Audio post production is the general term for all stages of production happening between the actual recording in a studio and the completion of a master recording. It involves, sound design, sound editing, audio mixing, and the addition of effects. wikipedia.org

Melodyne is an industry standard audio pitch modification tool similar to Auto-Tune. It is developed by Celemony Software GmbH, a German musical software company that specializes in digital audio pitch correction software. wikipedia.org

An arrangement of a musical composition is a reworking of a piece of music so that it can be played by a different instrument or combination of instruments from the original. wikipedia.org

Singing is the act of producing musical sounds with the voice, and augments regular speech by the use of both tonality and rhythm. wikipedia.org

Translation is the communication of the meaning of a source-language text by means of an equivalent target-language text. wikipedia.org

Writing is a medium of communication that represents language through the inscription of signs and symbols. wikipedia.org