Knowledgebase: Qu Series
Troubleshooting issues with the Qu USB B interface
Posted by Alex Skinner, Last modified by Keith Johnson on 25 July 2018 01:29 PM

Issue: Qu not recognised as an audio device in Windows.

Answer: Install Qu ASIO/WDM driver -
Download the driver here

Issue: Signal sent from the computer to the Qu is not received.

Answer: Check the source for your input channels is setup USB and the global USB source is set to USB B Streaming -
Select a channel and press the processing key. View the preamp block and press the Fn key to view the Source page. Highlight the input channels you would like to assign to USB and select USB from the menu. In the bottom left of this screen, you can press the Global USB Source to toggle between Qu-Drive and USB B Streaming.

Issue: Noise over playback and/or recording audio streams.

Answer: Make sure you are on the latest firmware and your computer is optimised for real time audio streaming -
Download the latest firmware from our website here

To check how your computer is currently handling real time audio streaming, you can try using freeware analysis software such as DPC Latency Checker or LatencyMon. These will help identify if there are any devices or drivers installed on your computer conflicting with the audio stream. Some processes are vital to the running of your system and can’t be disabled, but some examples are:

  • WIFI adapters: disable WIFI
  • Antivirus/firewall software: turn off internet and disable software

Optimise your Windows power settings for real time audio streaming by following these steps:

  • Create a power plan in 'Settings' > 'Power & Sleep' > 'Additional power settings'
  • Select a High-Performance power plan and then ‘Next' > 'Create’
  • On the plan you’ve just made, go to 'Change plan settings' > 'Change advance power settings'
  • Expand USB Settings and USB selective suspend setting and change to ‘Disabled’
Always connect your Qu directly to your computer, not through a hub, and unplug any other USB devices you are not using.

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