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import numpy as np
import pyaudio
from requests import get
audio = pyaudio.PyAudio()
stream = audio.open(
format = pyaudio.paInt16,
channels = 1,
rate=200000,
input=True
)
# https://stackoverflow.com/questions/45908268/how-to-know-the-frequency-of-audio-from-microphone
# https://stackoverflow.com/questions/3694918/how-to-extract-frequency-associated-with-fft-values-in-python
playingfreq = 0
lastfreq = 0
while True:
chunk = stream.read(10000)
w = np.fft.fft(list(chunk))[10:200]
f = np.fft.fftfreq(20000)
i = 10+np.argmax(np.abs(w))
mag = abs(w[i-10])
freq = abs(2 * f[i] * 200000)
if mag <= 200000:
freq = 0
print(freq)
if playingfreq != 0 and abs(freq-playingfreq) > 20 and abs(lastfreq-playingfreq) > 20:
# Stop playing
print('Stopping', playingfreq)
get('http://10.242.6.228:5000/stopfreq/' + str(playingfreq))
playingfreq = 0
if freq != 0 and playingfreq == 0 and abs(freq-lastfreq) <= 20:
# Nothing playing and freq matches last freq
print('Starting', freq)
get('http://10.242.6.228:5000/startfreq/' + str(freq))
playingfreq = freq
lastfreq = freq
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