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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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Design of audio power amplifier with Bluetooth connectivity
Bartoň, Jan ; Šotner, Roman (referee) ; Brančík, Lubomír (advisor)
This bachelor‘s thesis deals with the task of designing an audio amplifier, operating in class D, with a nominal output power of 2 x 80 W with Bluetooth connectivity, supplemented by an equalizer and a state display. A power supply and a user interface are designed as well. At first, research regarding audio amplifiers is made, followed by a more thorough description of class D operating principles. Afterwards the actual synthesis of the desired amplifier is presented, followed by the power supply design procedure. The correctness of the synthesis is later verified by simulations in PSpice and LTSpice. Theoretical design is then practically built, and its parameters are confronted with expected values by measurements.
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Mixing audio console with microphone preamplifier
Mecerod, Václav ; Šotner, Roman (referee) ; Kratochvíl, Tomáš (advisor)
Bachelor’s thesis on the theme "Mixing audio console with microphone preamplifier" deals with the design of an audio device for mixing signals from different sources. After a short theoretical introduction to issues mixing audio consoles, block diagram and circuit diagrams of each part are designed. These are redrawn into OrCAD Capture and using software PSpice simulations are performed. Configuration of the proposed mixing audio console is as follows: Two microphone preamplifiers with true differential inputs with switchable sensitivity, with the quad-band equalizer with tunable mid bands and adjustable delay. One line level input and one instrument input with three bands corrector. The output section consists of headphone and line level out.
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Design of 10-channel audio equalizer with optimization of frequency characteristic and spectral audio analyzer
Štěrba, Václav ; Dvořák, Radek (referee) ; Šotner, Roman (advisor)
This work deals with the design of a 10-zones equalizer with optimized frequency characteristics with a spectrum audio analyzer. In this work the problem of processing audio signals using equalization for filtering the interference frequencies, correction of frequency cover signal boost or suppression of the required zones of the audible spectrum are also analyzed. The influence of subjective perception of sound intensity of the audio signals reproduction and its use in working with equalizer is discussed too. The work describes the principles and usage of the audio-analyzer as a tool for the optimization of the audio equalization setting when ensuring the appropriate listening conditions of music reproduction, spoken word, sounds, etc. It also focuses on the signal source for testing audio-chains, their generation and measurement using the audio analyzer. The equalizer equipment, audio-analyzer generator of reference signals equipment and power supply are designed as a single unit.
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Three-channel mixing console
Sůra, Lukáš ; Boušek, Jaroslav (referee) ; Hejátková, Edita (advisor)
This work deals with the design and manufacturing of the three channel analog mixing consol. This console is capable of mixing low frequency signals. After a short introduction and distribution of panels is shown a block scheme and then designed circuit diagram. Each chanel is three-band, it is solved by using the equalizer combined with the logharitmic level controller (fader), the sensitivity controller (gain) and the interception button. The preamplifier and three-band equilizer are used to treat the microphone input. The mixing pult has six stereo inputs, three of them for the line levels signals (line in) and the last three inputs for a portable phonograph treated with pre-amplifiers (phono in). It also has three stereo line level outputs used by the main output (master out), the interception (booth out) and the headphones (headphones out). The output corrections are solved by using the five-band equalizer, which can be bridged. The linear level controller (crossfader) is placed beetwen channels. The logathmic level controller is used to setup the output signal.
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Software Multi-Effect for Post-Production of Pop Music
Trkal, Tomáš ; Glembek, Ondřej (referee) ; Černocký, Jan (advisor)
This diploma thesis deals with design and implementation of complex software system for post-production of popular music. The system was implemented as a plug-in module in C++ language using JUCE application framework. The emphasis was on creating a well arranged and intuitive graphic user interface. The plug-in provides a set of audio effects and processors that can be connected into the desired graph structure. For less experienced users, there is a database of preset configurations usable for a variety of input signals.
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Integrated stereo amplifier for home audio listening
Jaša, Jakub ; Petržela, Jiří (referee) ; Kratochvíl, Tomáš (advisor)
This bachelor thesis deals with design of a stereo amplifier, which consists of several functional blocks for the analog audio processing. This document describes the solution of individual functional audio blocks, detailed design including schematics and contains also other documents for the construction of the amplifier. The main topic is design, simulation, construction and evaluation of a power amplifier that uses power transistors ThermalTrak. The evaluation of the results of the whole implementation compares measured parameters with other types of amplifiers.
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Electronic Filtering Circuits with Arbitrary Frequency Characteristics
Klubus, Jan ; Vrba, Kamil (referee) ; Kubánek, David (advisor)
Master’s thesis deals with the issue of electronic filtering circuits with arbitrary frequency characteristics. First part of the thesis describes theoretical basis. Second part explores the possibilities of design procedures for filters with arbitrary frequency characteristics. Design procedures are demonstrated on examples accordingly to the presented methods, including their circuit implementation and computer simulation to verify the correctness of theoretical assumptions. Thesis also explores the possibilities of tuning circuit structures and electronic setting for characteristics using controllable active elements.
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Demonstrational programs for music record processing
Jonáš, Petr ; Rajmic, Pavel (referee) ; Číž, Radim (advisor)
This bachelor’s thesis describes the processing of music records and signals. Demonstration programs were created in Matlab. In this thesis were created function of equalization, transposition and sound effects. In this thesis was created application for determining the similarity of signals. For both programs was created graphic user interface.
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Mixing console for audio signals
Špaček, Jan ; Schimmel, Jiří (referee) ; Kratochvíl, Tomáš (advisor)
Bachelor's thesis on the theme "Mixing console audio signals" deals with the design of mixing console for mixing audio signals from several audio inputs. After a theoretical introduction to general issues and configuration mixing consoles the block diagram and then the full circuit diagram of a custom solution mixing console is proposed, whose configuration is as follows: Two mono inputs, designed as a switchable, where you can bring the microphone or line signal levels. They are equipped with a microphone preamp and attenuation articles, tri-band equalizers, panoramas and level controllers (faders). In addition, two stereo inputs, specifically designed for line level signals. They are equipped with line-preamp, panoramas and level controllers. Output signals of all input units correspond to a regular line level. On the main bus is then equipped stereo band equalizer, line output and headphone output. Bachelor's thesis comprises a technical documentation to implement functional prototype of the console, including the experimentally measured values.
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