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diff --git a/dgedit/canvastoollisten.cc b/dgedit/canvastoollisten.cc
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            canvastoollisten.cc
+ *
+ *  Fri Jul 29 16:57:48 CEST 2011
+ *  Copyright 2011 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "canvastoollisten.h"
+
+#define BUFSZ 1024
+
+Player::Player(Canvas *c)
+{
+  canvas = c;
+  playing = false;
+  pos = 0;
+
+  ao_initialize();
+
+  ao_sample_format sf;
+  sf.bits = 16;
+  sf.rate = 44100;
+  sf.channels = 1;
+  sf.byte_format = AO_FMT_NATIVE;
+
+  dev = ao_open_live(ao_default_driver_id(), &sf, 0);
+}
+
+Player::~Player()
+{
+  ao_close(dev);
+  ao_shutdown();
+}
+
+void Player::run()
+{
+  while(true) {
+    if(playing) {
+      short s[BUFSZ];
+      for(size_t i = 0; i < BUFSZ; i++) {
+        if(i + pos < canvas->size) s[i] = canvas->data[pos + i] * ((2<<16) - 1);
+        else {
+          s[i] = 0;
+          playing = false;
+        }
+      }
+
+      ao_play(dev, (char*)s, BUFSZ * sizeof(short));
+      canvas->update();
+
+      pos += BUFSZ;
+
+    } else {
+      msleep(100);
+    }
+  }
+}
+
+CanvasToolListen::CanvasToolListen(Canvas *c)
+  : player(c)
+{
+  canvas = c ;
+  player.start();
+}
+
+bool CanvasToolListen::mousePressEvent(QMouseEvent *event)
+{
+  player.pos = canvas->unmapX(event->x());
+  player.playing = true;
+  return true;
+}
+
+bool CanvasToolListen::mouseReleaseEvent(QMouseEvent *event)
+{
+  player.playing = false;
+  return true;
+}
+
+void CanvasToolListen::paintEvent(QPaintEvent *event, QPainter &painter)
+{
+  if(player.playing) {
+    painter.setPen(QColor(0, 127, 127));
+    painter.drawLine(canvas->mapX(player.pos),
+                     event->rect().y(),
+                     canvas->mapX(player.pos),
+                     event->rect().y() + event->rect().height());
+   }
+}