import os
mpid=os.getpid()

def run(code): return os.popen(code).read()

def sub(code):
	spid=os.fork()
	if os.getpid()!=mpid:
		# son gogogo
		run(code)
	else:
		return spid

spid=sub("aplay muisc.wav")
run("arecord -r 16000 -t wav -d 20 -v out.wav")
run("kill -9 %d"%spid)