diff -urN v6/gui.py v7/gui.py
--- v6/gui.py	2020-01-21 22:56:32.000000000 +0900
+++ v7/gui.py	2020-01-25 01:50:02.000000000 +0900
@@ -1,6 +1,11 @@
 #!/usr/bin/env python
 
+import sys
+import threading
+from decimal import Decimal
 import wx
+import thr
+import io_ut
 import dbg
 
 def wrap( lsts, border=4 ):
@@ -15,6 +20,26 @@
 	return vsz
 
 def init(app, title):
+	rdr = io_ut.reader_new( sys.stdin, 1, no_buf=True )
+
+	lock = threading.Lock()
+
+	def comm(cmd, rep_func=None):
+		lock.acquire()
+		if cmd:
+			dbg.out(cmd)
+		rep = None
+		if rep_func:
+			while rep == None:
+				rep = rep_func()
+				if rep == '':
+					break
+		lock.release()
+		return rep
+
+	while comm('', rdr.readline) != 'ready\n':
+		pass
+
 	frame = wx.Frame(None, wx.ID_ANY, title)
 
 	play_lbs = ( ' Play |>', ' Play <|', 'Pause ||' )
@@ -32,6 +57,29 @@
 	shifts = (2, 1, 0, -1)
 	get_shift = lambda : shifts[ menu_speed.GetSelection() ]
 
+
+	pos = wx.StaticText( frame, wx.ID_ANY,'-' )
+	def pos_update():
+		cmd = 'dbg.out("{}".format( snd.get_sec() ) )'
+		s = comm(cmd, rdr.readline).strip()
+		s = str( Decimal(s).quantize( Decimal('.01') ) )
+		wx.CallAfter( pos.SetLabel, s )
+
+	pos_ev = threading.Event()
+	def th_func():
+		tmout = 0.2 if is_play() else None
+		pos_ev.wait(tmout)
+		pos_ev.clear()
+		pos_update()
+
+	th = thr.loop_new(th_func)
+	def th_stop():
+		th.quit_ev.set()
+		pos_ev.set()
+		th.stop()
+	th.start()
+
+
 	def lb_update():
 		lb = lb_pause if is_play() else play_lbs[ 1 if is_reverse() else 0 ]
 		btn_play.SetLabel(lb)
@@ -43,6 +91,7 @@
 		s = ''
 		if o == btn_play:
 			s = 'snd.{}()'.format( 'start' if is_play() else 'stop' )
+			pos_ev.set()
 		elif o == cbox_reverse:
 			s = 'snd.reverse={}'.format( o.GetValue() )
 		elif o == menu_speed:
@@ -51,13 +100,19 @@
 		if o in (cbox_reverse, menu_speed) and is_play():
 			s = '\n'.join( ( 'snd.stop()', s, 'snd.start()' ) )
 		if s:
-			dbg.out(s)
+			comm(s)
+
+	def quit_hdl(evt):
+		dbg.err('quit')
+		th_stop()
+		wx.Exit()
 
 	frame.Bind( wx.EVT_TOGGLEBUTTON, hdl, btn_play )
 	frame.Bind( wx.EVT_CHECKBOX, hdl, cbox_reverse )
 	frame.Bind( wx.EVT_CHOICE, hdl, menu_speed )
+	frame.Bind( wx.EVT_CLOSE, quit_hdl )
 
-	szr = wrap( [ (btn_play, cbox_reverse, menu_speed) ] )
+	szr = wrap( [ (btn_play, cbox_reverse, menu_speed), (pos,) ] )
 	frame.SetSizer(szr)
 	frame.Layout()
 	frame.Fit()
diff -urN v6/snddiv.py v7/snddiv.py
--- v6/snddiv.py	2020-01-20 21:23:00.000000000 +0900
+++ v7/snddiv.py	2020-01-25 00:53:31.000000000 +0900
@@ -10,9 +10,10 @@
 import empty
 import cmd_ut
 import thr
+import io_ut
 import dbg
 
