contribute.md

composiAI

composes music based on AI

BASIC KNOWLEDGE

1. What is piano?

Piano is a musical instrument that produces music by sequence of notes.

A standard piano has 9 octaves and 88 keys.

2. What is note?

A note is the pitch and duration of a sound, and also it is commonly represented in musical notation.

example => {C,C#,D,D#,E ,F,F#,G,G#,A,A#,B}

3. What is an octave, a scale and a chord?

A octave is set of notes of particular frequencies.

Octaves are numbered from 0 to 8

Each octave have 12 keys/notes

Example => 4th octave => {C4,C#4,D4,D#4,E4 ,F4,F#4,G4,G#4,A4,A#4,B4}

So, the notes present in an octave are => {C, C#, D, D#, E, F ,F#, G ,G#, A, A#, B}

A full step movement is a jump between three notes skipping the note in the middle, example a full step movement of C will end at D.

A half step movement is a jump between two notes, example a half step movement of C will be C#.

By using the formula => (2 full steps + 1/2 step + 3 full steps + 1/2 step) on the above octave, we get => {C, D E, F, G ,A, B, C} This is known as a scale, and since the octave befins from C, therefore this is the Cmajor Scale.

This can be denoted in the following ways-

C     D    E     F     G    A     B     C
1     2    3     4     5    6     7     8
SA    RE   GA    MA    PA   DHA   NI    SA
DO    RE   MI    FA    SOL  LA    TI    DO

From this the 1st 3rd and 5th note form a major chord.(A chord is a collection of notes in a specific order.) Major- 1 3 5 Cmajor- C E G

For more information check (https://musicmotivated.com/wp-content/uploads/2014/06/piano-guitar-bass-frequency-chart88keyspitches.jpg)

Exceptiions => 0th octave has two keys and 8th octave has one key in standard piano

4. what is the format of sequence of notes?

sequence of notes is given by example(Harry Potter Theme Music) =>

"-B E G F# E B A F#   E G F# Eb E -B
-B E G F# E B +D +Db +C Ab +C B Bb Eb G E
G B G B G +C B Bb F# G B Bb Eb E B
G B G B G +D +Db +C Ab +C B Bb Eb G E" 

5. what is +D or Ab or -B

so there are three tpyes of octave in a sequence.

1. main octave => let say 4th
2. prev octave => main-1 => 3th
3. next octave => main+1 => 5th

so here +D = D5 and Ab = G# and -B = B3

please refer above diagram clearly to understand better...

6. How we produce sound of every note?

every note has a particular frequency.

1. For Python

we use Beep(frequency,duration) in python for windows to produce sound of a particular frequency.

import winsound
frequency = 2500  # Set Frequency To 2500 Hertz
duration = 1000  # Set Duration To 1000 ms == 1 second
winsound.Beep(frequency, duration)

find function for linux is the task to be done

2. For Javascript

check out this blog Generate Sounds using Javascript!

FEATURES

Basic

1. play music based on notes
2. developer usuable library

Advanced

3. notes generated music to mp3 file
4. music generation base don AI

Teams

1. For Python 3
2. for Javascript

Implementation PLan

TASK 1 : creating relevant class of various objects needed in our project

TASK 2 : creating various functions needed in out classes

TASK 3 : testing on both linux and windows

Classes with Functions

1. • composer
     • input_notes_sequence()
     • set_octave()
     • play()
2. • note
     • format_note()
3. • octave
     • note_to_octave_list()
     • nth_octave_list()
4. • frequency
     • nth_octave_frequency_dict()
     • note_to_frequency()

Process

1. we take raw input as list and main octave number

example => ["C#","-D","F"," ","C#4","D3","F4"]

2. then formats the input notes according to main octave

3. then fetch the frequencies according to notes

4. at last play them