein the primary track comprises five primary tracks including a first primary track including performances of two parts in the particular composition mixed into a single track, a second primary track including a version of the first primary track inverted to play backwards, a third primary track including a version of the first primary track with a front half inverted and a back half played forward, a fourth primary track including a version of the first primary track with the front half played forward and the second half inverted to play backwards, and a fifth primary track being devised based on a software interpretation of the first, second, third and fourth primary tracks and the user selected tracks after synchronization.