Generate 440Hz sine signal-audio with Python wave library

python_wave_sample.py

import wave, struct, math, random

sampleRate = 44100 # samples/sec (Fs)
duration = 10 # seconds
frequency = 440 # hertz

obj = wave.open('sound.wav','w')
obj.setnchannels(1) # mono
obj.setsampwidth(2) # 16-bit
obj.setframerate(sampleRate)

t_incr = 1.0/sampleRate*duration
t = 0
for j in xrange(0, duration):
	frame = ""
	for i in xrange(0, sampleRate):
		value = 32767*math.sin(6.28*frequency*t)
		frame = frame + struct.pack('<h', value)
		t = t + t_incr
	obj.writeframes(frame) # accepts full frames only
   
obj.close()