This may solve the problem - check if QLab is now happy. If the button in the bottom right says “Start” this indicates that DVS is not currently active. Select the network interface that is connected to the sound system. If the Network Interface drop down is blank, DVS is not active. When DVS opens, it will show a window like the one above. If there are the two lights above the network cable at the other end of the lead, then it’s probably not a hardware problem. There should be two lights above the ethernet plug at the other end of the cable indicating the cable is working - there probably won’t be any lights at the computer end of the ethernet cable. Ensure all the cables are properly plugged in by giving them a little push inwards. Ethernet plugs can easily pull out a few millimeters from the socket so they look like they are connected but won’t work. Sometimes your computer will be connected to a network switch (a sort of junction box where lots of networks are connected), or might be connected directly to a mixing desk. Some computers do not, and use either an adaptor or hub to connect your computer to the network. Some computers have a Ethernet network port built in to them. Make sure that your computer is connected correctly. The two steps to diagnose this problem is to check the hardware (that your computer is connected to the network), and to check the software. This connects your computer to the sound system using a piece of software, called Dante Virtual Soundcard (DVS) and a network cable. The most common form of virtual sound card is Dante Virtual Soundcard. (Having it at full can cause the sound to distort) If your system has a “virtual” sound card I normally turn it up to full using the keyboard volume buttons, then turn it down 3 button presses. Make sure the volume is always at the same level whenever you are playing back sound. Skip to the section below “Re-assign QLab to the sound card”īe aware, with some sound cards the volume of everything you play can be adjusted using the volume keys on the top of your keyboard. it is listed in the System Preferences>Sound>Output window, then we know that the cable between the computer and the sound card is working, and that everything hardware wise is probably OK.Īssuming QLab is still displaying the “No audio device” error after you carried out the above troubleshooting steps, QLab might have forgotten it’s patch to the sound card. If your computer can “see” your Soundcard, i.e. Can you see the make/model of your Soundcard listed in this window? If not, then there is a problem with the hardware connection between the computer and the sound card (such as the cable), or the software driver for the sound card is not working properly (and may need to be reinstalled). In the window that appears, click on the Sound icon, then on the Output tab. Try turning the sound card off and back on again.Ĭan your computer “see” the Soundcard? Go to the Apple menu in the very top left of your computer’s display, and select System Preferences from the menu. Make sure the sound card is turned on - are there any LED lights or displays on it that should be illuminated? Some sound cards plug into a mains socket, whilst others get their power from the computer they are attached to. It’s not uncommon, particularly on computer systems that are moved around for the cable to pop out a few millimetres, and it can look like it’s connected but isn’t properly inserted. Make sure the sound card is connected to your computer, and that the cable is fully inserted. It’s ridiculous that this step often fixes 90% of problems! The first step to try whenever there is a problem is to shutdown your computer, turn the power off to the computer and any other devices attached to it, and turn it back on. Relatively simple shows might connect using the headphone output socket of the computer. There are also some forms of “virtual” sound card, such as Dante Virtual Soundcard (DVS), where there isn’t a separate hardware device, but your computer is connected to the sound system using an Ethernet cable. Sound cards (aka audio interfaces) are typically a separate hardware device that are connected to your computer using a USB, Firewire or Thunderbolt cable. The “This cue does not have a valid audio output device”, “No audio device” or “issue with audio output patch” error message indicates to us that QLab can’t find the sound card / audio interface that it was using to send sound out of the computer to the sound system.
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