QLab 4.0.7 – Create media sequences for live shows.

QLab 4.0.7

QLab is a streamlined and intuitive Mac OS X application that provides the required tools and features to create complex designs that can bring your audio and video content to life.

Versatile and user-oriented show control

QLab’s user-oriented interface helps you design and handle your multimedia content from within a smooth-running and personalizeable workspace that allows you to manage audio, video, MIDI, OCS and more.

QLab comes with numerous building blocks, also known as “cues”, that can help you design your stunning multimedia performance with just a few mouse clicks. Once you dragged and dropped your files you can start adding commands to fade in and fade out the volume, animate videoclips and apply various video and audio effects.

User-definable scripts and numerous video and audio effects

After getting familiar with the basics, you can step up your game and become a power user by using complex features like scripting, multi-projector edge blending, video corner pinning and audio localization. What is more, you can build multi-computer designs and send commands to multiple QLab systems connected to the same local network.

When you are happy with your Cue List, you can give it a try and hit the “Go” button to preview your show. Thanks to the Warnings panel you can check your list and view all encountered issues.

Support for Blackmagic device input, as well as various types of video surfaces and a host of other similarly powerful tools

QLab comes with support for 48 output and 24 input audio channels, intuitive audio waveform editing, customizable playback rate with pitch adjustment, video and audio faders, animation tools, Matrix mixer, audio and video effects, Syphon integration, keystone correction and corner pinning.

You can also overlay titles, use live video input from various devices, including Blackmagic devices, handle multiple video surfaces, apply fade curves, slice files, use markers and use external video effects.

What’s New

Version 4.0.7:

  • More information about pre-wait and post-wait times in the active cue rows
  • When fading over OSC float values, QLab will now send out 6 decimal places for each value rather than 3
  • Timecode cues now display the start time for the default cue name
  • A "video fade mode" AppleScript property used to set the absolute/relative fade mode in the Geometry tab of Fade cues
  • Tinted background for the levels tab when "Assign Gangs" is enabled, to make it more clear when that mode is turned on
  • Hotkey triggers that use numeric keypad keystrokes are now distinguished in the Inspector with the prefix "NUM"
  • A crash that occurred when selecting "Music" in the macOS file chooser dialog
  • A crash that can occur when receiving incoming timecode
  • Several memory leaks during video playback
  • You can again add a slice prior to the last existing slice in the audio waveform
  • Stopping a Fade cue will no longer leave it in a state where it shows the time it stopped as its new duration
  • A bug that could cause new Light cues created from the dashboard to have commands listed in the wrong order, and thus produce incorrect output
  • A bug that could corrupt the lighting commands in a light cue when they were deleted using the GUI (e.g., the pressing the X to delete a light command slider)
  • Setting the MIDI trigger status type on a cue via AppleScript will no longer lead to a crash
  • Text field changes are now committed when toggling the "Assign Gangs" button in the Fade cue inspector
  • Fading OSC values using floating point values will now work in locations where a comma (,) is used as the decimal mark
  • Fixed bugs and clarified behavior around renting a 1-day license at the end of a calendar day


OS X 10.10 or later, 64-bit processor


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