You can set application-wide preferences for QLab by choosing QLab Preferences… from the Apple menu. These preferences apply to all workspaces on your Mac, and they do not transfer with workspaces copied or moved to other Macs.
You can choose amongst five behaviors for QLab when it’s launched:
When this box is checked, QLab will attempt to connect to the internet and check for available updates. If an update is available, QLab will ask you if you’d like to download and install it. Updates are never automatically downloaded. If no internet connection is available, QLab simply tries again on the next launch. No error message appears.
At present, this checkbox does absolutely nothing. Over time, we plan to add various measures of QLab’s behavior which will help us track and solve problems. As we add these measures, we will list exactly what data is sent right here. We will never include personally identifiable data, media files, or other information proprietary to your designs.
When this box is checked, entering Show Mode disables the following OS-level features which could potentially cause trouble during a performance:
QLab defaults to a buffer size of 512 samples for each audio device. You can manually adjust buffer sizes here. Smaller buffers reduce latency but may cause choppy playback, particularly with audio effects such as reverb and echo. Larger buffers increase latency but can smooth out choppiness, particularly on less powerful computers.
You can choose a specific network interface through which QLab will send Art-Net messages, or you can leave the default Automatic setting to have QLab negotiate the correct interface on its own.
Automatic is the best choice most of the time. The main reason you might need to change this is if you are using QLab in a complex networking situation, in which two or more network interfaces are connected to different networks, but the networks use the same IP addressing scheme. If none of this makes sense to you, leave it on Automatic and everything will be fine.
If you are using a USB DMX device, always leave this set to Automatic.
Check this box to use Art-Net’s broadcast mode which allows QLab to communicate with Art-Net nodes that do not support polling.
Also check this box to allow QLab to properly communicate with other software which also uses Art-Net running on the same computer.
Un-checking this box will reduce the amount of network traffic generated by QLab while using Light cues.
QLab logs messages to the Mac at four possible levels. Level 0 provides minimal informational logging only, and Level 3 provides the most logging possible. Level 3 logging records enough data that it can interfere with smooth playback. We recommend using log level 0 unless you are actively troubleshooting a problem.
Still have a question?
Our support team is always happy to help.