Apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; audio equalizer apparatus; equipment for the recording and/or reproduction of electroacoustic or acoustic signals; microphones; headphones; loudspeakers; studio monitor loudspeakers; microphone pre-amplifiers; downloadable software for use in audio interfaces for the recording, editing, mixing, and mastering of digital audio files; computer hardware for the recording, storage, reproduction and processing of acoustic signals; computer hardware for processing audio signals; audio mixers; digital mixing desks; digital audio recorders; digital sound processors; software for the recording, storage, reproduction and processing of acoustic signals; audio interface software; downloadable software for use as a digital audio workstation; replacement parts of the aforesaid goods