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block.py
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import random
import pandas as pd
from chords import chord_chooser, return_chords, return_bass, scale_pick
def block_structure(scale, beat, number, mode):
# Creating a chord progression
first_chord = 0
last_chord = 0
chordlist = []
if number != 1:
if mode == 'auto':
if scale in ['major', 'minor']: r = range(5)
if scale in ['custom1', 'custom2', 'custom3']: r = range(4)
while(first_chord != chord_chooser(last_chord, scale)):
chordlist = []
for i in range(0,number-1):
if i == 0:
first_chord = random.choice(r)
chordlist.append(first_chord)
next_chord = first_chord
else:
next_chord = chord_chooser(next_chord, scale)
chordlist.append(next_chord)
last_chord = chord_chooser(next_chord, scale)
chordlist.append(last_chord)
if mode == 'preset':
if scale == 'minor' or scale == 'major':
presets4 = [[0,1,2,5],
[0,1,5,3],
[0,2,1,4],
[0,2,3,2],
[0,2,3,3],
[0,2,4,3],
[0,2,5,0],
[0,3,2,5],
[0,4,1,5],
[0,4,2,1],
[0,4,2,3],
[0,4,5,3],
[0,4,5,5],
[0,5,0,3],
[0,5,4,1],
[0,5,4,5],
[2,0,3,4],
[2,1,5,0],
[2,3,4,5],
[2,4,5,0],
[3,0,2,5],
[3,2,0,0],
[3,4,1,0],
[3,4,3,0],
[4,0,3,1],
[4,0,3,3],
[4,2,0,3],
[4,5,1,0]
]
presets3 = [[0,1,2],
[0,1,2],
[0,1,5],
[0,2,0],
[0,2,5],
[0,3,3],
[0,4,1],
[0,4,3],
[0,4,5],
[0,5,0]
]
presets2 = [[0,2],
[0,4],
[0,5],
[2,0],
[3,0],
[3,4],
[4,0],
[5,0]
]
if scale == 'custom1':
presets4 = [[0,1,2,3]
]
presets3 = [[0,1,2]
]
presets2 = [[0,1]
]
if number == 4:
chordlist = random.choice(presets4)
if number == 3:
chordlist = random.choice(presets3)
if number == 2:
chordlist = random.choice(presets2)
else:
if scale in ['major', 'minor']: chordlist = [0]
if scale in ['custom1', 'custom2', 'custom3']: chordlist = [random.choice(range(4))]
# Selecting timeframe for each chord (depending on the number of bars)
block = pd.DataFrame(columns=['chords', 'time'])
if number == 4:
i = 0
for chord in chordlist:
block.at[i, 'time'] = int(i*(beat/number))
block.at[i, 'chords'] = chord
i += 1
if number == 3:
presets = [[0, beat/4, (3*beat)/4],[0, beat/2, (3*beat)/4], [0, beat/4, beat/2], [0, beat/8, beat/2]]
a = random.choice(presets)
i = 0
for chord in chordlist:
block.at[i, 'time'] = int(a[i])
block.at[i, 'chords'] = chord
i += 1
if number == 2:
presets = [[0, beat/4], [0, beat/2], [0, (beat/4)*3], [0, beat/8], [0, (beat/8)*7]]
a = random.choice(presets)
i = 0
for chord in chordlist:
block.at[i, 'time'] = int(a[i])
block.at[i, 'chords'] = chord
i += 1
if number == 1:
block.at[0, 'time'] = 0
block.at[0, 'time_end'] = int(beat)
block.at[0, 'chords'] = chordlist[0]
if number != 1:
block['time_end'] = block['time'].shift(-1)
block.time_end.iat[-1] = beat
block['duration'] = block['time_end'] - block['time']
return block
def block_to_chords(scale, block, root):
ch = return_chords(scale)
root = scale_pick(root)
notes = pd.DataFrame(columns = ['notes', 'time', 'time_end', 'duration'])
for i in range(len(block)):
for x in ch[block.at[i, 'chords']]:
notes.loc[len(notes)] = [x+root-12, block.at[i, 'time'], block.at[i, 'time_end'], block.at[i, 'duration']]
return notes
def block_to_bass(scale, block, root, beat):
ch = return_chords(scale)
