2.11 J. S. Bach C-Dur Prelude
=============================
In this Example I'm using the Chord of the C-Dur Prelude, BWV 846
.. code:: python3
from pyknon.genmidi import Midi
from pyknon.music import Rest, Note, NoteSeq
from music_generation import *
import numpy as np
import matplotlib.pyplot as plt
Chord definitions
~~~~~~~~~~~~~~~~~
.. code:: python3
C = np.array([ 0, 4, 7])
Cm = np.array([ 0, 3, 7])
Cdim = np.array([ 0, 3, 6])
CM7 = np.array([ 0, 4, 7, 11])
C7 = np.array([ 0, 4, 7, 10])
Cm7 = np.array([ 0, 3, 7, 10])
Cdim7 = np.array([ 0, 3, 6, 10])
Cdim6 = np.array([ 0, 3, 6, 9 ])
C6 = np.array([ 0, 4, 7, 9 ]) # inversion of Am7
Cm6 = np.array([ 0, 3, 7, 9 ])
Csus4 = np.array([ 0, 5, 7])
Csus2 = np.array([ 0, 2, 7])
Csus47= np.array([ 0, 5, 7, 10])
P = np.array([ 0,7]) # Power chord (Perfect unison, Perfect fifth)
B = np.array([ 0]) # Bass (Perfect unison)
major = np.array([ 0, 2, 4, 5, 7, 9, 11])
minor = np.array([ 0, 2, 3, 5, 7, 8, 10])
blues = np.array([ 0, 3, 5, 6, 7, 10])
tune\_211\_A
------------
For this tune I use the chord sequence of a famous classical piece. **J.
S. Bach C-Dur Prelude, Wohltemperirtes Klavier, BWV 846**
- Three Strings playing chords
- an acoustic bass
- Organ for the second base
- A Flute as solo voice
.. code:: python3
def tune_211_A():
tune_name = 'tune_211_A'
np.random.seed(54 ) # 79 33
bar, bpb = 36, 4 # bar: Takt , bpb: beat per bar
melody_len = bar * bpb
end_dur = 1.5
scales = [[1,'C',C],[1,'D',Cm7],[1,'G',C7],[1,'C',C],[1,'A',Cm],[1,'D',C7],[1,'G',C],[1,'C',CM7],[1,'C',C6],[1,'D',C7],
[1,'G',C],[1,'G',Cdim6],[1,'D',Cm],[1,'F',Cdim6],[1,'C',C],[1,'F',CM7],[1,'F',C6],[1,'G',C7],
[1,'C',C],[1,'C',C7],[1,'F',CM7],[1,'F#',Cdim6],[1,'G#',Cdim6],[1,'G',C7],
[1,'C',C],[1,'G',Csus47],[1,'G',C7],[1,'F#',Cdim6],[1,'C',C],[1,'G',Csus47],[1,'G',C7],[1,'C',C7],[1,'F',C],[1,'G',C],[1,'C',C]]
#end_scale = [[0.5,'C',Cm],[0.5,'C',P]]
end_scale = [[1,'C',P]]
pattern = pattern_gen(scales, end_scale, melody_len)
#bass1 = pattern_gen(bass1, end_scale, melody_len)
# Solo voice
range_1 = liniar_range(56,70,86,94)
rythem1, notenr_1 = ran_duration([1/16,1/8, 1/4,1/2], [0,3,3,0.5], melody_len,end_dur)
melody1 = acceptance_melody([-2,-1, 0, 1, 2],[1, 5, 1, 5, 1],pattern, 76, range_1, notenr_1, rythem1)
volumes1 = ran_volume([0,100], [1,6], notenr_1 )
notes1 = NoteSeq( [Note(no,octave=0, dur=du, volume=vo) for no,du,vo in zip(melody1,rythem1,volumes1)] )
# Bass1 Accustic
range_2 = liniar_range(30,38,50,62)
rythem2, notenr_2 = ran_duration([1/8, 1/4,1/2], [4,3,0], melody_len,end_dur)
melody2 = acceptance_melody([-2,-1, 0, 1, 2],[0, 3, 1, 3, 0],pattern, 50, range_2, notenr_2,rythem2)
volumes2 = ran_volume([0,100], [0,8], notenr_2 )
notes2 = NoteSeq( [Note(no,octave=0, dur=du, volume=vo) for no,du,vo in zip(melody2,rythem2,volumes2)] )
# Bass2 Organ
range_6 = liniar_range(30,38,50,62)
