Sound recording apparatus; sound transmitting apparatus; sound reproduction apparatus; sound processing apparatus; sound mixing apparatus; electric and electronic effects units for musical instruments; digital sound processors; analogue sound modifiers; audio interfaces; audio receivers; audio equalizers; data processing apparatus; transponders; monitoring apparatus and instruments, namely, electric monitoring devices for monitoring sounds not for medical purposes; sound amplifiers; amplifiers for musical instruments; audio mixers; audio mixing consoles; microphones; acoustic couplers; electronic apparatus for manipulating, editing, and the playback of audio signals; audio processing equipment, namely, compressors, expanders, limiters, gates, routers, equalizers, filters, mixers and summing mixers, all for audio signals; audio mixers, namely, analog mixing consoles and digital mixing consoles, and parts therefor; microphone pre-amplifiers; digital signal processors for processing digital audio signals; digital interfaces for computers for audio recording; signal converters; transceivers; software for capturing, creating, processing, recording, transmission, reproduction or amplification of sound; computer network interface devices for transmitting and recording audio; software for audio editing, recording and production; computer software for digital audio workstations, namely, computer software for manipulating, processing, editing, recording, transmitting and the playback of audio signals; computer software for the conversion of audio projects between digital audio workstation standards