def index(self, token):
# scale length:
SL = len(self.notes)
# parse
root, infix, suffix = trisectToken(token)
root = self.normalizedNote(root)
# print "trisection["+token+"]:", root, infix, suffix
# get index of bare note
k = self.ring.index(root)
if k < 0:
return -1000
# add octave shifts
if len(infix) > 0:
octave = int(infix) - 1
else:
octave = 0
octave += count('^', suffix)
octave -= count('_', suffix)
k = k + SL*octave
# add semitione shifts
s = count('+', suffix)
s -= count('-', suffix)
k += s
return k
def index(self, token):
# scale length:
SL = len(self.notes)
# parse
root, infix, suffix = trisectToken(token)
root = self.normalizedNote(root)
# print "trisection["+token+"]:", root, infix, suffix
# get index of bare note
k = self.ring.index(root)
if k < 0:
return -1000
# add octave shifts
if len(infix) > 0:
octave = int(infix) - 1
else:
octave = 0
octave += count('^', suffix)
octave -= count('_', suffix)
k = k + SL * octave
# add semitione shifts
s = count('+', suffix)
s -= count('-', suffix)
k += s
return k
def freq(self, token, nSemitoneShifts, octaveNumber):
# Return frequency of note defined by token
# base calculation
root, suffix = splitToken(token)
a = alphaPrefix(root)
a = self.normalizedNote(a)
f = self.noteFreq[a]
# apply octave number
for i in range(0, octaveNumber):
f = 2*f
# apply transpose register
factor = pow(self.semitoneFactor, nSemitoneShifts);
# print "factor:", factor
f = f*factor
# process upward octave shifts
n = 0
np = numPrefix(token[len(a):])
if len(np) > 0:
n = int(np[0:1])-1
else:
n = 0
n += count('^', suffix)
for i in range(0, n):
f = 2.0*f
# process downward octave shifts
n = count('_', suffix)
if n > 0:
for i in range(0,n):
f = f/2.0
# process semitone shifts
n = count('+', suffix) - count('-', suffix)
if n > 0:
for i in range(0,n):
f = f*self.semitoneFactor
if n < 0:
for i in range(0,-n):
f = f/self.semitoneFactor
return f, root, suffix
def freq(self, token, nSemitoneShifts, octaveNumber):
# Return frequency of note defined by token
# base calculation
root, suffix = splitToken(token)
a = alphaPrefix(root)
a = self.normalizedNote(a)
f = self.noteFreq[a]
# apply octave number
for i in range(0, octaveNumber):
f = 2 * f
# apply transpose register
factor = pow(self.semitoneFactor, nSemitoneShifts)
# print "factor:", factor
f = f * factor
# process upward octave shifts
n = 0
np = numPrefix(token[len(a):])
if len(np) > 0:
n = int(np[0:1]) - 1
else:
n = 0
n += count('^', suffix)
for i in range(0, n):
f = 2.0 * f
# process downward octave shifts
n = count('_', suffix)
if n > 0:
for i in range(0, n):
f = f / 2.0
# process semitone shifts
n = count('+', suffix) - count('-', suffix)
if n > 0:
for i in range(0, n):
f = f * self.semitoneFactor
if n < 0:
for i in range(0, -n):
f = f / self.semitoneFactor
return f, root, suffix