root = scale_pick(root)
notes = pd.DataFrame(columns = ['notes', 'time', 'time_end', 'duration'])
chords = block['chords'].tolist()
bass = return_bass(scale)
for i in range(len(block)):
x = random.choice(range(int(block.at[i, 'time']), int(block.at[i, 'time_end']))) + 1
if random.choice(range(4)) == 0 and block.at[i, 'chords'] in [0]:
notes.loc[len(notes)] = [bass[chords[i]][0]+root-24, block.at[i, 'time'], x, x - block.at[i, 'time']]
notes.loc[len(notes)] = [bass[chords[i]][1]+root-24, x, block.at[i, 'time_end'], block.at[i, 'time_end'] - x]
else: notes.loc[len(notes)] = [bass[chords[i]][0]+root-24, block.at[i, 'time'], block.at[i, 'time_end'], block.at[i, 'time_end'] - block.at[i, 'time']]
# Random cut
#if random.choice(range(1)) == 0:
#
# rand_loop = random.choice([1/2, 1, 2, 2, 4, 4, 8])
# x = random.choice(range(1, rand_loop+1))
# y = random.choice(range(1, rand_loop+1))
# mnmx = [min([x,y]),max([x,y])]
# for i in range(len(notes)):
# if mnmx[0] <= notes.at[i, 'time_end']%rand_loop < mnmx[1]:
# notes.at[i, 'time_end'] = mnmx[0]
# elif mnmx[0] <= notes.at[i, 'time']%rand_loop < mnmx[1]:
# notes.at[i, 'time'] = mnmx[1]
# #notes.loc[len(notes)] = [notes.at[i, 'notes'], mnmx[1], notes.at[i, 'time_end'], mnmx[1] - block.at[i, 'time_end']]
#
# notes = notes.sort_index().reset_index(drop=True)
# Normalizing bass note
for i in range(len(notes)):
notes.at[i, 'notes'] = 36 + notes.at[i, 'notes']%12
return notes
def block_to_lead(scale, beat, block, root):
root = scale_pick(root)
notes = pd.DataFrame(columns = ['notes', 'time', 'time_end', 'duration'])
chords_list = block['chords'].tolist()
chords = return_chords(scale)
min_duration = block['duration'].min()
#num_notes_lead = int(random.choice(range(1, int(min_duration))))
num_notes_lead = 0
time_notes = [0]
for i in range(num_notes_lead):
x = random.choice([0.5, 1, 1, 1, 2, 2])
time_notes.append(time_notes[len(time_notes)] + x)
time_notes.append(min_duration)
for i in range(len(block)):
for j in range(len(time_notes)-1):
#notes.loc[len(notes)] = [random.choice(chords[chords_list[i]])+root, block.at[i, 'time'] + time_notes[j], block.at[i, 'time'] + time_notes[j+1], time_notes[j+1] - time_notes[j]]
#notes.loc[len(notes)] = [random.choice(chords[chords_list[i]])+root, block.at[i, 'time'], block.at[i, 'time_end'], block.at[i, 'duration']]
pass
pass
notes.loc[len(notes)] = [60+root, 0, beat, beat]
return notes
def block_to_pluck(scale, beat, block, root):
root = scale_pick(root)
notes = pd.DataFrame(columns = ['notes', 'time', 'time_end', 'duration'])
chords_list = block['chords'].tolist()
chords = return_chords(scale)
min_duration = block['duration'].min()
#num_notes_lead = int(random.choice(range(1, int(min_duration))))
num_notes_lead = 0
if min_duration >= 2:
for i in range(len(block)):
notes.loc[len(notes)] = [chords[chords_list[i]][0]+root+12, block.at[i, 'time'], block.at[i, 'time'] + 0.5, 0.5]
notes.loc[len(notes)] = [chords[chords_list[i]][1]+root+12, block.at[i, 'time'] + 0.5, block.at[i, 'time'] + 1, 0.5]
notes.loc[len(notes)] = [chords[chords_list[i]][2]+root+12, block.at[i, 'time'] + 1, block.at[i, 'time_end'], block.at[i, 'time_end'] - block.at[i, 'time'] - 1]
return notes