#only keep the most recent 50 samples of data
plotbuffer = plotbuffer[-50:]
#calculate the spectrum
spectrum = np.fft.rfft(plotbuffer)
# absolute value
spectrum2 = m * np.absolute(spectrum) / len(spectrum)
#plot spectrum
qtPanningPlot2.addData(spectrum2)
#########################################################################
#main programme
# open comedi
c.open()
#set digital outputs low to start
c.digital_out(2, 0)
c.digital_out(3, 0)
#print user interaction
print("Violin Tuner")
print("Type note to tune: G, D, A or E")
frequency = input()
#set variables based on user input
if frequency == 'G':
frequency = 196
m = 10**107
th = 1
#!/usr/bin/python3
import pyusbdux as dux
dux.open()
# Warning: no sampling rate defined here.
# It's as fast as possible just for testing.
while True:
print(dux.digital_in(0))