def goodCells(cells):
if not all([len(i.pits) == len(i.durs) for i in cells]):
return False
pits = fh.concat([j.pits for j in cells])
#no leaping from non-tone chord
if not hm.inChord(cells[0].pits[-1], cells[0].chord) and abs(cells[0].pits[-1] - cells[1].pits[0]) > 1:
return False
pit_diffs = [abs(pits[i] - pits[i - 1]) for i in range(1, len(pits))]
#no three in a row
for i in range(2, len(pits)):
if abs(pits[i] - pits[i - 1]) == 6:
return False
if pits[i] == pits[i - 1] and pits[i - 2] == pits[i]:
return False
if (pits[i] % 7) == 3 and (pits[i - 1] % 7) == 6 or (pits[i] % 7) == 6 and (pits[i - 1] % 7) == 3:
return False
#no jumps bigger than 4
if max(pit_diffs) > 4:
return False
#no notes lower than -3
if min(pits) < -3:
return False
if max(pits) > 20:
return False
for i in range(1, len(cells)):
if (cells[i - 1].pits[-1] % 7) == 3 and cells[i].chord == [0,2,4] and (cells[i].pits[0] % 7) != 2:
return False
if (cells[i - 1].pits[-1] % 7) == 6 and cells[i].chord == [0,2,4] and (cells[i].pits[0] % 7) != 0:
return False
if len(cells) > 1:
if max(pits) - min(pits) < 4:
return False
return True
def genBass(main_passage, low = -4, high = 7):
prev_note = 4
main_cells = main_passage.cells
bass_cells = []
for main_cell in main_cells:
if main_cell.chord == [] or main_cell.chord == None:
bass_cells.append(gc.genBlankCell(2.0))
prev_note = 4
else:
main_pits = main_cell.beat_pits
pits = []
pits.append(pth.getClosestPCDegree(prev_note, main_pits[0][0], low = low, high = high))
if len(main_pits) == 2:
if hm.inChord(main_pits[1][0], main_cell.chord):
pits.append(sc.closestNoteDegreeInChord(note=pits[-1], chord=main_cell.chord, same=False, low = low, high = high))
durs = [1.0,1.0]
bass_cells.append(Chunk(pits = pits, durs=durs, chord=main_cell.chord, key = main_cell.key))
else:
durs = [2.0]
bass_cells.append(Chunk(pits = pits, durs = durs, chord=main_cell.chord, key = main_cell.key))
else: #if it's a 1.5, 0.5 or 1.5, 0.25,0.25
durs = [2.0]
bass_cells.append(Chunk(pits = pits, durs = durs, chord=main_cell.chord, key = main_cell.key))
prev_note = pits[-1]
return bass_cells
def genAlbertiEighths(main_cells, leading_eighths = True):
prev_note = 0
cells = []
for k in range(0, len(main_cells)): #loop through all cells
main_cell = main_cells[k]
if main_cell.chord == None or main_cell.chord == []:
if leading_eighths == False: #if we are coming to a close
new_pits = []
for pit in main_cell.pits:
new_pits.append(pth.getClosestPCDegree(prev_note, pit, low = -5, high = 14))
prev_note = new_pits[-1]
cells.append(Chunk(pits = new_pits, durs = main_cell.durs, key=main_cell.key))
else: #if we want eighths
main_pitches = main_cell.pits
main_durs = main_cell.durs
pits = []
tot_durs = [sum(main_durs[:i]) for i in range(0, len(main_durs))]
eighths = []
for i in range(0, 4):
found = False
for j in range(0, len(tot_durs)):
if tot_durs[j] == i/2.0:
eighths.append(main_pitches[j])
found = True
if found == False:
eighths.append(None)
if eighths[1] == None and eighths[2] == None and eighths[3] == None:
if main_pitches[0] % 7 == 1 or main_pitches[0] % 7 == 6: #if we're dealing with a dominant chord
first_note = (pth.getClosestPC(prev_note, 4))
else:
first_note = (pth.getClosestPC(prev_note, 0))
pat = random.choice([[0,-1,-2,-3], [0,-1,-2,-1]])
pits = [first_note + i for i in pat]
else:
if hm.matches(eighths[0], 0):
pits.append(pth.getClosestPCDegree(prev_note, 0))
elif hm.matches(eighths[0], 4):
pits.append(pth.getClosestPCDegree(prev_note, 7))
else:
print('error')
prev_note = pits[-1]
for note in eighths[1:]: #run through all of the possibilities of the notes
if hm.inChord(note, [0,2,4]):
pits.append(sc.closestNoteDegreeInChord(prev_note, [0,2,4], same=False))
elif hm.inChord(note, [4,6,8]):
pits.append(sc.closestNoteDegreeInChord(prev_note, [4,8], same=False))
elif note == None:
