The work is devoted to a comprehensive study of button accordion means of articulation and pronunciation in the context of academic traditions of musical art. Until now, the button accordion theory of articulation has not developed an unambiguous interpretation of the terms "articulation" and "pronunciation" as the most important components of musical performance speech. The author offers his vision of the problem of articulation in the button accordion. The publication is intended for teachers and students of educational institutions of arts and culture, all interested in the problems of the art of playing keyboard and pneumatic instruments.