Music and Time Annotation << Back Some aspects of mastering a piece of music by trained instrumentalists N.F. Semenova The article identifies a range of problems associated with the preparation of students of instrumentalists. Attention is drawn to a number of negative aspects that are manifested in the modern performing practice of children and subsequent generations of instrumental musicians studying: superficial perception of musical text, inexpressive performance, increasing number of fake sounds, tempo-rhythmic, metrhythmic negligence, technical illiteracy, lack of intonational culture, weak sound control, the lack of a holistic presentation of the musical form, the patterned performance of the performance, etc. The significance of orchestral-ensemble performance in solving technical and artistic-creative tasks of learning instrumentalists is revealed. The analytical spectrum includes: the dialectical interrelation of the mental and motor spheres, the auditory-motor determinant, the role of consciousness in the management of performing actions-movements of instrumentalists. The necessity and significance of intonation culture, articulation, phrasing, and expressive game as a whole are emphasized. The article traces the solution of actual problems of musical and instrumental art in line with the development of a musical work at the levels: technical-tactical, operational-technological, artistic-creative and psychological-pedagogical. Keywords: musical performance, musical and instrumental art, teacher-musician, studying instrumentalist, musical text, musical work. Contacts: E-mail: semenova_nf@mail.ru Pp. 29-32.