19 lines
828 B
Python
19 lines
828 B
Python
from math import sin, pi
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import numpy as np
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class ToneGen():
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def __init__(self, pygame, freq_l, freq_r, duration=1):
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n_samples = int(round(duration*44100))
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#setup our numpy array to handle 16 bit ints, which is what we set our mixer to expect with "bits" up above
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buf = np.zeros((n_samples, 2), dtype = np.int16)
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max_sample = 2**(16 - 1) - 1
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for s in range(n_samples):
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t = float(s)/44100 # time in seconds
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#grab the x-coordinate of the sine wave at a given time, while constraining the sample to what our mixer is set to with "bits"
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buf[s][0] = int(round(max_sample*sin(2*pi*freq_l*t))) # left
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buf[s][1] = int(round(max_sample*0.5*sin(2*pi*freq_r*t))) # right
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pygame.sndarray.make_sound(buf).play()
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