pits.append(prev_note + random.choice([-1,1]))
else:
pits.append(pth.getClosestPCDegree(prev_note, note))
prev_note = pits[-1]
cells.append(Chunk(pits=pits, durs=[0.5,0.5,0.5,0.5], key = main_cell.key))
else: #if there is a chord
inversion = False
chord = main_cell.chord
if chord == [1,3,5] or chord == [-2,0,2] or chord == [5,7,9]:
inversion = True
if k > 0:
if main_cells[k - 1].chord == [0,2,4] and chord == [0,2,4]:
inversion = True
'''if diff(main_cell.beat_pits[0], chord[1] == octave and diff(cells[-1].pits[-1], main_cells[k].beat_pits[0] == octave:
inversion = False
'''
eighths = getAlbertiEighths(chord, main_cell.pits, main_cell.durs, inversion=inversion)
#if isDiminished(eighths[0],cells[-1].pits[-1]:
# choose different end for cells[-1]
closest_eighths = []
for i in range(0, len(eighths)):
closest_eighths.append(pth.getClosestPC(prev_note, eighths[i]))
prev_note = closest_eighths[-1]
cells.append(Chunk(pits = closest_eighths, durs = [0.5,0.5,0.5,0.5], chord=chord, key=main_cell.key))
return cells
def goodCells(cells, melody = True):
for cell in cells:
if len(cell.pits) != len(cell.durs):
return False
if not all([len(i.pits) == len(i.durs) for i in cells]):
return False
pits = fh.concat([j.pits for j in cells])
durs = fh.concat([j.durs for j in cells])
beat_pits = fh.concat([j.beat_pits for j in cells])
beat_durs = fh.concat([j.beat_durs for j in cells])
#no more than 4 half notes
if durs.count(2.0) > 4:
return False
#no leaping from non-tone chord
if not hm.inChord(cells[0].pits[-1], cells[0].chord) and abs(cells[0].pits[-1] - cells[1].pits[0]) > 1:
return False
pit_diffs = [abs(pits[i] - pits[i - 1]) for i in range(1, len(pits))]
for i in range(1, len(pits)):
#no jumps of a seventh
if abs(pits[i] - pits[i - 1]) == 6:
return False
#no tritones
if (pits[i] % 7) == 3 and (pits[i - 1] % 7) == 6 or (pits[i] % 7) == 6 and (pits[i - 1] % 7) == 3:
return False
#no three in a row
for i in range(2, len(pits)):
if pits[i] == pits[i - 1] and pits[i - 2] == pits[i]:
return False
#no jumps more than an octave
if max(pit_diffs) > 7:
return False
#no two arpeggiated cells
for i in range(0, len(beat_pits) - 3):
if max(beat_pits[i]) - min(beat_pits[i]) > 4:
if max(beat_pits[i + 3]) - min(beat_pits[i + 3]) > 4 or max(beat_pits[i + 1]) - min(beat_pits[i + 1]) > 4 or max(beat_pits[i + 2]) - min(beat_pits[i + 2]) > 4:
return False
#no more than 3 half notes
for i in range(0, len(durs) - 1):
if durs[i] == 2.0 and durs[i + 1] == 2.0:
return False
#no more than 8 quarter notes
for i in range(0, len(durs) - 9):
if durs[i] == 1.0 and durs[i + 1] == 1.0 and durs[i + 2] == 1.0 and durs[i + 3] == 1.0 and durs[i + 4] == 1.0 and durs[i + 5] == 1.0 and durs[i+6] == 1.0 and durs[i + 7] == 1.0 and durs[i +8] == 1.0:
return False
#no notes lower than -3
if min(pits) < -3:
return False
if max(pits) > 20:
return False
for i in range(1, len(cells)):
if (cells[i - 1].pits[-1] % 7) == 3 and cells[i].chord == [0,2,4] and (cells[i].pits[0] % 7) != 2:
return False
if (cells[i - 1].pits[-1] % 7) == 6 and cells[i].chord == [0,2,4] and (cells[i].pits[0] % 7) != 0:
return False
if len(cells) > 1:
if max(pits) - min(pits) < 4:
return False
#no doubles of sixteenth notes
for i in range(1, len(pits)):
if pits[i] == pits[i - 1] and (durs[i] == 0.25 or durs[i - 1] == 0.25):
return False
if melody:
#no annoying 16ths
for i in range(0, len(pits) - 3):
if durs[i] == 0.25 and durs[i + 1] == 0.25 and durs[i + 2] == 0.25 and durs[i + 3] == 0.25:
if pits[i] == pits[i + 2] and pits[i + 1] == pits[i + 3]:
return False
#no more than 8 eighth notes
for i in range(0, len(beat_durs) - 3):
if beat_durs[i] == [0.5,0.5] and beat_durs[i + 1] == [0.5,0.5] and beat_durs[i+2] == [0.5,0.5] and beat_durs[i + 3] == [0.5,0.5]:
return False
#no ending on leading tone
for beat_pit in beat_pits:
if beat_pit[-1] % 7 == 6:
return False
return True