Downloadable computer software and mobile applications for creating and manipulating digital audio information for use in music and audio media applications; downloadable software in the nature of audio plugins for use in processing sound recordings, for use in audio signal processing, and for use in playback of audio effects; downloadable computer software for analysing and reporting on differences between versions of some audio visual media; downloadable computer software for re-arrangement of audio or visual composition data in the fields of music, film and television post-production; downloadable computer software incorporating digital signal processing algorithms and graphical user interfaces in the field of audio signal manipulation