32bit and 64bit.

Mixbus is a full-featured Digital Audio Workstation (DAW) with True Analog Mixing: a combination of Harrisons world-renowned sound and features in a knob-per-function interface. Mixbus provides a solution for engineers and mixers who need a recorder, editor and mixing system with world-class sound and features.

https://harrisonconsoles.com/site/mixbus.html