This repo contains the code for the laboratory of the Audio Programming class of the Electronics with Music course (University of Glasgow). Throughout those labs we create audio programming objects such as oscillators and filters to learn about object oriented and audio programming.

In this course module, different aspects of audio programming were explored: optimized oscillators and filters generation, the use of buffering, object oriented programming, SWIG extensions, Qt GUI, MIDI listener, and multi-threading.

Digital Synthesizer

The final assignment tasked us in bringing all those elements together in a digital synthesizer which can be controlled through a Qt GUI. The application can be found in the Qt_App folder!

Requirements

• python: 3.7 recommended
• numpy: tested on 1.18
• swig 4.0
• QT 5 with PyQT5
• Physical MIDI Keyboard (virtual not tested)

Tested on : Windows 10 Pro (version 1903) macOS mojave (version 10.14.3) Ubuntu

Build Steps

open a terminal and access the folder:

cd tone_generator

Download all the needed python packages with:

pip install -r requirements.txt

Then run the setup file:

python setup.py build_ext --inplace

The app can then be run using:

python tone.py

or:

python3 tone.py

The following folders contain different intermediate tasks and labs that were carried out throughout the year.

More

labs fodler:

Contains basic Python and Audio Programming exercise and modules:

• Read and Write wavfiles module
• Sine/Triangle/Square oscillator class
• Recursive oscillator
• 2nd order IIR filter and concatenated Filters

swig_filter folder:

Contains the SWIG extension. The filter code written in Python (in labs/) is rewritten in C++. SWIG is used to generate a wrapper and python module. This makes the C++ extension accessible from Python, and greatly optimizes the application.

Qt_test folder:

Contains the Qt and multi-threading extension. A Qt GUI is added using PyQt as well as a MIDI listener and an audio player (Meep) which plays the filter tones. The frequency of the tone is defined by the MIDI notes. Multi-threading is used to make all those parts work together.