def test_can_invert_long_fft(self):
samplerate = SR11025()
rs = resampled(resample_to=samplerate)
@simple_in_memory_settings
class Document(rs):
long_windowed = ArrayWithUnitsFeature(
SlidingWindow,
wscheme=SampleRate(Milliseconds(500), Seconds(1)),
wfunc=OggVorbisWindowingFunc(),
needs=rs.resampled,
store=True)
long_fft = ArrayWithUnitsFeature(FFT,
needs=long_windowed,
store=True)
synth = SineSynthesizer(samplerate)
audio = synth.synthesize(Seconds(2), freqs_in_hz=[440., 880.])
_id = Document.process(meta=audio.encode())
doc = Document(_id)
fft_synth = FFTSynthesizer()
recon = fft_synth.synthesize(doc.long_fft)
self.assertIsInstance(recon, AudioSamples)
self.assertEqual(audio.dimensions, recon.dimensions)
def test_can_apply_sliding_windows_in_succession(self):
samplerate = SR11025()
short_window = samplerate * (16, 512)
long_window = SampleRate(
frequency=short_window.frequency * 1,
duration=short_window.frequency * 64)
rs = resampled(resample_to=samplerate, store_resampled=True)
samples = AudioSamples.silence(samplerate, Seconds(10))
@simple_in_memory_settings
class Sound(rs):
short_windowed = ArrayWithUnitsFeature(
SlidingWindow,
wscheme=short_window,
needs=rs.resampled)
long_windowed = ArrayWithUnitsFeature(
SlidingWindow,
wscheme=long_window,
needs=short_windowed)
_id = Sound.process(meta=samples.encode())
snd = Sound(_id)
self.assertEqual((512,), snd.short_windowed.shape[1:])
self.assertEqual((64, 512), snd.long_windowed.shape[1:])
def setUp(self):
self.samplerate = SR22050()
rs = resampled(resample_to=self.samplerate)
window_size = Picoseconds(int(1e12))
wscheme = SampleRate(window_size, window_size)
@simple_in_memory_settings
class Document(rs):
windowed = ArrayWithUnitsFeature(
SlidingWindow,
wscheme=wscheme,
needs=rs.resampled,
store=False)
dct = ArrayWithUnitsFeature(
DCTIV,
needs=windowed,
store=True)
ss = SineSynthesizer(self.samplerate)
self.audio = ss.synthesize(Seconds(5), [440., 660., 880.])
_id = Document.process(meta=self.audio.encode())
self.doc = Document(_id)
def setUp(self):
self.samplerate = SR44100()
rs = resampled(resample_to=self.samplerate)
wscheme = HalfLapped()
@simple_in_memory_settings
class Document(rs):
windowed = ArrayWithUnitsFeature(
SlidingWindow,
wscheme=wscheme,
wfunc=OggVorbisWindowingFunc(),
needs=rs.resampled,
store=False)
fft = ArrayWithUnitsFeature(
FFT,
needs=windowed,
store=False)
centroid = ArrayWithUnitsFeature(
SpectralCentroid,
needs=fft,
store=True)
ss = SineSynthesizer(self.samplerate)
chunks = \
[ss.synthesize(Seconds(1), [440 * i]) for i in range(1, 6)]
self.audio = \
AudioSamples(ArrayWithUnits.concat(chunks), self.samplerate)
_id = Document.process(meta=self.audio.encode())
self.doc = Document(_id)
def setUp(self):
self.samplerate = SR22050()
rs = resampled(resample_to=self.samplerate)
wscheme = HalfLapped()
@simple_in_memory_settings
class Document(rs):
windowed = ArrayWithUnitsFeature(
SlidingWindow,
wscheme=wscheme,
wfunc=OggVorbisWindowingFunc(),
needs=rs.resampled,
store=False)
fft = ArrayWithUnitsFeature(
FFT,
needs=windowed,
store=False)
flatness = ArrayWithUnitsFeature(
SpectralFlatness,
needs=fft,
store=True)
# create a pure sine wave that fades out
ss = SineSynthesizer(self.samplerate)
sine = ss.synthesize(Seconds(5), [440.])
