Ardour is a hard disk recorder and digital audio workstation application. It runs on Linux, OS X and FreeBSD. Its primary author is Paul Davis, who is also responsible for the JACK Audio Connection Kit. Ardour's intention is to provide digital audio workstation software suitable for professional use.

Released under the terms of the GNU General Public License (version two or any later version), Ardour is free software. People who download via the ardour.org website are asked to pay for downloading Ardour. Without paying, users can still download the full source code and the full version for GNU/Linux, but the OSX binary comes without the ability to load or save AU plugin settings.

Ardour 3.0, with support for MIDI and many other significant new capabilities, was released in March, 2013.