The first mixer is unique to each cue, and can be found in the Audio Levels tab of the inspector for Audio and Mic cues, or in the Audio Levels tab of the inspector for Video cues. From there, audio in QLab is routed using two matrix mixers. If you need a playback engine for music tracks or sound effects and you have a Mac, then it’s absolutely worth looking at.Audio in QLab can originate from an audio file, the audio track within a video file, or a live input on an audio device connected to your Mac.Used from Broadway to Britains West End, QLab software is the tool of choice for many of the worlds most prominent sound, projection, and integrated media. 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. Versatile and user-oriented show control. In its simplest form, therefore, audio in QLab traces the following path:QLab is a streamlined and intuitive macOS application that provides the required tools and features to create complex designs that can bring your audio and video content to life.There are no “main” outputs, no fixed-send busses, and no limitations on which inputs can go to which outputs.In QLab, every cue that can deal with audio (that’s the Audio cue, the Mic cue, the Video cue, and the Fade cue) has its own matrix mixer in which the rows represent either channels in the audio file, channels of audio embedded in a video file, or live inputs on an audio device. What makes it a matrix mixer is that every input can route into every output with just such a volume knob. If you imagine that each crosspoint is actually a volume knob which allows you to set the level of the input as it flows into the output, like an auxiliary send knob, then what you have is a matrix mixer. The point at which each row intersects with each column is referred to as a crosspoint. The rows represent inputs to the mixer, and the columns represent outputs from the mixer.By default, these are routed on a one-to-one basis cue output 1 routes to device output 1, cue output 2 to device output 2, and so on. Instead, they use one of eight output patches, which are eight more individual matrix mixers that bridge the connection from cue output to actual physical outputs.Each Audio, Mic, or Video cue can be assigned to one Audio Patch, and each Audio Patch contains a matrix mixer in which incoming audio from the cues’ cue outputs are the rows, and actual outputs of the assigned audio device are the columns. Cue Outputs and Device OutputsCue outputs do not connect directly to the headphone jack or plugs on your audio interface.
![]() The Mac, in turn, tells QLab. Device manufacturers are responsible for creating the software drivers for their devices, which tell the Mac about the outputs and other capabilities of the hardware. The World Beyond QLabIn the most technical sense, what QLab knows as the device outputs are not necessarily the actual outputs of the audio device. Qlab Audio Full Picture IsOther audio interfaces use other software controls, but the principle is the same. These volume controls come “after” QLab, and therefore behave as an ultimate arbiter of the overall output volume. By and large, any devices we’ve seen that do things like this are well designed and documented, so all that’s needed to get the full picture is to read the manual for your audio interface and make sure you understand what’s what.If the audio interface has a software control panel or virtual mixer interface, that control panel or mixer acts as a final post-QLab set of controls for the hardware.The simplest example of this is the headphone jack on your Mac, which has volume controls on the keyboard and in the menu bar.
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