Automatický přepis hudby a odhad vícero znějících tónu jsou stále výzvou v oblasti dolování informací z hudby. Moderní systémy jsou založeny na různých technikách strojového učení pro dosažení co nejpřesnějšího přepisu hudby. Některé z nich jsou také omezeny na konkrétní hudební nástroj nebo hudební žánr, aby se snížila rozmanitost analyzovaného zvuku. V této práci je navrženo, vyhodnoceno a porovnáváno několik systémů pro konverzi nahrávek elektrické kytary  do MIDI souború, založených na různých technikách strojového učení a technikách spektrální analýzy.

In recent years, a large part of the erhu's repertoire has been arranged for performance on the violin and vice versa. Given the difficulties involved in transcribing the music of plucked or woodwind instruments for the violin, the erhu has been the most popular choice for transcribing Chinese music for the violin. However, the erhu and violin are radically dissimilar instruments based on different principles. Pipa music is an essential part of traditional Chinese music from as early as 202 BCE, and the instrument's repertoire represents a large portion of East Asian music aesthetics, and this context should be considered to successfully transcribe pipa music for violin. This dissertation talks briefly about Chinese music history and its categories and also focuses on the history and development of the pipa as well as its repertoire categories to provide context for the following musical examples. I use existing transcription examples from different categories of pipa music as an avenue to discuss how to transcribe pipa music for the violin. Even though the violin has some limitations for use as a plucked instrument, the instrument can still make use of several different kinds of techniques in order to play the music in a way that can represent certain features of the pipa while retaining the violin's characteristics.

Automatic Music Transcriptions systems such as ScoreCloud aims to convert audio signals to sheet music. The information contained in sheet music can be divided into increasingly descriptive layers, where most research on Automatic Music Transcription is restricted on note-level transcription and disregard expressive markings such as legato slurs. In case of violin playing, legato can be determined from the articulated, "hard" onsets that occur on the first note of a legato slur. We detect hard onsets in violin recordings by three different methods — two based on signal processing and one on Convolutional Neural Networks. ScoreCloud notes are then labeled as articulated or slurred, depending on the distance to the closest hard onset. Finally, we construct legato slurs between articulated notes, and count the number of notes where the detected slur label matches ground-truth. Our best-performing method correctly labels notes in 82.9% of the cases, when averaging on the test set recordings. The designed system serves as a proof-of-concept for including expressive notation within Automatic Music Transcription. Vibrato was seen to have a major negative impact on the performance, while the method is less affected by varying sound quality and polyphony. Our system could be further improved by using phase input, data augmentation, or high-dimensional articulation representations. / System för automatisk musiktranskription såsom ScoreCloud syftar till att konvertera ljudsignaler till notskrift. Informationen i en notbild kan delas in i flera lager med en ökande nivå av beskrivning, där huvuddelen av forskningen har begränsats till transkription av noter och har bortsett från uttrycksmarkeringar såsom legatobågar. I fallet med violin kan legato bestämmas från de artikulerade, ’hårda’ ansatser som uppkommer vid den första noten i en legatobåge. Vi detekterar här hårda ansatser i inspelningar av violin genom tre olika metoder — två baserade på signalbehandling och en baserat på faltningsnätverk. Noter från ScoreCloud märks sedan som artikulerade eller bundna, beroende på det närmaste avståndet till en hård ansats. Slutligen konstrueras legatobågar mellan artikulerade noter, och vi räknar antalet noter där den predicerade märkningen stämmer med den sanna. Vår bäst presterande metod gör en korrekt märkning i 82.9% i genomsnitt taget över testinspelningarna. Vårt system validerar idén att innefatta uttrycksmarkeringar i automatisk musiktranskription. Vibrato observerades påverka resultatet mycket negativt, medan metoden är mindre påverkad av varierande ljudkvalitet och polyfoni. Vårt system kan förbättras ytterligare genom användandet av fas i indata, datautvidgning och högdimensionella representationer av artikulation.

