Ardour 7.4 Open-Source DAW Released with Support for MIDI Subgroup Busses by from on 2023-04-27 23:30 (#6B6WD) Ardour 7.4 open-source, free, and cross-platform digital audio workstation (DAW) software is now available for download as another update in the Ardour 7.x series that brings some new features, improvements, and lots of bug fixes.