SInce v7, Ardour has the sound-on-sound recording mode, so here is a quick explainer for the three modes available

We've just released an updated build of Ardour 8.7 for macOS with a fix for greyed-out menus

Ardour Community

Download Ardour | Ardour Community

We've just released Ardour 8.7 with track dragging, combined rulers, MIDI Scene markers, parallelized disk I/O, Novation Launchkey MK4 support, and a lot of fixes

Ardour 8.12 — What's new | Ardour DAW

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