def simple_transpose(c, full, interval, up):
# determine whether can transpose by a full octave (only want to
# transpose to nearest octave)
# TODO: introduce recursive calls so track transposes itself
# until it is within range, using full octave jumps unless
# necessary to do half steps
if (full):
for i in range(len(c)):
for j in range(len(c[i])):
for k in range(len(c[i][j])):
for l in range(len(c[i][j][k][2])):
if (up):
c[i][j][k][2][l].octave_up()
else:
c[i][j][k][2][l].octave_down()
else:
for i in range(len(c)):
for j in range(len(c[i])):
for k in range(len(c[i][j])):
for l in range(len(c[i][j][k][2])):
n = Note()
if (up):
c[i][j][k][2][l] = n.from_int(Note.__int__(c[i][j][k][2][l]) + interval)
else:
c[i][j][k][2][l] = n.from_int(Note.__int__(c[i][j][k][2][l]) - interval)
'''
else:
for i in range(len(c)):
c[i] = c[i].transpose(interval, up)
'''
return c
def notes_to_lsa_bin(notes, xylo, lsa_ordering):
# convert to int so that sharps of one note and flat of next mean
# the same thing
keys = [ Note.__int__(Note(n)) for n in lsa_ordering ]
vals = range(len(lsa_ordering))
# first lsa's note mapped to 0, second lsa's note mapped to 1, ...
lsa_dict = dict(zip(keys, vals))
bnry = ['0'] * len(lsa_dict)
for note in notes:
# flip LSA to 'on' state for that note
bnry[lsa_dict[Note.__int__(note)]] = '1'
# so that number of leading zeros do not affect place of 'on' LSAs
bnry.reverse()
bnry = ''.join(bnry)
# int whose binary represents the on and off states of all LSAs
# at a given time
combo = int(bnry, 2)
return combo
def transposer(c, lowest, highest, xylo):
'''
5 cases:
1) lowest < xylo.range[0] and highest > xylo.range[1]
2) lowest < xylo.range[0] and highest < xylo.range[0]
3) lowest > xylo.range[1] and highest > xylo.range[1]
4) lowest < xylo.range[0]
5) highest > xylo.range[1]
(1) definitely requires better_transpose
(2) and (4) require better_transpose if highest + (xylo.range[0] - lowest) > xylo.range[1]
(3) and (5) require better_transpose if lowest - (highest - xylo.range[1]) < xylo.range[0]
'''
xylo_low = Note.__int__(xylo.range[0])
xylo_high = Note.__int__(xylo.range[1])
if (lowest < xylo_low and highest > xylo_high):
c = better_transpose('foo', 'bar')
elif (lowest < xylo_low):
# minimum number of half steps to transpose by such that lowest
# note in the entire composition is within the range of the
# instrument
interval = xylo_low - lowest
if (highest + interval > xylo_high):
c = better_transpose('foo', 'bar')
else:
# whether you can transpose a full octave
full = False
if (highest + interval + 12 <= xylo_high): full = True
c = simple_transpose(c, full, interval, up = True)
elif (highest > xylo_high):
interval = highest - xylo_high
if (lowest - interval < xylo_low):
c = better_transpose('foo', 'bar')
else:
full = False
if (lowest - interval - 12 >= xylo_low): full = True
c = simple_transpose(c, full, interval, up = False)
return c
def rebuild_composition(old, xylo, cutoff):
lowest = Note.__int__(Note('C', 8))
highest = Note.__int__(Note('C', 0))
new = Composition()
for i in old.selected_tracks:
t = Track()
t.instrument = xylo
for bar in old[i]:
b = Bar()
b.key.name = bar.key.name
b.set_meter(bar.meter)
# note value per beat == the denominator in time signature
dem = b.meter[1]
for lst in bar:
value = lst[1]
if (is_garbage(value, dem, cutoff[old.selected_tracks.index(i)])):
continue
# do not include lists without notes
if (not lst[2]):
continue
nc = NoteContainer()
for note in lst[2]:
if (Note.__int__(note) < lowest): lowest = Note.__int__(note)
if (Note.__int__(note) > highest): highest = Note.__int__(note)
nc + note
b.place_notes(nc, value)
t.add_bar(b)
new.add_track(t)
# can't do the transposing until all notes in all tracks have been
# compared against lowest and highest, which is why it is done here
n1 = Note()
n2 = Note()
low = n1.from_int(lowest)
high = n2.from_int(highest)
# print("lowest and highest notes:", low, high)
if (not xylo.notes_in_range([low, high])):
new = transposer(new, lowest, highest, xylo)
return new