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O objetivo da presente pesquisa é, decifrando o significado do termo Clavier (-teclado?, em sentido genérico), na obra tecladística de J. S Bach - especialmente nos Prelúdios e Fugas que compõem Das Wohltemperierte Clavier, oder Praeludia und Fugen durch alle Tone und Semitonia - concentrar-se naqueles que apresentam maiores problemas de execução ao cravo e propor uma leitura dessas peças ao órgão de tubos, levando em conta a linguagem instrumental de cada instrumento. / The objective of the present study remains in the meaning of the word Clavier (-keyboard?, in a general sense) in Bach\'s keyboard works - especially the Preludes and Fuges of Das Wolhtemperierte Clavier, oder Praeludia und Fugen durch alle Tone und Semitonia - to focus in those pieces that presents more difficulties to perform on a harpsichord and suggest a pipe organ performance according to each instrumental language.

O objetivo da presente pesquisa é, decifrando o significado do termo Clavier (-teclado?, em sentido genérico), na obra tecladística de J. S Bach - especialmente nos Prelúdios e Fugas que compõem Das Wohltemperierte Clavier, oder Praeludia und Fugen durch alle Tone und Semitonia - concentrar-se naqueles que apresentam maiores problemas de execução ao cravo e propor uma leitura dessas peças ao órgão de tubos, levando em conta a linguagem instrumental de cada instrumento. / The objective of the present study remains in the meaning of the word Clavier (-keyboard?, in a general sense) in Bach\'s keyboard works - especially the Preludes and Fuges of Das Wolhtemperierte Clavier, oder Praeludia und Fugen durch alle Tone und Semitonia - to focus in those pieces that presents more difficulties to perform on a harpsichord and suggest a pipe organ performance according to each instrumental language.

This thesis comprises two manuscripts prepared for scholarly journals. Chapter 2 comprises an article entitled “Exploring Historic Changes in Musical Communication: Deconstructing Emotional Cues in Preludes by Bach and Chopin.”, which examines emotion perception in historic prelude sets by J.S. Bach and F. Chopin. This work connects psychological research on perceived musical emotion to musicological research describing changes in music structure. Using a technique called commonality analysis to deconstruct cues’ individual and joint roles in predicting participants’ perceived emotions, the chapter clarifies how music’s conveyed emotion can differ in compositions from different eras. Chapter 3 comprises an article entitled “Parsing Musical Patterns in Prelude Sets: Bridging Qualitative and Quantitative Epistemologies in Historical Music Research”. This chapter bridges gaps between qualitative and quantitative research on music history through an analytical approach engaging with both fields. Specifically, cluster analyses of Bach and Chopin’s preludes reveal notable differences in the composers’ expressive toolkits, consistent with work from historical and empirical music research. Through a novel analytical framework, the chapter illustrates a method for detecting groups of pieces demarcated by salient musical differences, assessing cues’ importance within these groups, and determining the most influential cue values for each group. Together, these articles provide new insight into the subtle sonic relationships influencing musical meaning and emotion perception. / Thesis / Master of Science (MSc) / Music’s capacity to express emotion has received considerable attention in psychological and musicological research. Whereas efforts from psychology clarify the musical cues for emotion through perceptual experiments, efforts from musicology track changes in compositional practice over time—finding changing relationships between music’s cues for emotion in historically diverse compositions. To date, the implications of these changing musical relationships for emotion perception remain unclear. This thesis analyzes musical scores and listeners’ emotion ratings to gain insight into music’s structural changes throughout history and their implications for perceived emotion. By applying statistical techniques to (i) detect musical patterns in prelude sets by J.S. Bach and F. Chopin and (ii) clarify how cue relationships influence emotion perception, this thesis sheds light on the relationship between music’s historic context and its emotional meaning.

