def key_signature_event(self, key="C"):
"""Returns the bytes for a key signature event."""
val = basic_keys.index(key) - 6
if val < 0:
val = 256 + val
key = a2b_hex("%02x" % val)
return self.delta_time + META_EVENT + KEY_SIGNATURE + "\x02" + key + "\x00"
def key_signature_event(self, key='C'):
"""Returns the bytes for a key signature event."""
val = basic_keys.index(key) - 6
if val < 0:
val = 256 + val
key = a2b_hex('%02x' % val)
return self.delta_time + META_EVENT + KEY_SIGNATURE + '\x02' + key\
+ '\x00'
def _bar2musicxml(bar):
doc = Document()
bar_node = doc.createElement("measure")
#bar attributes
attributes = doc.createElement("attributes")
#calculate divisions by using the LCM
l=list()
for nc in bar:
l.append(int(value.determine(nc[1])[0]))
lcm = _lcm(terms=l)*4
divisions = doc.createElement("divisions")
divisions.appendChild(doc.createTextNode(str(lcm)))
attributes.appendChild(divisions)
if bar.key.name in basic_keys:
key = doc.createElement("key")
fifths = doc.createElement("fifths")
#now we are going to guess which is the key of the bar
index = basic_keys.index(bar.key.name)
if index>13: index -= 12
fifths.appendChild(doc.createTextNode(str(index-6)))
mode = doc.createElement("mode")
mode.appendChild(doc.createTextNode("major")) #does mingus support more modes?
key.appendChild(fifths)
key.appendChild(mode)
attributes.appendChild(key)
time = doc.createElement("time")
beats = doc.createElement("beats")
beattype = doc.createElement("beat-type")
beats.appendChild(doc.createTextNode(str(bar.meter[0])))
beattype.appendChild(doc.createTextNode(str(bar.meter[1])))
time.appendChild(beats)
time.appendChild(beattype)
attributes.appendChild(time)
bar_node.appendChild(attributes)
chord=doc.createElement("chord")
for nc in bar:
time = value.determine(nc[1])
beat = time[0]
note_cont = nc[2]
is_chord=False
if note_cont:
#is a note_container with 2 or more notes a chord?
if len(note_cont)>1: is_chord=True
else: note_cont = [None]
for n in note_cont:
note = _note2musicxml(n)
if is_chord:
note.appendChild(chord)
#convert the duration of the note
duration = doc.createElement("duration")
duration.appendChild(doc.createTextNode(str(int(lcm*(4.0/beat)))))
note.appendChild(duration)
#check for dots
dot = doc.createElement("dot")
for i in range(0,time[1]):
note.appendChild(dot)
if beat in value.musicxml.keys():
type_node = doc.createElement("type")
type_node.appendChild(doc.createTextNode(value.musicxml[beat]))
note.appendChild(type_node)
#check for non-standard ratio
if time[2]!=1 and time[3]!=1:
modification = doc.createElement("time-modification")
actual = doc.createElement("actual-notes")
actual.appendChild(doc.createTextNode(str(time[2])))
normal = doc.createElement("normal-notes")
normal.appendChild(doc.createTextNode(str(time[3])))
modification.appendChild(actual)
modification.appendChild(normal)
note.appendChild(modification)
bar_node.appendChild(note)
return bar_node
def _bar2musicxml(bar):
doc = Document()
bar_node = doc.createElement("measure")
#bar attributes
attributes = doc.createElement("attributes")
#calculate divisions by using the LCM
l=list()
for nc in bar:
l.append(int(value.determine(nc[1])[0]))
lcm = _lcm(terms=l)*4
divisions = doc.createElement("divisions")
divisions.appendChild(doc.createTextNode(str(lcm)))
attributes.appendChild(divisions)
if bar.key.name in basic_keys:
key = doc.createElement("key")
fifths = doc.createElement("fifths")
#now we are going to guess which is the key of the bar
index = basic_keys.index(bar.key.name)
if index>13: index -= 12
fifths.appendChild(doc.createTextNode(str(index-6)))
mode = doc.createElement("mode")
mode.appendChild(doc.createTextNode("major")) #does mingus support more modes?
key.appendChild(fifths)
key.appendChild(mode)
attributes.appendChild(key)
time = doc.createElement("time")
beats = doc.createElement("beats")
beattype = doc.createElement("beat-type")
beats.appendChild(doc.createTextNode(str(bar.meter[0])))
beattype.appendChild(doc.createTextNode(str(bar.meter[1])))
time.appendChild(beats)
time.appendChild(beattype)
attributes.appendChild(time)
bar_node.appendChild(attributes)
global isTied #must last over barlines
for nc in bar:
time = value.determine(nc[1])
beat = time[0]
note_cont = nc[2]
is_first_of_group=True
prevTied = isTied
isTied = note_cont.tied
if not note_cont: note_cont = [None]
for n in note_cont:
note = _note2musicxml(n, isChord=not is_first_of_group)
is_first_of_group = False
#all but the last have a <chord/> element.
