JOS3.jl

This project contains Julia implementations of functions or scripts from books by Julius Orion Smith III. These books are available online:

1. Mathematics of the Discrete Fourier Transform (DFT)
2. Introduction to Digital Filters
3. Physical Audio Signal Processing
4. Spectral Audio Signal Processing

This project aims to faithfully translate MATLAB functions from these books to Julia.

Getting Started

To use the Julia functions

1. Clone this repository
2. run TBD / FIXME

To design a minimum phase spectrum

s = randn(1024,1) + im*randn(1024);
s_minphase = mps(s);

Installing

TBD

Running the tests

To run the tests, the required software is

• MATLAB ( >= R2016a )
• Julia ( >= 0.6 )
• mexjulia

mexjulia must be installed and configured in MATLAB. Please see mexjulia for instructions.

Via the MATLAB terminal:

1. Add path to mexjulia, wherever it is located on your machine
   • addpath('C:\path\to\mexjulia')
2. Change directory to a particular JOS3.jl book
   • cd('C:\path\to\JOS3.jl\filters')
3. Run runtests.m
   • run('runtests.m')

This runs a test for each function that compares the original copy/pasted MATLAB function and the translated Julia function. If all returned elements of the MATLAB and Julia matrices are within a tolerance, the test is passed.

License

This project is licensed under the MIT License - see the LICENSE file for details

Acknowledgments

• Julius Orion Smith III for writing wonderful books and the original matlab implementations
• Tracy Wadleigh and other contributors of mexjulia for making testing much easier