The Well Trained Algorithm is a composition that challenges prevailing conceptions of the use of AI tools in music through the reconceptualising of JukeBox, a generative AI model for music, as an instrument in its own right. Here, I am coining the term ‘instrumentisation’ to describe a methodology for applying the qualities and associations of a musical instrument to a traditionally non-musical object. To showcase this conceptual approach, this model of thinking is applied to aid in the composition of the AI-generated musical piece, The Well Trained Algorithm. Through this process of ‘instrumentisation’, musical terms such as tuning and timbre are redefined to better relate to the specific affordances of an artificially intelligent system. The composition is informed, then, by an exploration of a system's instrumental possibilities, leading to a more effective and artistic use of the technology in the creative process. The seminal works of J. S. Bach and La Monte Young, The Well Tempered Clavier and The Well Tuned Piano, respectively, provide a historical, musical, and theoretical context for the piece as well as the datasets used to fine-tune the JukeBox model. With this thesis, I ask if, through a process of ‘instrumentisation’ AI technology can be successfully reconceptualised as a musical instrument as a means to promote artistic expression.

The problem with, which this thesis is concerned is that of analyzing and comparing the fugal writing and contrapuntal style of J. S. Bach in the fugue expositions of The Well-Tempered Clavier and that of Paul Hindemith in the fugue expositions of the Ludus Tonalis. This comparison is made on the basis of a comprehensive analysis of the fugal expositions both collections of fugues mentioned ( The Well-Tempered by Bach and the Ludus Tonalis by Hindemith). Chapter I includes a discussion of the careers and compositional techniques of Bach and Hindemith. An emphasis is placed on a comparison of Bach's fugal writing with that of his immediate predecessors (composers of the seventeenth and early eighteenth centuries who were writing in the fugal style) and on a comparison Of Hindemith's theory of tonality, as expressed in The Craft of Musical Composition, with that of the traditional harmonic concept of Bach's day. Chapter II deals with the evolution of the fugal concept. In this chapter, imitative forms of composition which gradually evolved toward the fugue are traced from their very early beginnings through the sixteenth, seventeenth, eighteenth, nineteenth, and twentieth centuries. Emphasis is placed on the fugal form that Bach used and on Hindemith's neo-Baroque approach to fugal writing in the twentieth century. In Chapters III and IV, analyses are made of the expositions in the forty-eight fugues of Bach's Well-Tempered Clavier and Hindemith's Ludus Tonalis .There is a discussion of the number of voices, order of entries", order of statements of the theme, key relationships, and redundant entries. Also discussed In these chapters are the beginning and ending notes of the Subject, a change in tonality of the subject range and length of the subjects. There is, further, a discussion of the real and tonal answers and the reasons for the use of a tonal answer, recurring countersubject, invertible counterpoint, interludes, length of the exposition, and the cadences at the end of the fugue expositions. in Chapter V the fugal writing of Bach, as demonstrated in the fugue expositions of The Well-Tempered Clavier, and that of Hindemith, as demonstrated in the fugue expositions of the Ludus Tonalis, are compared. This comparison of these two styles of fugal writing shows the two composers' techniques and procedures to be very much alike except in Hindemith's expanded concept of tonality. Although Bach's set of fugues has set a standard for this type of writing, Hindemith has shown that this old form is still capable of being used with originality when adapted to twentieth-century practices.

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The thesis "J. S. Bach and His Piano Pieces for Music Art Schools" is focused on interpretation of the piano music of Johann Sebastian Bach. For the right understanding of the composer's musical narratives, it is necessary to acquire the basic knowledge and principles of the music theory in the Baroque era and to become familiar with the environment in which this extraordinary composer had been professionally developing and composing. This musician is presented here as the founder of a modern fingering whose musical language brought a change into musical thinking and he became inspiration and a role model for composers of the next centuries. This thesis highlights the importance of appropriately selected musical materials in piano teaching and it prefers the performance to be as authentic as possible. The main purpose of this paper is to update the knowledge of methodology and to find a comprehensive guide to a correct understanding of musical language of this genius that would help the music teachers introduce to pupils the beauty and timelessness of Bach's musical work and that would motivate them to other musical discoveries and make them desire to be further educated in music.