generate_middle_c

#!/bin/bash
""":"
# Run a pulseaudio wrapper. Fancy ugly hack.
exec padsp -d python3 "$0" "$@"
"""

import struct
import numpy
from scipy import signal

sampling_rate_hz = 8000
freq_hz = 261.63 
sample_count = 8000

sample_positions = numpy.arange(sample_count)

sinewave = 100 * numpy.sin(2*numpy.pi * freq_hz * sample_positions / sampling_rate_hz)

# squarewave = 100 * signal.square(2*numpy.pi * freq_hz * sample_positions / sampling_rate_hz)  # square wave
# y = 100 * signal.square(2*numpy.pi * freq_hz * sample_positions / sampling_rate_hz, duty = 0.8)  # square wave with Duty Cycle
# y = 100 * signal.sawtooth(2*numpy.pi * freq_hz * sample_positions / sampling_rate_hz)  # Sawtooth wave


with open('/dev/dsp','wb') as dsp:
    while True:
        for each_value in sinewave:
            dsp.write(struct.pack('b', int(round(each_value))))