The progressive metal style "djent" emerged in the mid-to-late 2000s with bands that modeled their use of extended range instruments and complex rhythmic cycles after that of Swedish metal band Meshuggah. The addition of a new vocabulary of melody and harmony by bands such as Periphery, Tesseract, and Animals as Leaders has come to define djent in a new way and provided fruitful ground for voice-leading and metrical analysis. In this dissertation, I approach analysis in two steps. The first step is the production of detailed transcriptions of four djent songs. The process of transcription has allowed for the development of Transcription Preference Rules, modeled after Lerdahl and Jackendoff's preference rule approach in their Generative Theory of Tonal Music. The Transcription Preference Rules account for the selection of key signatures, time signatures, and other features of the scores that may affect analysis. Second, using these scores, I examine the connection between the textual topic of change and the voice-leading and metrical structures in Periphery's "Insomnia" and Tesseract's "Of Matter." I show how this topic is reflected by techniques such as change melodic direction, multidimensional metrical dissonance, and auxiliary cadential events. Finally, I apply voice-leading and metrical analysis to Animals as Leaders's "Tempting Time" and Mute the Saint's "Sound of Scars" in order to show what these analytical techniques reveal about instrumental djent pieces. I show how shifts in meter in "Tempting Time" can be represented cyclically. I conclude by showing how the interaction of metal and North Indian Classical techniques produces a unique representation of Mute the Saint's topic of longing and frustration in "Sound of Scars."

Este trabalho visa abordar conceitos estéticos, musicais e históricos (relacionados à época do Iluminismo) que envolvem as transcrições para violão \"Six Airs Choisis de l\'Opéra de Mozart: \"Il flauto magico, arrangés pour guitare\" Op. 19 do compositor e violonista espanhol Fernando Sor (1778-1839), publicadas entre os anos de 1823 a 1825, em Londres, e baseadas em árias de A flauta mágica k620 (1791) de Mozart. O processo de transcrição empreendido por Fernando Sor exigiu, inclusive por necessidades históricas (aproximadamente 35 anos separam essas obras), uma mudança de concepção da escritura instrumental, pois, para Sor, tratava-se de verter a essência de um pensamento musical concebido no meio operático e apresentá-lo sob o conceito sonoro de um instrumento solo emergente, como foi o caso do violão no final do século XVIII e primeiras décadas do século XIX. Assim, do ponto de vista instrumental, elementos como textura, estilo de acompanhamento e conceito de condução de vozes, para citar apenas alguns aspectos, sofreram mudanças de concepção, resultando muitas vezes quase em uma nova composição e, até mesmo, outra percepção da forma musical, porque, acima de tudo, o elemento dramáticoliterário está ausente. / This paper aims at addressing the aesthetic, musical and historical concepts (related to the Enlightenment) that involve the guitar transcriptions \"Six Airs Choisis de l\'Opéra de Mozart: \"Il flauto magico, arrangés pour guitare\" Op. 19 by Spanish composer and guitarist Fernando Sor (1778-1839), published between the years 1823 to 1825, in London, and based in Mozart\'s Die Zauberflöte k620 (The Magic Flute). The transcription\'s process undertaken by Fernando Sor required, even for historical purposes (the compositions were created 35 years apart), a change in the concept of instrumental writing. For Sor, it was a question of translating the essence of the musical thought conceived in an operatic way and presenting it under a sonorous concept of an emerging, solo instrument as had been the case of the guitar in the late 18th century and in the first decades of the 19th century. From the instrumental perspective, therefore, elements such as texture, style of accompaniment and the voice leading concept, to name but a few, have undergone conceptual changes, often resulting almost in a new composition and even a different perception of the musical form since, above all, the elements of drama and literature are absent.

