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Methods for high resulution spectral analysis
Pevný, Jindřich ; Schimmel, Jiří (referee) ; Frenštátský, Petr (advisor)
This thesis deals with the topic of high resolution spectral analysis. In the first part, selected methods are presented and afterwards compared based on the Matlab implementations. The problematics of reduction of crossterms in quadratic time–frequency distributions is also covered. The second part is focused on the implementation and optimization of the algorithm for real-time computation of smoothed Wigner distribution function.
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Multichannel Audio Signal Transmission Over Local Area Network
Kotouček, Filip ; Frenštátský, Petr (referee) ; Schimmel, Jiří (advisor)
This thesis deals with design and implementation of multi-channel audio signal streaming via local network. The aim was to choose suitable processor for the transmission of up to 32 channels of audio signal, which will be used for implementation. Also the low-latency ASIO driver was studied and was used to provide timestamps for synchronization. The transmission protocol was designed for signaling and for the real time stream. The actual transmission is provided by TCP protocol. In conclusion, I created the application for development board with choosen MCU. Finally whole solution was tested with real data.
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Software generator of test signals for acoustic measurements
Veselá, Petra ; Schimmel, Jiří (referee) ; Frenštátský, Petr (advisor)
The aim of the thesis is to create a VST2 plug-in module capable of generating input signals for different kinds of acoustic measurements. The opening section offers a theorethical overview of various test signals, their parameters and possibilities of their use during measurement. Subsequent divisions are then introducing a description of several methods of acoustic measurements and a brief overview of a VST interface. Last chapter offers the analysis of the created signals and discussion of their potential use in practice.
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Colour Noise Generator
Křivánek, Tomáš ; Rajmic, Pavel (referee) ; Frenštátský, Petr (advisor)
The main purpose of this bachelor thesis is explanation of „colored noise“, such as pink, brown, blue and more. There are completely subscribed coloured noises in this work, includig their importance and use for measurement in electroacustic and sound technology. Practical part of this thesis is focused on generating colored noises in Matlab, where we mainly work with model frequency spekter, frequency response and FIR filters.
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VST Plug-in for Dynamic Processing of Audio Signal
Zoň, Robin ; Frenštátský, Petr (referee) ; Schimmel, Jiří (advisor)
The aim of this thesis is the implementation of effects for adjusting the signal dynamics. This project includes four basic dynamic effects - compressor, expander, limiter and noise gate. The first part is developed in Matlab software. This solution offers signal sidechain input, display of signal waveforms of each block of sidechain branch, recording output signal and allows storage of output characteristics. In the second part, the effect is being realized using VST technology, which offers the possibility of changing the parameters in real time and displaying and recording the signal at various points within the control branch. Project also includes a brief discussion of the use of such dynamic effects in practice and collection of model examples to demonstrate the use of such effects.
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Implementation of the Parametric Equalizer into VST3 Plug-in
Pevný, Jindřich ; Schimmel, Jiří (referee) ; Frenštátský, Petr (advisor)
This thesis deals with the field of DSP (Digital Signal Processing), specifically with structures of digital parametric shelving filters, which can be used as building blocks of parametric equalizer. The objective of this thesis is to learn the options of indirect parametric filter design using decomposition of transfer functions into the function of an all-pass filter and implement these using Steinberg’s VST3 SDK.
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Application for Programming MIDI Controllers
Dolejší, Miloš ; Frenštátský, Petr (referee) ; Schimmel, Jiří (advisor)
This bachelor thesis deals with designing of an application which allows programming of controls on ControlFREAK and Bitstream 3x controllers via MIDI System Exclusive messages. The theoretical part contains an analysis of the MIDI communication protocol, including description of channel and system MIDI data. The practical part describes individual parts of the application and then presents and explains parts of the source code. The application has been created in the Visual Studio 2013 SDK using Windows Multimedia System library, which contains functions and structures necessary for accomplishing the application’s tasks. The communication between the PC and the controller is realized via MIDI-USB converter.
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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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Fractional-Octave Analysis of Acoustic Signals
Ryšavý, Marek ; Frenštátský, Petr (referee) ; Schimmel, Jiří (advisor)
The diploma thesis is focused on design and optimalization of digital octave and fraction-octave band filters. This thesis describe the behavior of filters in systems with fixed point arithmetics and investigate the impact of quantization coefficients for frequency response of filter. Filters, whitch has been designed, are implemented into simple software in C. Designed filters are in accordance with standard IEC 61260.
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