#convert the duration of the note
duration = doc.createElement("duration")
duration.appendChild(doc.createTextNode(str(int(lcm*(4.0/beat)))))
note.appendChild(duration)
#add tie if necessary.
if prevTied:
tied=doc.createElement("tie")
tied.setAttribute("type","stop")
note.appendChild(tied)
if isTied:
tied=doc.createElement("tie")
tied.setAttribute("type","start")
note.appendChild(tied)
#check for dots
dot = doc.createElement("dot")
for i in range(0,time[1]):
note.appendChild(dot)
if beat in value.musicxml.keys():
type_node = doc.createElement("type")
type_node.appendChild(doc.createTextNode(value.musicxml[beat]))
note.appendChild(type_node)
#check for non-standard ratio
if time[2]!=1 and time[3]!=1:
modification = doc.createElement("time-modification")
actual = doc.createElement("actual-notes")
actual.appendChild(doc.createTextNode(str(time[2])))
normal = doc.createElement("normal-notes")
normal.appendChild(doc.createTextNode(str(time[3])))
modification.appendChild(actual)
modification.appendChild(normal)
note.appendChild(modification)
bar_node.appendChild(note)
return bar_node
def _bar2musicxml(bar):
doc = Document()
bar_node = doc.createElement('measure')
# bar attributes
attributes = doc.createElement('attributes')
# calculate divisions by using the LCM
l = list()
for nc in bar:
l.append(int(value.determine(nc[1])[0]))
lcm = _lcm(terms=l) * 4
divisions = doc.createElement('divisions')
divisions.appendChild(doc.createTextNode(str(lcm)))
attributes.appendChild(divisions)
if bar.key.name in basic_keys:
key = doc.createElement('key')
fifths = doc.createElement('fifths')
# now we are going to guess which is the key of the bar
index = basic_keys.index(bar.key.name)
if index > 13:
index -= 12
fifths.appendChild(doc.createTextNode(str(index - 6)))
mode = doc.createElement('mode')
mode.appendChild(doc.createTextNode('major')) # does mingus support
# more modes?
key.appendChild(fifths)
key.appendChild(mode)
attributes.appendChild(key)
time = doc.createElement('time')
beats = doc.createElement('beats')
beattype = doc.createElement('beat-type')
beats.appendChild(doc.createTextNode(str(bar.meter[0])))
beattype.appendChild(doc.createTextNode(str(bar.meter[1])))
time.appendChild(beats)
time.appendChild(beattype)
attributes.appendChild(time)
bar_node.appendChild(attributes)
chord = doc.createElement('chord')
for nc in bar:
time = value.determine(nc[1])
beat = time[0]
note_cont = nc[2]
is_chord = False
if note_cont:
# is a note_container with 2 or more notes a chord?
if len(note_cont) > 1:
is_chord = True
else:
note_cont = [None]
for n in note_cont:
note = _note2musicxml(n)
if is_chord:
note.appendChild(chord)
# convert the duration of the note
duration = doc.createElement('duration')
duration.appendChild(
doc.createTextNode(str(int(lcm * (4.0 / beat)))))
note.appendChild(duration)
# check for dots
dot = doc.createElement('dot')
for i in range(0, time[1]):
note.appendChild(dot)
if beat in list(value.musicxml.keys()):
type_node = doc.createElement('type')
type_node.appendChild(doc.createTextNode(value.musicxml[beat]))
note.appendChild(type_node)
# check for non-standard ratio
if time[2] != 1 and time[3] != 1:
modification = doc.createElement('time-modification')
actual = doc.createElement('actual-notes')
actual.appendChild(doc.createTextNode(str(time[2])))
normal = doc.createElement('normal-notes')
normal.appendChild(doc.createTextNode(str(time[3])))
modification.appendChild(actual)
modification.appendChild(normal)
note.appendChild(modification)
bar_node.appendChild(note)
return bar_node