rythem6, notenr_6 = ran_duration([1/8, 1/4,1/2], [0,1,1], melody_len,end_dur)
melody6 = acceptance_melody([-2,-1, 0, 1, 2],[1, 1, 1, 1, 1],pattern, 48, range_6, notenr_6,rythem6)
volumes6 = ran_volume([0,120], [0,8], notenr_6 )
notes6 = NoteSeq( [Note(no,octave=0, dur=du, volume=vo) for no,du,vo in zip(melody6,rythem6,volumes6)] )
# Chord Voices
range_3 = liniar_range(46,56,73,78)
rythem3, notenr_3 = ran_duration([1/8, 1/4,1/2], [1,3,1], melody_len,end_dur)
melody3 = acceptance_melody([-2,-1, 0, 1, 2],[0, 3, 1, 3, 0],pattern, 71, range_3, notenr_3,rythem3)
volumes3 = ran_volume([0,100], [0,8], notenr_3 )
notes3 = NoteSeq( [Note(no,octave=0, dur=du, volume=vo) for no,du,vo in zip(melody3,rythem3,volumes3)] )
range_4 = liniar_range(46,56,73,78)
rythem4, notenr_4 = ran_duration([1/8, 1/4,1/2], [1,3,1], melody_len,end_dur)
melody4 = acceptance_melody([-2,-1, 0, 1, 2],[0, 3, 1, 3, 0],pattern, 66, range_4, notenr_4,rythem4)
volumes4 = ran_volume([0,100], [0,8], notenr_4 )
notes4 = NoteSeq( [Note(no,octave=0, dur=du, volume=vo) for no,du,vo in zip(melody4,rythem4,volumes4)] )
range_5 = liniar_range(46,56,73,78)
rythem5, notenr_5 = ran_duration([1/8, 1/4,1/2], [1,3,1], melody_len,end_dur)
melody5 = acceptance_melody([-2,-1, 0, 1, 2],[0, 3, 1, 3, 0],pattern, 60, range_5, notenr_5,rythem5)
volumes5 = ran_volume([0,100], [0,8], notenr_5 )
notes5= NoteSeq( [Note(no,octave=0, dur=du, volume=vo) for no,du,vo in zip(melody5,rythem5,volumes5)] )
plot_range([range_1,range_2,range_3],['Flute','Bass','Strings'],tune_name)
instruments = [71,43,49,49,49,16]
notes = [notes1,notes2,notes3,notes4,notes5,notes6]
return notes, instruments,tune_name
.. raw:: html
tune__211_A
tune_211_A
**Instruments:** Available are at lest the 128 General-Midi (GM)
Instruments. Depending on the sound-fonts there is a bigger choice. A
list of the GM instruments can be found here.
https://jazz-soft.net/demo/GeneralMidi.html
.. code:: python3
def gen_midi():
# squezze into a MIDI framework
notes, instruments, tune_name = tune_211_A() # <--- select a tune <<-- <<<<<<<<<--- select a tune -----
nTracks = len(notes)
m = Midi(number_tracks=nTracks, tempo=120, instrument=instruments)
for iTrack in range(nTracks):
m.seq_notes(notes[iTrack], track=iTrack)
#--- write the MIDI file -----
midi_file_name = tune_name +'.mid' # set the name of the file
m.write(midi_file_name)
return midi_file_name
.. code:: python3
######--- Main ---######
midi_file_name = gen_midi()
midi_play(midi_file_name)
midi_audio(midi_file_name)
midi_png(midi_file_name)
.. image:: output_9_0.png
External **Music\_Generation** library
--------------------------------------
This library changes from version to version. New or changed code is
first explained above. This is a copy of music\_generation.py
.. literalinclude:: music_generation.py
:language: python
tune_211_A