def volume_control(VOLUME_CHANGE_TIME,level_per_second):
	for vol in range(0,VOLUME_CHANGE_TIME):
		subprocess.call(['nircmd','changesysvolume',str(level_per_second)])
		sleep(1)
def play_audio(REPEATS,FILENAME):
	for r in range(REPEATS):
		p=subprocess.Popen(["ffplay", "-nodisp", "-autoexit", FILENAME])
		print "start audio"
		p.communicate()

if __name__ == "__main__":
        pool.apply_async(play_audio,args=[REPEATS,FILENAME])
	pool = multiprocessing.Pool(2, init_worker)
	try:
		pool.apply_async(volume_control,args=[VOLUME_CHANGE_TIME,level_per_second])
		pool.apply_async(play_audio,args=[REPEATS,FILENAME])
		pool.close()
		pool.join()
	except KeyboardInterrupt:
		print "Caught KeyboardInterrupt, terminating workers"
		pool.terminate()
		pool.close()
		pool.join()

def preexec(): # Don't forward signals.
    os.setpgrp()

def preexec_function():
    signal.signal(signal.SIGINT, signal.SIG_IGN)
my_process = subprocess.Popen(
    ["my_executable"],
    preexec_fn = preexec_function
)