The basis of significance of qualitative non-verbal communication researches is composed of alternative communication experience acquired in a result of all methods of self-expression employed by a child. Personal interrelations between a pedagogue and child create preconditions for changes in communicativeness of the child. On this basis we call the development of handicapped children by the musical expression the musical communication (MC). We distinguished three phenomena different in their dynamics in the structural composition of musical inter-personal relations, i.e., interaction,interrelations and communication. Natural musical expression of the children with CP is analysed in parameters of interrelations among self-expression, initiativety and musical dialogue. Conceptualisation of the emotional aspect of a musical event or situation reflects the complexity of the interrelations. In the structural composition of the communication process understanding is a process that adequately reflects the essence, meaning and relations of empirical and theoretical generalisations. Understanding is expressed in own, qualitatively new intonations (own words) or expression of a motion that needs former experience.