Este trabalho visa abordar conceitos estéticos, musicais e históricos (relacionados à época do Iluminismo) que envolvem as transcrições para violão \"Six Airs Choisis de l\'Opéra de Mozart: \"Il flauto magico, arrangés pour guitare\" Op. 19 do compositor e violonista espanhol Fernando Sor (1778-1839), publicadas entre os anos de 1823 a 1825, em Londres, e baseadas em árias de A flauta mágica k620 (1791) de Mozart. O processo de transcrição empreendido por Fernando Sor exigiu, inclusive por necessidades históricas (aproximadamente 35 anos separam essas obras), uma mudança de concepção da escritura instrumental, pois, para Sor, tratava-se de verter a essência de um pensamento musical concebido no meio operático e apresentá-lo sob o conceito sonoro de um instrumento solo emergente, como foi o caso do violão no final do século XVIII e primeiras décadas do século XIX. Assim, do ponto de vista instrumental, elementos como textura, estilo de acompanhamento e conceito de condução de vozes, para citar apenas alguns aspectos, sofreram mudanças de concepção, resultando muitas vezes quase em uma nova composição e, até mesmo, outra percepção da forma musical, porque, acima de tudo, o elemento dramáticoliterário está ausente. / This paper aims at addressing the aesthetic, musical and historical concepts (related to the Enlightenment) that involve the guitar transcriptions \"Six Airs Choisis de l\'Opéra de Mozart: \"Il flauto magico, arrangés pour guitare\" Op. 19 by Spanish composer and guitarist Fernando Sor (1778-1839), published between the years 1823 to 1825, in London, and based in Mozart\'s Die Zauberflöte k620 (The Magic Flute). The transcription\'s process undertaken by Fernando Sor required, even for historical purposes (the compositions were created 35 years apart), a change in the concept of instrumental writing. For Sor, it was a question of translating the essence of the musical thought conceived in an operatic way and presenting it under a sonorous concept of an emerging, solo instrument as had been the case of the guitar in the late 18th century and in the first decades of the 19th century. From the instrumental perspective, therefore, elements such as texture, style of accompaniment and the voice leading concept, to name but a few, have undergone conceptual changes, often resulting almost in a new composition and even a different perception of the musical form since, above all, the elements of drama and literature are absent.

Widely regarded as one of the most significant composers of the late nineteenth and early twentieth centuries, Carl Nielsen and his music have come to define the early twentieth-century musical traditions of Denmark. His original songs for voice and piano are often revered as popular folk tunes and contributed to his status as a national icon. My dissertation explores Nielsen's vocal repertoire through a multipart project that includes transcribing and editing eleven of Nielsen's early songs from Op. 4 (1891) and Op. 10 (1894), originally for voice and piano, for flute and piano. I discuss the reception history and context of Nielsen's Songs, the important role of transcription in flute literature, and provide full score transcription of the original works for flute and piano. Many vocal works have been transcribed for flute from the original vocal score, providing variety in programming and attracting diverse audiences to performances. Transcription offers scholars a new view into a work, by determining what elements of the piece are integral to maintain the composer's intentions.

This dissertation is divided into six chapters. The first chapter explains the purpose and significance of the study. The second chapter presents an analysis about Wanderer Fantasy, D.760 composed by Schubert, employing Schenker analysis to elucidate important motives. Chapter 3 provides an analysis of Schubert-Liszt, Wanderer Fantasy for Piano and Orchestra, S. 366 and shows how Liszt transcribed the original to emphasize certain motives, and further, describes the development of the piano history. Chapter 4 delves into an analysis of Schubert-Liszt, Wanderer Fantasy for Two Pianos, S. 653a transcribed by Franz Liszt and further explains the historic development of piano, in particular Érard's grand piano. Chapter 5 explains the analysis of Schubert-Liszt, Wanderer Fantasy for Piano Solo, S.565a and expands upon Érard's grand piano. Finally, Chapter 6 leads to this paper's summary and conclusion.