Synth Test
This project provides classes for producing music notes and monophonic music. It is for learning and educational purpose.
The music output can be stored in a WAV file and can be played by this software and other music players. It can also plot the waveform on the GUI, generate scales and notes frequencies tables.
Music info
Musical notes represents sounds with definite pitches (sound frequency). Definite pitches come from instruments like piano, guitar, vocals, etc. Notes often come from the chromatic scale, with 12 pitches, each a semitone above or below another. The notes are:
C, C#, D, D#, E, F, F#, G, G#, A, A#, B
In this class each of this notes is represented by a number from 0 (C note) to 11 (B note). This 12 notes represents an octave. Each octave ends in a B note, then a new octave starts (C note).
For example: as we said, the the note number 11 is a B so the number 12 will be another C. This C will be one octave higher the other C. So we can call the first C, C0, the second C will be C1 and so on. The letter is the note name and the number is the octave.
Each note in this class can be represented as a number or by the note name followed by the octave number. Example:
| Note | Name | Frequency (Hz) | Wavelength (m) |
|---|---|---|---|
| 0 | C0 | 16.351597 | 21.098855 |
| 1 | C#0 | 17.323914 | 19.914667 |
| 2 | D0 | 18.354047 | 18.796943 |
| ... | |||
| 12 | C1 | 32.703195 | 10.549427 |
| 13 | C#1 | 34.647828 | 9.957333 |
| ... |
We can see that the C1 is twice C0 frequency. Although C1 is more acute, it produces a harmonic sound to C0. C2 will be twice the frequency of C1, and it keeps doubling. The human ear can listen to frequencies from 20 to 20000 Hz.
Installing and running
Anaconda distribution has all packages needed except pyaudio. I used Anaconda3 (which comes with python 3 interpreter).
Anaconda download: https://www.continuum.io/downloads
To install pyaudio on Windows:
python -m pip install pyaudio
On Linux:
pip install pyaudio
More pyaudio installation instructions at: http://people.csail.mit.edu/hubert/pyaudio/
License
Synth Test is licensed under the Apache 2 License, meaning you can use it free of charge, without strings attached in commercial and non-commercial projects. I would like to get (non-mandatory) credit in case you use this code in your project.