GitHub - Krun/vandal-equalizer: A simple audio equalizer programmed with VHDL. Its purpose is to serve as a learning exercise of VHDL, performing some basic digital signal processing tasks such as filtering, level detection, reverb effects and gain adjustment.

#vandal-equalizer

##Overview

vandal-equalizer is a simple audio equalizer programmed with VHDL. Its purpose is to serve as a learning exercise of VHDL, performing some basic digital signal processing tasks such as filtering, level detection or gain adjustment.

The project comprises the implementation of the following modules, each of which can be studied as independent VHDL examples:

IIR digital bandpass filters
Gain adjustment for each audio band
Delay module (reverb effect)
Simulated VU meter (level detection)

The project has been developed with ModelSim PE Student Edition 10.1. Although it has not been simulated with any other tool, it should be able to work with any simulation software compatible with VHDL.

The quality of the implemented modules may not meet high performance standards. The purpose of this implementation is exclusively educational, and therefore a proper audio processing ability is not guarranteed.

##Installation

I recommend using ModelSim for simulation of this project. A free copy can be obtained from their site as long as it is used for educational purposes.

If you are a student, visit http://model.com/update/modelsim-downloads and get the free copy they offer. There are also many other compatible tools, such as GHDL and GTKWave, which can be used for VHDL simulation.

Download the source files from github:

git clone https://github.com/Krun/vandal-equalizer.git

Compile and run the simulation. Testbench files are provided, although they do not provide an exhaustive demonstration of the implemented capabilities.

##FPGA Embedding

This project has not been made with the purpose of being embedded in FPGA's, and therefore, its implementation is not adequate for its direct embedding.

Name		Name	Last commit message	Last commit date
Latest commit History 59 Commits
doc		doc
matlab		matlab
signals		signals
.gitignore		.gitignore
Enunciado_lsed1112-v1.4.pdf		Enunciado_lsed1112-v1.4.pdf
FA.vhd		FA.vhd
FA_m.vhd		FA_m.vhd
README.md		README.md
adder_16b.vhd		adder_16b.vhd
am_block.vhd		am_block.vhd
carry_bypass_block.vhd		carry_bypass_block.vhd
csm_block.vhd		csm_block.vhd
csm_lastblock.vhd		csm_lastblock.vhd
delay.vhd		delay.vhd
dummy		dummy
equalizer_system.vhd		equalizer_system.vhd
equalizer_system_m.vhd		equalizer_system_m.vhd
filehandler.vhd		filehandler.vhd
filter_bench.vhd		filter_bench.vhd
filter_bench_m.vhd		filter_bench_m.vhd
filter_generic.vhd		filter_generic.vhd
filter_generic_m.vhd		filter_generic_m.vhd
list		list
multiplier_16x16b.vhd		multiplier_16x16b.vhd
output.dat		output.dat
output2.dat		output2.dat
reverb.vhd		reverb.vhd
reverb_m.vhd		reverb_m.vhd
tadder_16b.vhd		tadder_16b.vhd
tdelay.vhd		tdelay.vhd
tequalizer_system.vhd		tequalizer_system.vhd
tfilter_bench.vhd		tfilter_bench.vhd
tfilter_generic.vhd		tfilter_generic.vhd
tfilter_impz.vhd		tfilter_impz.vhd
tmultiplier_16x16b.vhd		tmultiplier_16x16b.vhd
treverb_m.vhd		treverb_m.vhd
tsystem_adjust.vhd		tsystem_adjust.vhd
tsystem_reverb.vhd		tsystem_reverb.vhd
tvumetro_it.vhd		tvumetro_it.vhd
txt_util.vhd		txt_util.vhd
vumetro.vhd		vumetro.vhd
vumetro_it.vhd		vumetro_it.vhd

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