https://github.com/ekm507/mahdiO

Generate music and sound effects by python and mathematics (digital signal processing)
https://github.com/ekm507/mahdiO

audio digital-signal-processing harmonics midi music sound-effects wave

Last synced: 3 months ago
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Generate music and sound effects by python and mathematics (digital signal processing)

• Host: GitHub
• URL: https://github.com/ekm507/mahdiO
• Owner: ekm507
• License: gpl-3.0
• Created: 2020-03-28T21:40:58.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2020-10-17T15:59:15.000Z (about 4 years ago)
• Last Synced: 2024-04-05T19:32:08.650Z (7 months ago)
• Topics: audio, digital-signal-processing, harmonics, midi, music, sound-effects, wave
• Language: Python
• Homepage:
• Size: 135 KB
• Stars: 9
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# MahdiO: generate music

Generate music sound effects using mathematics.

## how to use

well, this project is not written the best way of it. I mean It works, but using this is a bit difficult.

there are some functions in this project. working with each other to craft you a music.  

the file `audio4.py` shows you an example how to use it.  

it simply gets a midi file as input and generates a music based on notes the file provides.

but I will make a better wiki for this later! I promise!

## files in this repo

* `functions.py` for generating basic audio functions.

* `notes.py` for generating notes.

* `midi_conversions.py` for converting note number to frequency.

* `instruments.py` for describing each instrument.

* `music.py` for generating music.

* `write.py` for writing generated audio into a wave file

* `read_midi.py` for reading notes data from `.mid` files

* `audio*.py` for test.

## how it works

any note we hear is consisted of a sine function with a main frequency summed up with it's harmonics- each with it's own amplitude.  

adding up sine functions, we create a new function for each instrument which is it's basic sound. see `harmonics` function in `functions.py`.

but this is not enough by itself to make a nice sound.  

amplitude of a sound changes dampingly over time. this is also a unique property of an instrument.

see `instrument*` and `push_instrument*` functions in `instruments.py`.

different notes have different frequencies. harmonics change respecting to main frequency. see `notes.py` to learn more.

combining notes by synthesizing them, we create a music. each note has a duration and a note number. look up `music.py` to see how it works.

so now we can generate sounds but we need notes! the funcion `read_midi` in file `read_midi.py` gets a midi file as input and extracts notes out of it to use.

now we are ready to generate a music from zero!  

look up `audio*.py` to see how a list of notes by time and some more details can make a nice music!  

finally we should save generated audio wave into a .wav (wave) file. the function `write_to_file` in `write.py` does it. and  when done, it's done!

## TODO

1. different tracks in midi file, each have their own instrument. add a support for this

2. get timing info from midi file

3. write better instruments.

4. make documentation for code. maybe rewrite this README file too.

5. make a wiki for developers so it will be easier to develope.