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Analysis of Influence of Hardness and Alteration of Piano Hammer on Strength and Spectrum of Signal
Mikulášková, Aneta ; Musil, Jaroslav (referee) ; Jirásek, Ondřej (advisor)
The bachelor’s thesis deals with the analysis of the time-varying spectrum of sound of the piano series 125 and M 110 by PETROF and the influence of intonation on this spectrum. It analyzes the higher harmonic components in relation to the force applied to strings and the use of variously tuned hammers. Bachelor’s thesis observes the effect of the dynamics of keystroke and intonation on the pitch of the tone in its time and frequency plane and tone’s energy loss in relation with the dynamics. Further, the thesis describes the way of measuring and recording the captured tone samples and their subsequent processing and analysis in the application created in MATLAB development environment.
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Spectral analysis of flute organ whistles and their comparison
Sommer, Tomáš ; Michálková Slimáčková, Jana (referee) ; Jirásek, Ondřej (advisor)
This work is focused on the problems of spectral analysis of flutes stops in organ pipes. The first part of this work is about terminology of organ pipes. This theoretical part is also focused on the problem of harmonic analysis with the use of mathematical signal processing methods, which allows this analysis. The second part of this work deals with measuring methods of specific organs and acquiring sound samples and their evaluation and spectrum description.
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Analysis and comparison of spectra in different piano models
Peloušek, Tomáš ; Přikryl, Lubor (referee) ; Jirásek, Ondřej (advisor)
This work focuses on the topic of analysis of the time varying spektrum of the piano. The introduction deals with the historical development of the piano, of its individual parts and the way they influence the tone colour. The subsequent theoretical part is focused mainly on the topic of spectral analysis in the musical concept of sound colours. In the following part a measuring of particular musical instruments is described, these experiments being conducted in an anechoic chamber provided by the instrument producer. It also lists the various methods and calculations used in the process and the conclusion presents analysis of acquired samples.
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The software sampler with sounds of of the dulcimer
Bičan, Jan ; Přikryl, Lubor (referee) ; Jirásek, Ondřej (advisor)
Major aim of this thesis is to create VST plugin module, which would be an output part of electronic cimbalom (dulcimer). Thesis explains basic terms at first, such as sampler, cimbalom, VST, MIDI, microphones and microphone techniques for recording. Then it describes particular segments of creating a software sampler with cimbalom samples. That includes recording each of individual cimbalom tones, sorting and editing these samples and implementing to VST technology. Thesis also describes instrument’s difficulties and differences from other related plugin modules and offers solution. There is a thesis’s assessment at the end of the document, where is mentioned its progress, testing with hardware components of electronic cimbalom and its imperfections with suggestions of future improvement.
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Design and construction of sensing part of the cimbalon
Nop, Patrik ; Vrba, Kamil (referee) ; Jirásek, Ondřej (advisor)
This term paper focuses on the design of several possible methods of electroacoustic transduction (further called pickup), specifically of virtual strings of the electronic cimbalom. The paper is based on the problems associated with the classical cimbalom’s design, as well as with its method of tone production. For each of the proposed methods I have made use of my own experiences with guitar pickup, laser harp function, MIDI controller capabilities, and the properties of electret microphones. Most of the methods are ones that I developed and tested in practice, some of which I am still working on and will include in my subsequent Bachelor’s thesis.
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Design and construction of MIDI interface for sensor strings
Korytář, Matěj ; Přikryl, Lubor (referee) ; Jirásek, Ondřej (advisor)
This work focuses on problematics of MIDI converter design and construction for cimbalom. There is briefly described acoustic musical instrument in terms of tone creation and construction. Further is discussed possibilities of string sensing or other ways to capture performance. In the following chapter is described MIDI protocol in terms of history, interface and types of transmitted messages. There is also said requirements for converter's chip and way to connect it. Further is described a method of converting signal from sensors and following coding to MIDI protocol including used program with detailed specifications. In conclusion is discussed several future extension.
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Spectrum analysis of the violin
Hanzálek, Pavel ; Smékal, Zdeněk (referee) ; Jirásek, Ondřej (advisor)
This work focuses on the problems of sound spectrum analysis and directional characteristics of the violin. The beginning of the work deals with the development of the violin, generally about timbre and directional characteristics. The theoretical part also deals with different types of sound spectra and LPC analysis on general. The practical part deals with practical tasks of work such as a description of the application created in MATLAB for examination of the time spectrum of tones, FFT spectra, formants by LPC analysis and display of directional characteristics. It also deals with the describing the methods, the process of sensing and measuring two different violins with different types of strings and age of corpus.
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