Allen & Heath Qu Series - USB Streaming
Qu mixers feature an integrated audio interface for USB streaming to / from a computer. Qu is Core Audio compliant which means no drivers are required on a Mac -- it is fully plug 'n play.
Windows ASIO drivers are available on the Allen&Heath website and supported on version 1.4 of the Qu firmware or higher.
Patch the sources to be recorded using the Setup / Output Patch / USB Audio menu. Up to 24 channels can be streamed to USB from Qu-16, and up to 32 channels from Qu-24. Select the sources by touching the buttons on screen and scrolling through the options.
Select Qu as the audio device in your DAW and patch the track inputs before recording, and you are ready to go.
Audio can be returned to the mixer and patched to one or multiple input channels. Route the tracks to the required USB outputs, for example 1 for Mono Input channel 1.
Use the Preamp screen Function key to access the source page, make sure you have set USB B Streaming as the global USB source, and select USB for the required channels. For applications such as virtual soundcheck you can set all channels to USB in a matter of seconds.
If you are using iTunes, QuickTime or similar for playback to the mixer, you can change the OS X default routing of the stereo output in the Utilities / Audio MIDI Setup / Audio Devices. Select the Qu mixer and click on Configure Speakers, then assign stereo Left and Right to the required USB output, for example 17&18 to play onto ST1 on Qu-16.