diff --git a/src/timeline2/view/qml/ClipAudioThumbs.qml b/src/timeline2/view/qml/ClipAudioThumbs.qml
index db01f61ec..c0be72dab 100644
--- a/src/timeline2/view/qml/ClipAudioThumbs.qml
+++ b/src/timeline2/view/qml/ClipAudioThumbs.qml
@@ -1,63 +1,63 @@
 import QtQuick 2.6
 import QtQuick.Controls 2.2
 import Kdenlive.Controls 1.0
 import QtQml.Models 2.2
 import com.enums 1.0
 
 Row {
     id: waveform
     visible: clipStatus != ClipState.VideoOnly && parentTrack.isAudio && !parentTrack.isMute
     opacity: clipStatus == ClipState.Disabled ? 0.2 : 1
     property int maxWidth: 2000
     property int innerWidth: clipRoot.width - clipRoot.border.width * 2
     anchors.fill: parent
     property int scrollStart: scrollView.flickableItem.contentX - clipRoot.modelStart * timeline.scaleFactor
     property int scrollEnd: scrollStart + scrollView.viewport.width
     property int scrollMin: scrollView.flickableItem.contentX / timeline.scaleFactor
     property int scrollMax: scrollMin + scrollView.viewport.width / timeline.scaleFactor
 
     Timer {
         id: waveTimer
         interval: 5; running: false; repeat: false
         onTriggered: processReload()
     }
 
     onScrollStartChanged: {
         waveTimer.start()
     }
 
     function reload() {
         waveTimer.start()
     }
 
     function processReload() {
         // This is needed to make the model have the correct count.
         // Model as a property expression is not working in all cases.
         if (!waveform.visible || !timeline.showAudioThumbnails || (waveform.scrollMin > clipRoot.modelStart + clipRoot.clipDuration) || (clipRoot.modelStart > waveform.scrollMax) || clipRoot.audioLevels == '') {
             return;
         }
             //var t0 = new Date();
             waveformRepeater.model = Math.ceil(waveform.innerWidth / waveform.maxWidth)
             var firstWaveRepeater = Math.max(0, Math.floor((waveform.scrollMin - clipRoot.modelStart) / (waveform.maxWidth / timeline.scaleFactor)))
             var lastWaveRepeater = Math.min(waveformRepeater.count - 1, firstWaveRepeater + Math.ceil((waveform.scrollMax - waveform.scrollMin) / (waveform.maxWidth / timeline.scaleFactor)))
             for (var i = firstWaveRepeater; i <= lastWaveRepeater; i++) {
                 waveformRepeater.itemAt(i).update()
             }
     }
 
     Repeater {
         id: waveformRepeater
         TimelineWaveform {
             width: Math.min(waveform.innerWidth, waveform.maxWidth)
             height: waveform.height
             channels: clipRoot.audioChannels
             isFirstChunk: index == 0
             showItem: waveform.visible && (index * width) < waveform.scrollEnd && (index * width + width) > waveform.scrollStart
             format: timeline.audioThumbFormat
-            inPoint: Math.round((clipRoot.inPoint + (index * waveform.maxWidth / clipRoot.timeScale)) * clipRoot.speed) * channels
-            outPoint: inPoint + Math.round(width / clipRoot.timeScale * clipRoot.speed) * channels
+            inPoint: Math.round((clipRoot.inPoint + (index * waveform.maxWidth / clipRoot.timeScale)) * Math.abs(clipRoot.speed)) * channels
+            outPoint: inPoint + Math.round(width / clipRoot.timeScale * Math.abs(clipRoot.speed)) * channels
             levels: clipRoot.audioLevels
             fillColor: activePalette.text
         }
     }
 }