def TEST1():
""" Returns a 16-bit string audio waveform to test Mary Had a Little Lamb"""
note_names = ["E4", "D4", "C4", "D4", "E4", "E4", "E4", "E4", "D4", "D4", "D4", "D4", "E4", "G4", "G4", "G4"]
chords = [songsmith.Chord(notes=[songsmith.Note(songsmith.nametofreq(name),0.5,16000)]) for name in note_names]
song = songsmith.Phrase(chords)
song.addovertones(5)
return str(song)
def TEST2():
""" Returns a 16-bit string audio waveform to test musical chords"""
song = songsmith.Phrase(chords=[
songsmith.Chord(notes=[
songsmith.Note(songsmith.nametofreq("C4"), 0.5, 8000)
]),
songsmith.Chord(notes=[
songsmith.Note(songsmith.nametofreq("C4"), 0.5, 8000),
songsmith.Note(songsmith.nametofreq("E4"), 0.5, 8000)
]),
songsmith.Chord(notes=[
songsmith.Note(songsmith.nametofreq("C4"), 0.5, 8000),
songsmith.Note(songsmith.nametofreq("E4"), 0.5, 8000),
songsmith.Note(songsmith.nametofreq("G4"), 0.5, 8000)
]),
songsmith.Chord(notes=[
songsmith.Note(songsmith.nametofreq("C4"), 1.5, 8000),
songsmith.Note(songsmith.nametofreq("E4"), 1.5, 8000),
songsmith.Note(songsmith.nametofreq("G4"), 1.5, 8000),
songsmith.Note(songsmith.nametofreq("C5"), 1.5, 8000)
])
])
song.addovertones(5)
return str(song)
def generate(self, length=100):
song = songsmith.Phrase()
lastindices = [[0] for i in range(self.search_depth)]
for i in range(length):
currentindices = []
# Pick the next note
choices = []
for depth, indices in enumerate(lastindices):
for index in indices:
choices.extend(self.patterns[index]["next"][depth])
currentindices.append(random.choice(choices))
# Generate the next chord
c = songsmith.Chord(notes=[])
duration = random.choice(self.patterns[currentindices[0]]["durations"])
for index in currentindices:
freq = 0 if self.patterns[index]["name"] == "" else songsmith.nametofreq(self.patterns[index]["name"] + "4")
amplitude = 0 if self.patterns[index]["name"] == "" else 16000
c.notes.append(songsmith.Note(freq,duration,amplitude))
c.addovertones(5)
# Update the lastindices for the next loop
lastindices.pop()
lastindices.insert(0, currentindices)
song.chords.append(c)
return song