-readable = lambda fd, tmout=3.0: select.select([fd], [], [], tmout)[0] == [fd]
+silent = False
 
 def data_new(name_mp3):
 
@@ -133,8 +134,7 @@
 		proc = cmd_ut.proc_new(cmd, stdin=PIPE, stdout=PIPE, stderr=PIPE, sudo_pw=sudo_passwd)
 		return proc
 
-	def update():
-		s = e.rbuf
+	def update(s):
 		if not s.startswith('In:'):
 			return
 		lst = s.split()[1:2]
@@ -150,17 +150,12 @@
 		e.sec = sec
 		e.evt.set()
 
-	def rfunc(f):
-		if not ( e.run and readable(f) ):
+	def rfunc(rdr):
+		if not e.run:
 			return
-		c = f.read(1)
-		if not c:
-			return
-		c = c.decode()
-		e.rbuf += c
-		if c in '\n\r':
-			update()
-			e.rbuf = ''
+		s = rdr.readline()		
+		if s:
+			update(s)
 
 	def wfunc(f):
 		try:
@@ -170,7 +165,9 @@
 		f.close()
 
 	proc = proc_new()
-	rth = thr.loop_new( rfunc, ( proc.get_stderr(), ) )
+	f = proc.get_stderr()
+	rdr = io_ut.reader_new(f)
+	rth = thr.loop_new( rfunc, (rdr,) )
 	wth = thr.th_new( wfunc, ( proc.get_stdin(), ) )
 
 	def start():
@@ -252,31 +249,48 @@
 	return empty.to_attr( e, locals() )
 
 def get_args():
+	def get_idx_pop(av, k):
+		if k in av:
+			i = av.index(k)
+			av.pop(i)
+			return i
+		return -1
+
 	av = sys.argv[1:]
 	k = '-S'
 	sudo_passwd = ''
 	try:
-		if k in av:
-			i = av.index(k)
-			av.pop(i)
+		i = get_idx_pop(av, k)
+		if i >= 0:
 			sudo_passwd = av.pop(i)
-		return ( av[0], sudo_passwd )
+		silent = ( get_idx_pop(av, '-silent') >= 0 )
+		return ( av[0], sudo_passwd, silent )
 	except:
-		dbg.err_exit( 'Usage: {} [{} sudo_passwd] filename_mp3'.format( sys.argv[0], k ) )		
+		dbg.err_exit( 'Usage: {} [-S sudo_passwd] [-silent] filename_mp3'.format( sys.argv[0], k ) )		
 
 if __name__ == "__main__":
-	( filename_mp3, sudo_passwd ) = get_args()
+	( filename_mp3, sudo_passwd, silent ) = get_args()
+
+	dbg_out = lambda s, tail='\n': None if silent else dbg.out
 
 	data = data_new(filename_mp3)
-	dbg.out( 'last_sec={}'.format( data.last_sec ) )
+	dbg_out( 'last_sec={}'.format( data.last_sec ) )
 
 	snd = snd_new(data, sudo_passwd)
 
+	rdr = io_ut.reader_new( sys.stdin, 1, no_buf=True )
+
+	if silent:
+		dbg.out('ready')
+
 	while True:
-		dbg.out('snd> ', '')
-		s = sys.stdin.readline()
+		dbg_out('snd> ', '')
+		while True:
+			s = rdr.readline()
+			if s != None:
+				break
 		if not s:
-			dbg.out('')
+			dbg_out('')
 			break
 		exec(s)
 # EOF
diff -urN v6/stdio.sh v7/stdio.sh
--- v6/stdio.sh	1970-01-01 09:00:00.000000000 +0900
+++ v7/stdio.sh	2020-01-25 00:55:00.000000000 +0900
@@ -0,0 +1,10 @@
+#!/bin/bash
+rm -f fifo
+mkfifo fifo
+
+$1 < fifo | $2 | tee fifo
+#$1 < fifo | $2 > fifo
+
+rm -f fifo
+# EOF
+