def _build_plot(self):
from sasha.tools import analysistools
pta = PartialTrackingAnalysis(self)
assert pta.exists
partials = pta.read()
assert len(partials)
figure = analysistools.PartialTracker().plot(partials)
return figure
def _find_chord(self):
pta = PartialTrackingAnalysis(self)
tracks = pta.read()
if not tracks:
message = "Cannot find any partial tracks for {!r}"
message = message.format(self.client.name)
raise Exception(message)
db_threshold = -7
tracks = [_ for _ in tracks if 100 < len(_)]
tracks = sorted(tracks, key=lambda x: x.amplitude_mean, reverse=True)
tracks = [_ for _ in tracks if db_threshold < _.db(tracks[0])]
tracks = tuple(tracks)
semitones = [x.semitones_centroid for x in tracks]
amplitudes = [x.db(tracks[0].amplitude_mean) for x in tracks]
zipped = zip(semitones, amplitudes)
chord_dict = {}
for pair in zipped:
pitch, amplitude = pair
if pitch not in chord_dict:
chord_dict[pitch] = amplitude
elif chord_dict[pitch] < amplitude:
chord_dict[pitch] = amplitude
return tuple(sorted(((k, v) for k, v in chord_dict.iteritems()), key=lambda x: x[0]))
