How do i record and invert a sound wave in real time using Tkinter, tkSnack and wave modules?

[Karthik]

Hi,
I want to record a sound wave from a mic and at the same time invert
it and play the inverted wave.My code goes as follows, however nothing
is written into the E:\inverted.wav file.Thanks in advance for any
help.

from Tkinter import *
root = Tk()
import tkSnack
tkSnack.initializeSnack(root)
t=tkSnack
import wave
import audioop
a=audioop
w=wave
import threading
import os
def fin():

		s=t.Sound(file='E:/final.wav')
		s.frequency=44100
		s.record()    #Start recording
		def invert():
			global f,i,as
			f=w.open("E:\\final.wav","r")
			frame=f.readframes(1)
			i=w.open("E:\\inverted.wav","w")
			#sw=f.getsampwidth()
			i.setsampwidth(2)
			#nf=f.getnframes()
			i.setnframes(30*50000)
			#nc=f.getnchannels()
			i.setnchannels(1)
			#fr=f.getframerate()
			i.setframerate(44100)
			f.setpos(220500)
			c=0
			while frame:
                                #invert and write it to inverted.wav
				i.writeframesraw(audioop.mul(frame,2,-1.0))
                                c=c+1
				frame=f.readframes(1)
				if c==100:
					as=t.Sound(load='E:/inverted.wav')
					as.play()


		def stp():
			s.stop()
			as.stop()
			f.close()
			i.close()

		k=threading.Timer(30.0000,stp) #Stop recording after 30 sec
		k.start()
		j=threading.Timer(5.00000,invert) #Start reading recorded file
		j.start()                                      #after 5sec

fin()