A system and computer-implemented method for generating music content includes a music notation data store having a collection of notation data files and an audio data store having a collection of audio data files, each data file in the notation and audio data stores including associated music characteristic metadata. One or more computer processor is arranged to receive user music preference inputs from a user interface and to search the notation and audio data stores to identify a plurality of data files corresponding to one or more user preference input. The processor randomly selects at least one notation file and at least one audio file from the identified notation and audio files and generates a music instance file by combining the selected notation and audio files for playback to the user.