Apparatus for recording, transmission or reproduction of sound or images, namely, memory card recorders; memory card portable recorders; IC recorders, namely, digital audio/voice recorders; audio multi-track recorders; digital audio recorders; digital video recorders; sound reproduction apparatus; portable MP3 players; audio amplifiers; audio mixers; loudspeakers; microphones; headphones; audio signal processors; electrical connectors for telecommunication apparatus; audio signal interfaces f...