“We are pleased to announce the release of Ardour 9.0. This is a major release for the project, seeing several substantive new features that users have asked for over a long period of time. Region FX, clip recording, a touch-sensitive GUI, pianoroll windows, clip editing and more, not to mention dozens of bug fixes, new MIDI binding maps, improved GUI performance on macOS (for most) …”

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A thousand thanks! I don’t know why it was on by default, I find it quite annoying.