def test_book_example(self):
location = ChromaticScale.parse_notation("4:9")
print(location)
index = ChromaticScale.location_to_index(location)
print(index)
loc = ChromaticScale.index_to_location(index)
print(loc)
def is_location_inbounds(self, location):
"""
Determines if given chromatic location is in bounds of range.
Args:
location: chromatic location
Returns:
boolean indicating if in bounds.
"""
return self.is_inbounds(ChromaticScale.location_to_index(location))
def find_lowest_placement_in_range(self, placement):
"""
For a given chromatic placement (0, ..., 11) find the lowest chromatic index
in the range for it.
"""
if placement < 0 or placement >= 12:
raise Exception(
'Illegal placement value {0} must be between 0 and 11'.format(
placement))
start_partition = ChromaticScale.index_to_location(self.start_index)[0]
end_partition = ChromaticScale.index_to_location(self.end_index)[0]
lowest_index = -1
for partition in range(start_partition, end_partition + 1):
if self.is_location_inbounds((partition, placement)):
lowest_index = ChromaticScale.location_to_index(
(partition, placement))
break
return lowest_index
def test_scale(self):
scale = ChromaticScale.get_chromatic_scale(
ChromaticScale.parse_notation("0:9"),
ChromaticScale.parse_notation("8:0"))
start = ChromaticScale.location_to_index((0, 9))
end = ChromaticScale.location_to_index((8, 0)) + 1
for i in range(start, end):
logging.info('{0}{1} {1}'.format(
i, ChromaticScale.index_to_location(i), scale[i - start]))
assert is_close(scale[ChromaticScale.location_to_index((4, 9)) - start], 440.0), \
"Error A:4 = {0} should be 440.0".format(scale[ChromaticScale.location_to_index((4, 9)) - start])
assert is_close(scale[ChromaticScale.location_to_index((4, 0)) - start], 261.625565301), \
"Error C:4 = {0} should be 261.625565301".format(scale[ChromaticScale.location_to_index((4, 0)) - start])
def test_location_to_index(self):
for i in range(1, 4):
for j in range(0, 12):
index = ChromaticScale.location_to_index((i, j))
assert index == 12 * i + j