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Simulation of analogue audio effecs using the nonlinear filters
Otoupalík, Petr ; Káňa, Ladislav (referee) ; Mačák, Jaromír (advisor)
This thesis deals with a simulation of analogue audio effects using the nonlinear models that replace the analogue nonlinear devices in discrete domain. The thesis describes Volterra system model and simplified Volterra system model that can be realized in two ways, either Wiener model, or Hammerstein model. The method for the analysis and modeling of audio and acoustic nonlinear systems is presented in this thesis. This method allows through knowledge of the input swept-sine signal and the response of the analogue nonlinear system to the input signal to determine the coefficients of the discrete nonlinear system. This allows simulating the analogue nonlinear system in discrete domain. The method was first tested and then used successfully for simulation of the analogue nonlinear system in discrete domain. Concretely, it was simulated a musical guitar effect of the type of distortion. Last part of this thesis is devoted a description of VST technology and an implementation of VST plug-in module, which realizations Hammerstein model.
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Application for measurement of audio effects
Frenštátský, Petr ; Schimmel, Jiří (referee) ; Mačák, Jaromír (advisor)
The term paper is focused on the implementation and description of the application for the measurement of sound effects, which are implemented as plug-ins. Application measures in the time domain impulse response, transfer characteristics of dynamic effects. Application also shows the waveforms of attack and release time. In frequency domain application measures the frequency spectrum of the signal and frequency response of the system. The application is accompanied by the measurement of external effects by ASIO interface.
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Realization of the chorus effect with BBD
Černý, Filip ; Mačák, Jaromír (referee) ; Říha, Kamil (advisor)
The aim of this thesis is conception and construction of new laboratory device enabling realization of the musical effect CHORUS. Part of this work is theoretical analyses of effects using delay line and charge coupled devices with BBD. The next part is dealing with conception of particular sections of the device. The device is constructed by individual standards and construction recommendation. The device is constructed for measurement purposes therefore it contains various setting elements. The final part is dealing with testing of the device and with a manual for measuring on this device in laboratory of musical electronic.
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Optical side channel
Kolofík, Josef ; Mačák, Jaromír (referee) ; Martinásek, Zdeněk (advisor)
This thesis deals with the optical side channel and using a neural network as classifier of data. The first part deals with the basics of cryptography and attacks on the cryptographic module. The second part deals with methods of decapsulation the microcontroller, decapsulation technological processes and methods of detection of photons. The third part deals with the use of neural networks as the basis of recognition and data classification software. In conclusion, the thesis describes the procedure for creating this software, analyzes the source code and tests the functionality of this solution.
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Implementation of digital sound synthesizer in VST technology
Paukeje, Ján ; Schimmel, Jiří (referee) ; Mačák, Jaromír (advisor)
This thesis is focused on synthesis of audio signals and algorithm implementation by the help of technology designed for real-time processing. Analyzing individual methods of sound synthesis, the MIDI communication protocol and procedure of real-time signal processing. It is developed an appropriate software simulation ,on ground of studying these aspects, implemented by using C++ language. A result of this work is sound generator supporting MIDI protocol as a plug-in module designed for Windows platforms.
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Acoustical measurent in real environment
Mach, Václav ; Mačák, Jaromír (referee) ; Míča, Ivan (advisor)
This bachelor thesis discusses the issue of acoustical measurement. There are dierent signals described, which are used for this purposes, both MLS and esweep, compared their advantages and disadvantages and made some practical demonstrations of impulse response measurement. Furthermore, the fundamentals of reberbation time measurement are described in theory. The practical part of this thesis consists of the measurement application, written in the C++ language and mainly targeted for Linux systems. Qt multiplatform toolkit has been utilized for the GUI part.
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Implementation of digital metronome with oversampling in VST technology
Křupka, Aleš ; Přikryl, Lubor (referee) ; Mačák, Jaromír (advisor)
This bachelor’s thesis presents solution to requirement of implementation of digital metronome in VST technology. In the beginning, there is analysis of basic characteristics of digital metronome, that helps to suggest algorithm realizing digital metronome. Algorithm is encapsulated into C++ class with appropriate interface, which is suitable for usage in different technologies of digital sound signal processing. This way encapsulated metronome is implemented in VST technology as plug-in. For this reason, thesis contains a brief introduction to VST software development kit, definitions of its basic methods and way how to do graphical user interface of VST plug-in. For realizing of function enabling choice of any sound loaded from wav file, there is a description of RIFF format, that specifies the format of saving multimedia data into drive. Using this knowledge, the function of loading from wav file is implemented. In order to adjust sampling frequency of loaded sound, thesis deals with problems of sample rate conversion and implements resampling function.
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