9 Downloadable computer software and downloadable mobile computer software applications for use in accessing, reviewing organizing and updating digital information and electronic documentation, for creating and reviewing electronic musical set lists and electronic instructions used in the field of music with musical instruments and musical equipment; Downloadable computer software for programming, changing, updating, operating and controlling metronomes; Downloadable electronic publications in the nature of articles in the field of music, musical instruments, and musical equipment; Downloadable video recordings featuring music; Downloadable electronic sheet music; Downloadable musical sound recordings; Downloadable audio and video recordings featuring music and artistic performances; Digital music, digital audio works in the field of music, and digital audiovisual works in the field of music, all of the foregoing downloadable from the Internet; Downloadable computer software and downloadable mobile computer software applications in the fields of music, musical instruments and equipment for use in playing, producing, learning, authoring and creating music, as well as tuning, timing, maintaining and optimizing musical equipment