# constants

samplerate = 44100

win_s = 2048

hop_s = win_s // 2

framesize = hop_s

print alsaaudio.cards()

print alsaaudio.mixers()

# set up audio input

recorder = alsaaudio.PCM(type=alsaaudio.PCM_CAPTURE)

#recorder = alsaaudio.PCM(type=PCM_CAPTURE, cardindex=1)

recorder.setperiodsize(framesize)

recorder.setrate(samplerate)

#recorder.setformat(alsaaudio.PCM_FORMAT_FLOAT_LE)

recorder.setchannels(1)

# create aubio pitch detection (first argument is method, "default" is

# "yinfft", can also be "yin", "mcomb", fcomb", "schmitt").

pitcher = aubio.pitch("default", win_s, hop_s, samplerate)

# set output unit (can be 'midi', 'cent', 'Hz', ...)

pitcher.set_unit("Hz")

# ignore frames under this level (dB)

pitcher.set_silence(-40)

print("Starting to listen, press Ctrl+C to stop")

count = 0

# main loop

while True:

# try:

# read data from audio input

_, data = recorder.read()

# convert data to aubio float samples

#samples = np.fromstring(data, dtype=aubio.float_type)

samples = np.fromstring(data, dtype=np.int16)

#print(len(samples),samples.min(),samples.max())

# pitch of current frame

#sample_test = np.hstack((samples,samples))

sample_test = np.array(samples,dtype=np.float32)

freq = pitcher(sample_test)[0]

# compute energy of current block

energy = np.sum(sample_test**2)/len(sample_test)

# do something with the results

if freq > 130 and freq < 200 and energy > 200000:

count = count + 1

if count > 1:

count = 0

people = 1

print("{:10.4f} {:10.4f}".format(freq,energy))

else:

people = 0

# except KeyboardInterrupt:

# print("Ctrl+C pressed, exiting")