Audio engineering encompasses many things that involve sound systems, in the case of the engineering company we refer to mixing and mastering. Mixing is a process performed after the end of production, or even during production, it depends and varies from artist to artist from case to case. The mixing consists of performing "polishing" of instruments, cleaning and clarity of the audio, where each instrument of the music is given a specific treatment, so that all instruments can sound well defined, thus obtaining an extreme sound quality, so that listeners can play the songs on any sound system, be it headphones or speakers, or even for artists to play their music in party clubs.