def setUp(self):
self.fs = 1000
self.dur = 2.0
self.f0 = 100
self.x = Sinetone(f0=self.f0, fs=self.fs, duration=self.dur, gaindb=-10)
print(self.id())
print('Before:\n%s' %self.x)
def test_center_frequency(self):
fs = 48000
f0 = 997
x = Sinetone(f0=f0, fs=fs, duration=2, gaindb=20)
print(x)
freq, mag = x.fft(window="rectangular")
self.assertAlmostEqual(freq[mag.argmax()], f0, places=7)
def test_endpoint(self):
fs = 100
f0 = 1
x = Sinetone(f0=f0, fs=fs, duration=1, gaindb=20)
print(x)
print(x.samples[-5:,:])
# We've created a one period sine. The last sample should not be
# very close to zero. If it were, then a concatenation of two
# sines would mean that we have one zero value too many at the
# concatenation point --> discontinuity
self.assertNotAlmostEqual(float(x.samples[-1]), 0, places=5)
class Test_SetSampleRate(unittest.TestCase):
def setUp(self):
self.fs = 1000
self.dur = 2.0
self.f0 = 100
self.x = Sinetone(f0=self.f0,
fs=self.fs,
duration=self.dur,
gaindb=-10)
print(self.id())
print('Before:\n%s' % self.x)
def test_duration_fs_up_2_5(self):
self.assertAlmostEqual(self.x.duration, self.dur, places=5)
self.x.set_sample_rate(self.fs * 2.5)
print('After:\n%s' % self.x)
self.assertAlmostEqual(self.x.duration, self.dur / 2.5, places=5)
def test_duration_fs_down_2_5(self):
self.assertAlmostEqual(self.x.duration, self.dur, places=5)
self.x.set_sample_rate(self.fs / 2.5)
print('After:\n%s' % self.x)
self.assertAlmostEqual(self.x.duration, self.dur * 2.5, places=5)
def test_frequency_fs_down_3(self):
self.assertAlmostEqual(self.x.f0, self.f0, places=5)
self.x.set_sample_rate(self.fs / 3)
print('After:\n%s' % self.x)
self.assertAlmostEqual(self.x.f0, self.f0 / 3, places=5)
def test_frequency_fs_up_3(self):
self.assertAlmostEqual(self.x.f0, self.f0, places=5)
self.x.set_sample_rate(self.fs * 3)
print('After:\n%s' % self.x)
self.assertAlmostEqual(self.x.f0, self.f0 * 3, places=5)