A record producer is an individual working within the music industry, whose job is to oversee and manage the recording (i.e. "production") of an artist's music.

Voice acting is the art of providing voices for animated characters (including those in feature films, television programs, animated short films, and video games) and radio and audio dramas and comedy, as well as doing voice-overs in radio and television commercials, audio dramas, dubbed foreign

The guitar is a string instrument of the chordophone family constructed from wood and strung with either nylon or steel strings. wikipedia.org

Lyrics (in singular form lyric) are a set of words that make up a song, usually consisting of verses and choruses. The writer of lyrics is a lyricist or lyrist. wikipedia.org

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