def all_note_occurences(notes):
note_occurences = {}
for key, value in notes.items():
scale_note = value['scale_note']
if scale_note not in note_occurences.keys():
note_occurences[scale_note] = [key]
elif key not in note_occurences[scale_note]:
note_occurences[scale_note].append(key)
pprint(note_occurences)
pickle_it(all_note_occurences_pickle, note_occurences)
def all_scales(notes):
major = [0, 2, 4, 5, 7, 9, 11]
minor = [0, 2, 3, 5, 7, 9, 11]
scales = {}
for key, value in notes.items():
if value['octave'] == 1:
scale_note = value['scale_note']
if scale_note not in scales.keys():
scales[scale_note] = {'major': [], 'minor': []}
scales[scale_note]['major'] = [notes[x+key]['scale_note'] for x in major]
scales[scale_note]['minor'] = [notes[x+key]['scale_note'] for x in minor]
pickle_it(scales_pickle, scales)
pprint(scales)
def all_trichords(notes):
trichords = {}
major = [0, 4, 7]
minor = [0, 3, 7]
sept = [0, 4, 7, 10]
for key, value in notes.items():
if value['octave'] == 1:
scale_note = value['scale_note']
if scale_note not in trichords.keys():
trichords[scale_note] = {'major': [], 'minor': [], 'sept': []}
trichords[scale_note]['major'] = [notes[x+key]['scale_note'] for x in major]
trichords[scale_note]['minor'] = [notes[x+key]['scale_note'] for x in minor]
trichords[scale_note]['sept'] = [notes[x+key]['scale_note'] for x in sept]
pprint(trichords)
pickle_it(trichords_pickle, trichords)
def get_all_piano_frequencies():
url = r'https://en.wikipedia.org/wiki/Piano_key_frequencies'
html_table = get_html_tables(url)[0]
notes = {}
frequencies = []
# open(piano_frequencies_pickle, 'w').close()
rows = html_table.findAll('tr')
for i, html_row in enumerate(rows):
# print(html_row)
cells = html_row.findAll('td')
if cells:
key_nr = int(get_text_from_table_cell(cells[0]))
sci_name = get_text_from_table_cell(cells[2])
frequency = float(get_text_from_table_cell(cells[3]))
frequencies.append(frequency)
sci_name_short = sci_name.replace(' ♯ ', '♯').replace(' ♭ ', '♭')
sci_name_short = sci_name_short.split(' ')[0]
scale_note, octave = split_chars_and_ints(sci_name_short, '[a-zA-Z♯♭]+')
notes[key_nr] = {'frequency': frequency, 'octave': octave, 'scale_note': scale_note}
frequencies = sorted(frequencies)
# pprint(frequencies)
min_frequency = frequencies[0]
frequency_ranges = {}
for i, frequency in enumerate(frequencies[:-1]):
max_frequency = round((frequencies[i+1] +frequencies[i])/2, 2)
frequency_ranges[frequency] = {'min_hz': min_frequency, 'max_hz': max_frequency}
# print(frequency, max_frequency)
min_frequency = max_frequency
frequency_ranges[frequencies[-1]] = {'min_hz': max_frequency, 'max_hz': frequencies[-1]}
# pprint(frequency_ranges)
for key, value in notes.items():
if value['frequency'] in frequency_ranges.keys():
notes[key]['range_hz'] = frequency_ranges[value['frequency']]
pprint(notes)
pickle_it(piano_frequencies_pickle, notes)
