Ardour

Ardour is the open-source answer to Pro Tools: a full digital audio workstation for recording, editing, mixing and mastering, built by Paul Davis and a community of contributors since 2000. It runs on Linux, macOS and Windows, the current release is 9.8 (August 2026), and the source code is published under the GPL-2.0. One thing needs saying up front, because it confuses everyone: the source is free, but the official ready-to-run binaries are paid - a subscription (from $1/month) or a one-time payment is what funds development. A free demo build exists and periodically goes silent for a few seconds after ten minutes of use, and building from source costs nothing but time. (The size shown on this page, 84.8MB, is the official Windows demo build 9.8.271 from Ardour's nightly channel, not the stable 9.8 installer - the project does not publish that figure.)

Under the hood, Ardour is a serious recording machine. It records unlimited audio and MIDI tracks with 32-bit floating-point processing throughout, and everything you do to a clip is non-destructive: layered takes, crossfades, gain curves and unlimited undo mean the original files stay untouched. The mixer offers inline plugin slots, sends, mix groups and true any-to-any routing between tracks, buses and hardware.

Plugin support covers LV2, VST3, AudioUnit on macOS and LADSPA, and audio backends include JACK and ALSA on Linux, CoreAudio on macOS and ASIO on Windows. A video timeline with frame-accurate sync makes it a real option for soundtrack and post-production work, which is where its timecode tools shine.

Version 9.8, released in August 2026, takes the first steps into musical scale support, brings back robust data recovery after a crash or power cut during recording, and improves clip recording, on top of the usual batch of fixes. The project ships several releases a year, and release notes are famously thorough.

The honest limits: Ardour is built by recording engineers, and it shows - the interface rewards study and punishes casual clicking. It ships with no bundled instrument library to speak of, so your first session needs plugins you already own. MIDI editing, much improved, is still not the reason people choose it. And the paid-binary model means "free" here means the code, the demo, or your distro's package - not the download button on ardour.org.

For bands tracking live sessions, engineers mixing on Linux, or anyone who wants a DAW they can read, patch and keep forever, Ardour remains the open-source flagship.