Chord Progressor

NOTE: WIP refactorization:

• README is not updated yet.
• Chord symbol parser needs to be replaced with an external one.
• Chord voicing expansion algorithm needs to be improved.
• Unused functions aren't fully removed yet.

A simple musical program to connect the chords, and play the progression instantly.

Requirements

It's a python program, and the module pygame is required so that you can hear the chords played.

Usage

Demo:

pip install -r requirements.txt  # pygame
python progressor.py   # play the giant steps progression

The basic class in the module musicis Note. Then comes the Chord. Here are some functions you can use easily.

import music
import playsound as ps

n = music.Note('C')	# Create a note by name, the default octave is '4'
n2 = music.Note(39)	# You can also give the octave, or it's index:
n3 = music.Note('Eb', octave=2) 
			# But avoid setting the 'name' and 'index' at the same time
n.show_info()		# Print note1's information

ps.play(note1, duration=2)	# Play it

n.increment()			# Make it one semitone higher
n.increment(7)		# Make it a perfect fifth higher
n.decrement()			# One semitone Lower
n.decrement(7)		# P5 lower
n.move_by_one_octave_upward()			# 8va
n.move_by_one_octave_downward()		# 8vb
n.show_info()		# Show the details again

# Chords

c = music.Chord('C^9') 	# Create a chord by name
c2 = music.Chord('Db^7')	# Another one

c2.connect_to(c)		# Connect 'c2' to 'c' , in order to make the progression smooth

# Play


# Use the function 'play()' in the module 'playsound' to play the notes or chords.

ps.play(n) 			# Directly play it until the sound files stop
ps.play([n] * 3, duration=1)	# Set each note's duration to 1 second.

ps.play(c)			# Play the chord
ps.play(c, interval=0.07)	# Set the interval between notes to 0.07s, like 'arpeggio'
ps.play([c, c2], interval=0.1, duration=1) # Play the chords. 1s for each chord.

You can add your own chord types in the file 'music.py', just by giving the interval (note interval) in the dict.

Known issues

There are also some unexpected problems when connecting the chords. Improving the algorithm.