Create a gist now

Instantly share code, notes, and snippets.

Embed
What would you like to do?
ドレミファソラシドをならす
#!/usr/bin/env python
import wave
import struct
import numpy as np
from pylab import *
def createSinWave (A, f0, fs, length):
"""振幅A,基本周波数f0, サンプリング周波数fs,長さlength秒の正弦波を作成して返す"""
data = []
for n in arange(length * fs):
s = A * np.sin(2 * np.pi * f0 * n / fs)
if s > 1.0: s = 1.0
if s < -1.0: s = -1.0
data.append(s)
data = [int(x * 32767.0) for x in data]
data = struct.pack("h" * len(data), *data)
# list に * をつけると引数展開? されるらしい
return data
def play(data, fs, bit):
import pyaudio
p = pyaudio.PyAudio()
stream = p.open(format=pyaudio.paInt16,
channels=1,
rate=int(fs),
output=True)
chunk = 1024
sp = 0
buffer = data[sp:sp+chunk]
while buffer != b'':
stream.write(buffer)
sp = sp + chunk
buffer = data[sp:sp+chunk]
stream.close()
p.terminate()
if __name__ == "__main__" :
freqList = [262, 294, 330, 349, 392, 440, 494, 523]
for f in freqList:
data = createSinWave(1.0, f, 8000.0, 2.0)
play(data, 8000, 16)
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment