Before each session the engineer recording the artist must prepare by synchronization. This is done by lining in/out each instrument/device.
An audio engineer, also called audio technician, audio technologist, recording engineer, sound engineer, sound operator, or sound technician, is a specialist in a skilled trade that deals with the use of machinery and equipment for the recording, mixing and reproduction of sounds. The field draws on many artistic and vocational areas, including electronics, acoustics, psychoacoustics, and music. An audio technician is proficient with different types of recording media, such as analog tape, digital multitrack recorders and workstations, and computer knowledge. With the advent of the digital age, it is becoming more and more important for the audio technician to be versed in the understanding of software and hardware integration from synchronization to analog to digital transfers.
Studio engineer – an engineer working within a studio
Recording engineer – engineer who records sound.
Mixing engineer – a person who creates mixes of multi-track recordings.
Mastering engineer – typically the person who mixes the final stereo tracks that the mix engineer produces.
When using a console it is important to get all of the levels (output of sound) even to make algorithms (sound waves monitoring tempo, beat and cadence
There are different types of mixing consoles, which is a board of either two or eight main outputs.
Other settings include compression or equalization, both serve as tools engineers can use to make the music more accessible.
If you want to make a shallow or faded track sound more alive you may want to experiment with different methods, for instance “wall of sound” is a technique originated by Phil Spector
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Live sound engineer – a person dealing with live sound reinforcement. This usually includes planning and installation of speakers, cabling and equipment and mixing sound during the show. This may or may not include running the foldback sound. A live/sound reinforcement engineer hears musical material and tries to correlate that sonic experience with system performance.
Foldback or Monitor engineer – a person running foldback sound during a live event. The term “foldback” is outdated and refers to the practice of folding back audio signals from the FOH (Front of House) mixing console to the stage in order for musicians to hear themselves while performing. Monitor engineers usually have a separate audio system from the FOH engineer and manipulate audio signals independently from what the audience hears, in order to satisfy the requirements of each performer on stage. In-ear systems, digital and analog mixing consoles, and a variety of speaker enclosures are typically used by monitor engineers. In addition most monitor engineers must be familiar with wireless or RF (radio-frequency) equipment and must interface personally with the artist(s) during each performance.