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Analysis of the spectra of violas with respect to their different bodies
Smola, Ondřej ; Indrák, Michal (referee) ; Jirásek, Ondřej (advisor)
This work focuses on the spectral analysis of three different violas, the modern one, the renaissance one and viola da gamba. Further the work focuses on the formant areas, resonance modes of its resonance corpus and how the resonance modes influence the tembre of the instruments. The theoretical part deals with the history of viola, acoustic-mechanical features, which influence the wood resonance. The practical part focuses on creating the graphic forms of required data needed for spectral analysis, identifying the resonance modes of the instruments and directional characteristics. The sound spectrums of all instruments are compared across the whole practical part. The practical part contains spectrograms, graphs of LPC analysis, graphs of directional radiation and table with formant frequencies of both instruments.
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Experimental granular software with spatial setting
Pospíšil, Tomáš ; Dlouhý, Dan (referee) ; Indrák, Michal (advisor)
This thesis deals with a design and realization of the experimental software, which has the task to distribute the granular synthesis into surround sound, specifically into the octofonic sound system. The software is designed as a VST3 plugin, which was created in a JUCE framework. Apart of problematics mentioned above the thesis also contains theoretical and technical knowledge linked with granular synthesis, surround sound and a form of realization of a resulting software. The end of this thesis is dedicated to the testing phase and deficits of resulting software.
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VST granular plugin with experimental input and output settings
Kalinič, Jan ; Dlouhý, Dan (referee) ; Indrák, Michal (advisor)
This thesis discusses the development of a plug-in module that is able to implement granular synthesis with help of experimental methods of parameter value settings. Graphic designs and schemes were created in the vector graphics editor Inkscape. The separate plug-in was programmed in C++ language using the JUCE framework and VST3 technology. With a use of this module, granular synthesis can be performed over a predetermined sample, but also over the stream of an audio channel of a digital audio station. The module also includes blocks with other types of sound synthesis, which can also be modified in experimental ways. Thanks to its properties, the plug-in can be applied as an effect over one sound channel in the mixing section of an audio station.
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Electroacoustic Hardware Musical Instrument - Sampler with Unusual Controlers
Dudáš, Martin ; Indrák, Michal (referee) ; Dlouhý, Dan (advisor)
This bachelor thesis describes the design and implementation of an electroacoustic hardware instrument with unusual controls. The experimentalism of the instrument consist of, for example, parameter control based on surrounding light or parameter control by hand movement. The main part of the instrument is the Arduino development board, which controls the Sunvox modular synthesizer on the Raspberry Pi microcomputer. Communication between the Arduino and the synthesizer takes place via MIDI messages. The software part is programmed in the Arduino IDE development environment in C++.
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Experimental Software Synthesizer and Sequencer
Fadieiev, Heorhii ; Indrák, Michal (referee) ; Dlouhý, Dan (advisor)
This bachelor thesis is devoted to an experimental software synthesizer and sequencer. Its main goal is the realization of an experimental electroacoustic musical instrument based on a design created within the semestral thesis. The unique characteristic of this synthesizer is the possibility of assigning to each tone a different waveform from the field of subtractive synthesis, but also amplitude and frequency modulation, as well as the possibility of creating a complicated rhythmic structure. The work is divided into several parts. The first one deals with the collection of theoretical knowledge focused on the topic of sound synthesis, MIDI and software program Max. The second part of the work presents the design of an experimental instrument taking into account the block diagram of the synthesizer, its sequencer and generator. The next part of the work deals with the implementation of the instrument, describes its appearance, GUI, data storage in its memory and analyzes the patch of the synthesizer. The last part describes practical experience and general characteristics of the resulting instrument.
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The Evaluation of masking of harmonic components in a mixture
Kovanda, Jindřich ; Indrák, Michal (referee) ; Jirásek, Ondřej (advisor)
This thesis deals with design and creation of listening test in which its respondents were setting certain harmonic of the tone to mixture of up to 16 harmonics. The respondents were setting intensity of the harmonic to the border position, in which the harmonic was not masked by the other harmonics in the tone and in which the harmonic stood up from the mixture. The respondents were stetting the harmonics from the first to sixteenth, in various types of the spectrum, pitch and intensity of the tone. Based on the results relations were found which determine how the perception of masking of harmonics vary with their order in the spectrum.
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The Program simulating the mutes of brass instruments
Košař, Vojtěch ; Indrák, Michal (referee) ; Jirásek, Ondřej (advisor)
This Master’s thesis deals with the creation of a program that simulates an impact of sound mutes on the timbre of a trombone and a trumpet. The simulation in the Reaktor 6 environment is based on an analysis of this impact which compares the spectra and formant regions retrieved from the MATLAB environment. The analysis takes into account also the impact on harmonic overtones. Another part of this work is focusing on the theory of a trombone and a trumpet, their brief history, the parts they are consisting of and the principle of tone formation. In the Reaktor 6 environment there has been created also a sampler functioning as a virtual instrument for the trumpet and the trombon. The last part of the work deals with creating a simulation program with its structure and evaluation.
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Analysis of pitch perception depending on the spectrum
Slávik, Martin ; Indrák, Michal (referee) ; Jirásek, Ondřej (advisor)
This thesis is dealing with the research of the influence of individual harmonic components on the perception of sound height. As a part of the work has been made an internet questionnaire on a web address www.analyzavyšek.9e.cz, where individual respondents completed listening test compound of 46 samples. This experiment is based on semantic differential method. Individual samples are compound of sine wave – tone and examined sample, which respondents evaluates on three bipolar scales. The samples were either modelled by additive synthesis or modified sampled sounds of instruments. Individual samples were divided to four major groups and other minor groups for clarity. The purpose was to find which parts, combinations and harmonic components of sound and tone can affect perception of tone height.
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