pythonのwaveモジュールを用いて，waveファイルの情報抽出，読み込みを行う．なお，1行目のfrom __future__ import divisionは整数と整数を小数で出力するおまじない．
from __future__ import division
import wave
from pylab import *
from numpy import *
def printWaveInfo(wf):
print "Number of channels: ", wf.getnchannels()
print "Sampel width: ", wf.getsampwidth()
print "Sampling frequency: ", wf.getframerate()
print "Number of frames: ", wf.getnframes()
print "Parameters: ", wf.getparams()
def wavread(wf):
buffer = wf.readframes(wf.getnframes())
data = frombuffer(buffer, dtype="int16")
return data
if __name__ == '__main__':
wf = wave.open("./wave/guitar_A4.wav", "r")
printWaveInfo(wf)
x = arange(wf.getnframes())
y = wavread(wf)
fs = wf.getframerate()
x = x / fs
plot(x, y)
xlabel("Time [sec]", fontsize = 20, fontname = 'serif')
ylabel("Amplitude", fontsize = 20, fontname = 'serif')
xticks(fontsize = 16)
yticks(fontsize = 16)
show()