sine_envelope = np.linspace(1.0, 0.0, len(sine))
sine *= sine_envelope
# create noise
ns = NoiseSynthesizer(self.samplerate)
noise = ns.synthesize(Seconds(5))
noise_envelope = np.linspace(0.0, 1.0, len(noise))
noise *= noise_envelope
# mix the sine wave and noise together
self.audio = sine + noise
_id = Document.process(meta=self.audio.encode())
self.doc = Document(_id)
def test_has_correct_duration(self):
samplerate = SR22050()
rs = resampled(resample_to=samplerate)
@simple_in_memory_settings
class Document(rs):
windowed = ArrayWithUnitsFeature(SlidingWindow,
wscheme=HalfLapped(),
needs=rs.resampled,
store=True)
synth = NoiseSynthesizer(samplerate)
audio = synth.synthesize(Milliseconds(5500))
_id = Document.process(meta=audio.encode())
doc = Document(_id)
orig_seconds = audio.dimensions[0].end / Picoseconds(int(1e12))
new_seconds = doc.windowed.dimensions[0].end / Picoseconds(int(1e12))
self.assertAlmostEqual(orig_seconds, new_seconds, delta=0.01)
def setUp(self):
self.samplerate = SR11025()
rs = resampled(resample_to=self.samplerate)
wscheme = HalfLapped()
@simple_in_memory_settings
class Document(rs):
windowed = ArrayWithUnitsFeature(SlidingWindow,
wscheme=wscheme,
needs=rs.resampled,
store=False)
mdct = ArrayWithUnitsFeature(MDCT, needs=windowed, store=True)
ss = SineSynthesizer(self.samplerate)
self.audio = ss.synthesize(Seconds(5), [440., 660., 880.])
_id = Document.process(meta=self.audio.encode())
self.doc = Document(_id)
def test_can_persist_and_retrieve_with_second_long_windowing_scheme(self):
samplerate = SR22050()
rs = resampled(resample_to=samplerate)
window_size = Seconds(1)
wscheme = SampleRate(window_size, window_size)
@simple_in_memory_settings
class Document(rs):
windowed = ArrayWithUnitsFeature(SlidingWindow,
wscheme=wscheme,
needs=rs.resampled,
store=True)
synth = NoiseSynthesizer(samplerate)
audio = synth.synthesize(Milliseconds(5500))
_id = Document.process(meta=audio.encode())
doc = Document(_id)
self.assertEqual(6, len(doc.windowed))
def test_has_correct_duration(self):
samplerate = SR22050()
rs = resampled(resample_to=samplerate)
@simple_in_memory_settings
class Document(rs):
windowed = ArrayWithUnitsFeature(
SlidingWindow,
wscheme=HalfLapped(),
needs=rs.resampled,
store=True)
synth = NoiseSynthesizer(samplerate)
audio = synth.synthesize(Milliseconds(5500))
_id = Document.process(meta=audio.encode())
doc = Document(_id)
orig_seconds = audio.dimensions[0].end / Picoseconds(int(1e12))
new_seconds = doc.windowed.dimensions[0].end / Picoseconds(int(1e12))
self.assertAlmostEqual(orig_seconds, new_seconds, delta=0.01)
def test_can_persist_and_retrieve_with_second_long_windowing_scheme(self):
samplerate = SR22050()
rs = resampled(resample_to=samplerate)
window_size = Seconds(1)
wscheme = SampleRate(window_size, window_size)
@simple_in_memory_settings
class Document(rs):
windowed = ArrayWithUnitsFeature(
SlidingWindow,
wscheme=wscheme,
needs=rs.resampled,
store=True)
synth = NoiseSynthesizer(samplerate)
audio = synth.synthesize(Milliseconds(5500))
_id = Document.process(meta=audio.encode())
doc = Document(_id)
self.assertEqual(6, len(doc.windowed))
def test_can_apply_sliding_windows_in_succession(self):
samplerate = SR11025()
short_window = samplerate * (16, 512)
long_window = SampleRate(frequency=short_window.frequency * 1,
duration=short_window.frequency * 64)
rs = resampled(resample_to=samplerate, store_resampled=True)
samples = AudioSamples.silence(samplerate, Seconds(10))
@simple_in_memory_settings
class Sound(rs):
short_windowed = ArrayWithUnitsFeature(SlidingWindow,
wscheme=short_window,
needs=rs.resampled)
long_windowed = ArrayWithUnitsFeature(SlidingWindow,
wscheme=long_window,
needs=short_windowed)
_id = Sound.process(meta=samples.encode())
snd = Sound(_id)
self.assertEqual((512, ), snd.short_windowed.shape[1:])
self.assertEqual((64, 512), snd.long_windowed.shape[1:])
def setUp(self):
self.samplerate = SR11025()
rs = resampled(resample_to=self.samplerate)
wscheme = HalfLapped()
@simple_in_memory_settings
class Document(rs):
windowed = ArrayWithUnitsFeature(
SlidingWindow,
wscheme=wscheme,
needs=rs.resampled,
store=False)
mdct = ArrayWithUnitsFeature(
MDCT,
needs=windowed,
store=True)
ss = SineSynthesizer(self.samplerate)
self.audio = ss.synthesize(Seconds(5), [440., 660., 880.])
_id = Document.process(meta=self.audio.encode())
self.doc = Document(_id)
