diff --git a/io/config.cpp b/io/config.cpp
index 8dcac0e3c..8163d43fe 100644
--- a/io/config.cpp
+++ b/io/config.cpp
@@ -15,7 +15,8 @@ Config::Config()
       edit_tool_selects_links(false),
       edit_tool_also_seeks(false),
       select_also_seeks(false),
-      paste_seeks(true)
+	  paste_seeks(true),
+	  rectified_waveforms(false)
 {
 
 }
@@ -52,7 +53,9 @@ void Config::load(QString path) {
                 } else if (stream.name() == "ImageSequenceFormats") {
                     stream.readNext();
                     img_seq_formats = stream.text().toString();
-                }
+				} else if (stream.name() == "RectifiedWaveforms") {
+					rectified_waveforms = (stream.text() == "1");
+				}
             }
         }
         if (stream.hasError()) {
@@ -106,6 +109,7 @@ void Config::save(QString path) {
     stream.writeTextElement("SelectAlsoSeeks", QString::number(select_also_seeks));
     stream.writeTextElement("PasteSeeks", QString::number(paste_seeks));
     stream.writeTextElement("ImageSequenceFormats", img_seq_formats);
+	stream.writeTextElement("RectifiedWaveforms", QString::number(rectified_waveforms));
 
     stream.writeEndElement();
     stream.writeEndDocument(); // doc
diff --git a/io/config.h b/io/config.h
index c2b6efcf5..9742d4f64 100644
--- a/io/config.h
+++ b/io/config.h
@@ -15,6 +15,7 @@ struct Config {
     bool select_also_seeks;
     bool paste_seeks;
     QString img_seq_formats;
+	bool rectified_waveforms;
 
     void load(QString path);
     void save(QString path);
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 1a50c7aec..ee2c011e6 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -558,6 +558,7 @@ void MainWindow::toolMenu_About_To_Be_Shown() {
     ui->actionSeek_to_the_End_of_Pastes->setChecked(config.paste_seeks);
     ui->actionToggle_Snapping->setChecked(panel_timeline->snapping);
     ui->actionScroll_Wheel_Zooms->setChecked(config.scroll_zooms);
+	ui->actionRectified_Waveforms->setChecked(config.rectified_waveforms);
 }
 
 void MainWindow::on_actionEdit_Tool_Selects_Links_triggered() {
@@ -688,3 +689,9 @@ void MainWindow::on_actionTimeline_Track_Lines_triggered()
     config.show_track_lines = !config.show_track_lines;
     panel_timeline->redraw_all_clips(false);
 }
+
+void MainWindow::on_actionRectified_Waveforms_triggered()
+{
+	config.rectified_waveforms = !config.rectified_waveforms;
+	panel_timeline->redraw_all_clips(false);
+}
diff --git a/mainwindow.h b/mainwindow.h
index 2df090ffa..bd1b48422 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -168,6 +168,8 @@ private slots:
 
     void on_actionTimeline_Track_Lines_triggered();
 
+	void on_actionRectified_Waveforms_triggered();
+
 private:
 	Ui::MainWindow *ui;
 	void setup_layout();
diff --git a/mainwindow.ui b/mainwindow.ui
index 01eceb3b9..37f108ab9 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -149,6 +149,7 @@
     <addaction name="actionEdit_Tool_Selects_Links"/>
     <addaction name="actionSeek_to_the_End_of_Pastes"/>
     <addaction name="actionScroll_Wheel_Zooms"/>
+    <addaction name="actionRectified_Waveforms"/>
     <addaction name="separator"/>
     <addaction name="actionPreferences"/>
     <addaction name="actionCrash"/>
@@ -681,6 +682,14 @@
     <string>Ripple Delete In/Out</string>
    </property>
   </action>
+  <action name="actionRectified_Waveforms">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>Rectified Waveforms</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <resources>
diff --git a/panels/viewer.cpp b/panels/viewer.cpp
index 10964939f..807138027 100644
--- a/panels/viewer.cpp
+++ b/panels/viewer.cpp
@@ -142,6 +142,8 @@ void Viewer::update_sequence() {
         update_end_timecode();
     }
 
+	viewer_widget->repaint();
+
     update();
 }
 
diff --git a/ui/timelinewidget.cpp b/ui/timelinewidget.cpp
index b660b47e7..a035f5285 100644
--- a/ui/timelinewidget.cpp
+++ b/ui/timelinewidget.cpp
@@ -807,7 +807,7 @@ void TimelineWidget::update_ghosts(QPoint& mouse_pos) {
         if (g.clip != -1) c = sequence->get_clip(g.clip);
 
 		MediaStream* ms = NULL;
-		if (c->media_type == MEDIA_TYPE_FOOTAGE) {
+		if (g.clip != -1 && c->media_type == MEDIA_TYPE_FOOTAGE) {
 			ms = static_cast<Media*>(c->media)->get_stream_from_file_index(c->media_stream);
 		}
 
@@ -1575,13 +1575,15 @@ void TimelineWidget::redraw_clips() {
                                 clip_painter.drawImage(thumb_rect, ms->video_preview);
                             }
 						} else if (clip_rect.height() > TRACK_MIN_HEIGHT) {
-                            int divider = ms->audio_channels*2;
+							clip_painter.setPen(QColor(80, 80, 80));
 
-                            clip_painter.setPen(QColor(80, 80, 80));
-                            int channel_height = clip_rect.height()/ms->audio_channels;
+							int divider = ms->audio_channels*2;
+							int channel_height = clip_rect.height()/ms->audio_channels;
 
 							for (int i=0;i<waveform_limit;i++) {
-                                int waveform_index = qFloor((((clip->clip_in + ((double) i/panel_timeline->zoom))/media_length) * ms->audio_preview.size())/divider)*divider;
+								int waveform_index = qFloor((((clip->clip_in + ((double) i/panel_timeline->zoom))/media_length) * ms->audio_preview.size())/divider)*divider;
+
+								int rectified_height = 0;
 
 								for (int j=0;j<ms->audio_channels;j++) {
 									int mid = clip_rect.top()+channel_height*j+(channel_height/2);
@@ -1589,7 +1591,16 @@ void TimelineWidget::redraw_clips() {
 
 									qint8 min = (double)ms->audio_preview.at(offset) / 128.0 * (channel_height/2);
 									qint8 max = (double)ms->audio_preview.at(offset+1) / 128.0 * (channel_height/2);
-									clip_painter.drawLine(clip_rect.left()+i, mid+min, clip_rect.left()+i, mid+max);
+
+									if (config.rectified_waveforms)  {
+										rectified_height += (max - min);
+									} else {
+										clip_painter.drawLine(clip_rect.left()+i, mid+min, clip_rect.left()+i, mid+max);
+									}
+								}
+
+								if (config.rectified_waveforms) {
+									clip_painter.drawLine(clip_rect.left()+i, clip_rect.height(), clip_rect.left()+i, clip_rect.height() - rectified_height);
 								}
 							}
                         }