sys.path.append('../..')
import numpy as np
from tuning import pitch_to_freq
from synthesis import sine, generate_and_save
def complex_tone(partials):
# partial = ((freq0, amp0), (freq1, amp1), ...)
return lambda t: np.sum(sine(t, freq=freq, amplitude=amp) for (freq, amp) in partials)
def dissonance(base, difference):
'''Returns the timbre composed of two sines of unit amplitude.'''
return ((base, 1), (base + difference, 1))
def uniform_random(size, a, b):
return a + (b - a) * np.random.random(size)
if __name__ == '__main__':
numpy.random.seed(42)
log_diff_range = (-1, 4)
sample_count = 100
log_diffs = uniform_random(sample_count, *log_diff_range)
base = 440
for log_diff in log_diffs:
diff = 10 ** log_diff
generate_and_save(complex_tone(dissonance(base, diff)),
filename="%s_%s.wav" % (base, diff), duration=3)
from scipy.signal import chirp
from analysis import split_to_blocks
from synthesis import generate_and_save
from reassignment import compute_spectra
block_size = 2048
fs = 44100
f1, f2 = 440, 880
duration = block_size / fs
times, x = generate_and_save(lambda t: chirp(t, f1, duration, f2),
duration=duration,
fade_ends=False)
x_blocks = split_to_blocks(x, block_size, block_size)
X, X_cross_time, X_cross_freq, X_inst_freqs, X_group_delays = compute_spectra(
x_blocks[0], w)
idx = (X_inst_freqs >= f1 / fs) & (X_inst_freqs <= f2 / fs)
plt.scatter(X_group_delays[idx],
X_inst_freqs[idx],
alpha=0.5,
s=abs(X)[idx],
c=abs(X)[idx])
from scipy.signal import chirp
from analysis import split_to_blocks
from synthesis import generate_and_save
from reassignment import compute_spectra
block_size = 2048
fs = 44100
f1, f2 = 440, 880
duration = block_size / fs
times, x = generate_and_save(lambda t: chirp(t, f1, duration, f2),
duration=duration, fade_ends=False)
x_blocks = split_to_blocks(x, block_size, block_size)
X, X_cross_time, X_cross_freq, X_inst_freqs, X_group_delays = compute_spectra(x_blocks[0], w)
idx = (X_inst_freqs >= f1 / fs) & (X_inst_freqs <= f2 / fs)
plt.scatter(X_group_delays[idx], X_inst_freqs[idx], alpha=0.5, s=abs(X)[idx], c=abs(X)[idx])
def generate_and_play(func, filename='test.wav', **kwargs):
t, samples = generate_and_save(func, filename, **kwargs)
play(filename)
return t, samples
def complex_tone(partials):
# partial = ((freq0, amp0), (freq1, amp1), ...)
return lambda t: np.sum(
sine(t, freq=freq, amplitude=amp) for (freq, amp) in partials)
def dissonance(base, difference):
'''Returns the timbre composed of two sines of unit amplitude.'''
return ((base, 1), (base + difference, 1))
def uniform_random(size, a, b):
return a + (b - a) * np.random.random(size)
if __name__ == '__main__':
numpy.random.seed(42)
log_diff_range = (-1, 4)
sample_count = 100
log_diffs = uniform_random(sample_count, *log_diff_range)
base = 440
for log_diff in log_diffs:
diff = 10**log_diff
generate_and_save(complex_tone(dissonance(base, diff)),
filename="%s_%s.wav" % (base, diff),
duration=3)
