Presonus Audiobox USB – Pulseaudio

The PreSonus USB is a great soundcard. It enhances the listening audio quite a bit because of the 48KHz audiorange. There are 2 audio inputs, Either XLR and 6.3 mm jack, for microphone or musical instrument input.

However since the audiobox uses a 48kHz instead of default 44kHz sampling,this can cause havoc to sound for instance in skype giving nerfed and glitchy sound.

There is a configuration needed to be changed in pulseaudio to accommodate this problem.

In the config file /etc/pulse/daemon.conf

change these lines:

  • default-sample-rate = 44100
  • alternate-sample-rate = 44100


  • default-sample-rate = 48000
  • alternate-sample-rate = 48000

Pro-tip: comment this line out in /etc/pulse/ to prevent volume going up and down on skype events.

  • # load-module module-role-cork