9 Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, namely, electric current switches, electrical controllers, electrical transformers, semi-conductors; apparatus for recording, transmission, amplification, or reproduction of sound or images, namely, power transformers for amplification; amplifiers; blank magnetic data carriers for recording video and sound; blank CD-ROMs for sound or video recording; blank DVDs for video recording; pre-recorded magnetic data carriers, namely, CDs, DVDs featuring music, sound samples and music samples; computer software for use in sound database management, system administration, for generating and processing sound signals, for converting analog and digital sound signals; data processing equipment and computers, namely, data processors and computers; all the aforesaid goods only for use in connection with musical performances, music productions, as components and accessories for musical instruments