In text linguistics coherence is seen as one of the key factors in communication and textual interpretation. Text linguistics, as an inter-disciplinary field of study concerning the textuality of texts in conjunction with coherence, can probably be of great importance in current musicology, especially as the problem concerning musical meaning, is still an ongoing debate. The design of a musical model of coherence relations is a new field of study and can not be connected to present day language models, therefore a new model should be invented. It should be kept in mind that adaptations in text linguistics can be of great influence in musicology today and on music in its relation to language. Musical interlocution forms the basis for musical coherence relations as method of musical communication. Musical communication has its origin in the top/cohesive surface of the musical text and disseminates to the lower/coherensive surface of the musical text. Although there is an interaction between musical cohesion and coherence, coherence relations are more concentrated on the lower level. Musical illocution and musical blended perlocution function within the coherensive musical and word texts. The listener plays a big role in this process, because musical coherence is the platform for musical interpretation. As listeners design a word text around the music text, musical blended perlocution through association results. The addition of associative meaning to the musical text has the result that the linguistic perlocution and the musical perlocution intermix with one another. One must keep in mind that perlocution differs in language and music. It will be indicated that musical coherence relations have a dual character. It will be argued here that the principles of musical textuality, adjusted from those text linguistically practised by De Beaugrande&Dressler (1981) and Carstens (1997, 2000, 2009), as well as the three musical functions, adapted from Austin's (1962) determination in language, figure strongly in J.S. Bach's Schübler Chorales. / Thesis (DMus)--University of Pretoria, 2009. / Music / unrestricted