def test_save_mono_from_file(mono_sound, tmp_path):
filename = tmp_path / "save_mono_from_file.wav"
mono_sound.save(filename)
assert filename.exists()
resulting_sound = Sound.from_file(filename.as_posix())
assert np.array_equal(resulting_sound.data, mono_sound.data)
def test_save_mono_from_function(tmp_path):
fps, frequency, volume = (44100, 110, 0.5)
amplitude = np.iinfo(np.int16).max * volume
def time_to_frame(t):
return (np.sin(frequency * 2 * np.pi * t) * amplitude).astype(np.int16)
mono_sound = Sound.from_datatimes(time_to_frame,
fps=fps).with_duration(0.5)
filename = tmp_path / "save_mono_from_function.wav"
mono_sound.save(filename)
assert filename.exists()
resulting_sound = Sound.from_file(filename)
assert np.array_equal(resulting_sound.data, mono_sound.data)
def test_from_file_stereo(stereo_filepath):
sound = Sound.from_file(stereo_filepath)
assert sound.n_frames == 55216
assert sound.n_bytes == 2
assert sound.n_bits == 16
assert sound.fps == 44100
assert sound.n_channels == 2
assert sound.dtype is np.int16
assert sound.time_to_frame is None
assert sound.filename == stereo_filepath.encode("utf-8")
assert isinstance(sound.f, snd.PySndfile)
assert isinstance(sound.metadata, dict)
assert sound.metadata["SF_STR_TITLE"] == b"Bass Drum 1"
assert sound.metadata["SF_STR_ARTIST"] == b"freewavesamples.com"
assert sound.metadata["SF_STR_DATE"] == b"2015"
def test_from_file_mono(mono_filepath):
sound = Sound.from_file(mono_filepath)
assert sound.n_frames == 106022
assert sound.n_bytes == 2
assert sound.n_bits == 16
assert sound.fps == 44100
assert sound.n_channels == 1
assert sound.dtype is np.int16
assert sound.time_to_frame is None
assert sound.filename == mono_filepath.encode("utf-8")
assert isinstance(sound.f, snd.PySndfile)
assert isinstance(sound.metadata, dict)
assert sound.metadata["SF_STR_SOFTWARE"] == (
b"Adobe Soundbooth CS5 (XMPDocOpsTemporal:2008.08.26)")
assert sound.metadata["SF_STR_ARTIST"] == b"freewavesamples.com"
assert sound.metadata["SF_STR_DATE"] == b"2015-05-06T19:28:12-07:00"
def test_save_stereo_from_function(tmp_path):
fps, frequencies, volume = (44100, (110, 440), 0.5)
amplitude = np.iinfo(np.int16).max * volume
time_to_frame_left = lambda t: (np.sin(frequencies[0] * 2 * np.pi * t) *
amplitude).astype(np.int16)
time_to_frame_right = lambda t: (np.sin(frequencies[1] * 2 * np.pi * t) *
amplitude).astype(np.int16)
stereo_sound = Sound.from_datatimes(
lambda t: [time_to_frame_left(t),
time_to_frame_right(t)], fps=fps).with_duration(0.5)
filename = tmp_path / "save_stereo_from_function.wav"
stereo_sound.save(filename)
assert filename.exists()
resulting_sound = Sound.from_file(filename)
assert np.array_equal(resulting_sound.data, stereo_sound.data)
def stereo_sound(stereo_filepath):
return Sound.from_file(stereo_filepath)
def mono_sound(mono_filepath):
return Sound.from_file(mono_filepath)