This guide is written for all owners of a Behringer X32 or Midas M32 with a X-USB 32x32 channel expansion card. It is directed towards splitting the X-USB channels up in virtual outputs on Ubuntu 18.04 with PulseAudio. The guide may also work for other versions or distro's of Linux with PulseAudio.
It is assumed that the X-USB is installed and connected to a computer. And automatically recognized as a multi-channel soundcard by the operating system. Also note that on Ubuntu 18.04, PulseAudio runs on top of ALSA. ALSA picks up the soundcard and PulseAudio then uses the full soundcard through ALSA to create virtual channels.
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