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Comparison of vowel formants with string and wind instrument formants
Steiner, Dominik ; Jirásek, Ondřej
This article deals with the analysis and subsequent comparison of the formant areas of sung vowels (soprano voice) with the formants of string (violin) and wind (flute) instruments. The article is primarily for musicians and arrangers for compositional and musical artistic purposes. However, it will also help linguists regarding the analysis of formants and resonant cavities for phonetic and phonological researches.
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Spectral analysis of Streicher and Bösendorfer pianos in the works of J. Brahms and F. Liszt
Pokorný, Marek ; Jirásek, Ondřej
This paper demonstrates the use of signal analysis methods, spectral analysis in particular, to illustrate the differences in musical timbre using two historical pianos from different eras and one contemporary piano as examples. The historical pianos in question are two 19th century grand pianos similar to those used by world-famous Romantic composers such as Franz Liszt and Johannes Brahms. The spectral analysis was performed using the MATLAB computing environment software in conjunction with the Steinberg Wavelab digital audio editor, and the grand piano samples were taken from the Pianoteq instrument VST plug-in developed by Modartt, which efficiently samples the real instruments for a near-identical piano sound and experience. The methods described in this article are suitable for analysing isolated tones as well as complex harmonies; depending on the specific application, the results can be interpreted in a number of ways.
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The comparison of voiced and unvoiced consonant pairs
Šablatúra, Šimon ; Smékal, Zdeněk (referee) ; Jirásek, Ondřej (advisor)
This bachelor’s thesis deals with the comparison of voiced and unvoiced consonants. The aim of the work is the analysis of the pronunciation of single consonants in different languages. Five pairs of voiced and unvoiced consonants were selected for this work and were recorded by five narrators. Subsequently, these recordings were analyzed in the Matlab, Praat and Excel programs, where spectra, formant regions and directional characteristics of single consonants were compared. These analyzes were related to the physiological formation of consonants in the given language. The selected languages for this work are Spanish, Slovak, Czech and Russian.
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Electric guitar innovation
Blaha, Marek ; Skvaril, Šimon (referee) ; Jirásek, Ondřej (advisor)
The bachelor thesis deals with the innovation of the electric guitar and its timbre when changing different components in the chain. The thesis describes what parts the guitar consists of and how its pickup works. It also deals with the manufacture of these components and their subsequent assembly. The focus is on pickups, bridges and bodies. Each time a component is changed, the spectrum is analyzed. In the end, the final prototype is assembled and compared to the original guitar.
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Analysis of tonal inharmonic spectra
Sztefek, Jiří ; Mojdl, Edgar (referee) ; Jirásek, Ondřej (advisor)
The bachelor thesis focuses on the spectral analysis of samples of tonal inharmonic instruments and their spectra, with a detailed focus on the present overtones, their properties, waveforms, relationships and numerical ratios between each other, interval types and categorization into critical bandwidths. Eight samples of acoustic and five samples of artificial instruments were analysed as part of the work. The analysis of the samples was performed using Fourier transform in MATLAB with a focus on FFT spectra and spectrogram. The results of the work are intended for musicians or scientists concerned with inharmonic components in sound and their properties.
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MIDI transducer design and cymbal colour upgrade with artificial components
Pospíšil, Martin ; Buzzi, Mário (referee) ; Jirásek, Ondřej (advisor)
This bachelor thesis deals with MIDI transducer design and cymbal color innovation with artificial components. The goal of the thesis was to design and fabricate a converter that converts audio signals from cymbals to the MIDI standard while capturing the widest dynamic range. Furthermore, a spectral analysis of several types of cymbals was performed and a program was created that adds artificial components such as filtered noise and additive inharmonic clusters to their acoustic color. The result of this work is a working prototype MIDI transducer and a program implemented in NI Reaktor software that allows the creation of acoustic presets with the upgraded cymbal color. The work met the stated objectives and provided a basis for further development in this area.
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Sensor for bars of mallet percussion instruments
Pribol, Sebastián ; Balík, Miroslav (referee) ; Jirásek, Ondřej (advisor)
This thesis addresses the issue of capturing melodic percussion instruments using dynamic sensors that can be attached to a musical instrument. It includes theoretical knowledge, analysis, and selection of appropriate sensing methods, and the actual implementation, which consists of testing, integration with MIDI, manufacturing of the device itself, and final calibration and adjustments for proper functionality. The device uses an ESP32-S3 Dev Kit N8R8 microcontroller, which was programmed in the Arduino IDE for proper operation. The device consists of twelve piezoelectric sensors that capture the dynamics of playing the musical instrument and send MIDI information to a DAW via a Bluetooth module.
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Comparison of vowel formants with string and wind instrument formants
Steiner, Dominik ; Musil, Jaroslav (referee) ; Jirásek, Ondřej (advisor)
This thesis deals with the analysis and subsequent comparison of the formant regions of sung vowels of different singing voices with the formants of string and musical instruments based on FFT and LPC analysis. The results of the work are primarily intended for musicians and arrangers for compositional and musical artistic purposes. However, it will also help linguists regarding the analysis of formants and resonant cavities for phonetic and phonological research.
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Spectral analysis of historical pianos
Pokorný, Marek ; Indrák, Michal (referee) ; Jirásek, Ondřej (advisor)
This bachelor thesis focuses on the spectral analysis of historical pianos in aim to identify and compare their acoustic and spectral characteristics. Three examples of pianos were analysed, including a significant piano owned by the composer Leoš Janáček. The analysis was performed on measured piano samples using Fourier transformation in MATLAB, with an emphasis on spectral parameters such as spectral centroid, flatness, skewness, sharpness and roughness, and on the visual representation of a spectrum over time -- the spectrogram. The results of the spectral analysis were used to interpret and evaluate differences in timbre of the pianos and their probable causes. The theoretical part of the thesis provides a brief overview of the history and design of the piano, explains the spectral descriptors used, and examines the properties of musical tones and the influence of psychoacoustics on the perception of pitch and timbre.
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