Here’s how to get Ardour set up so that the DAW can control a MIDI synthesizer. I’m using Ubuntu Studio, Ubuntu 20.04.1 LTS, Ardour 5.12.0.
- Start Jack (I use QjackCtl).
- In a terminal, type
a2jmidid -j default
a2jmidid is a bridge between the ALSA MIDI system and JACK.
- Start Qsynth (a front-end to the fluidsynth MIDI synthesizer) and make sure a soundfont is loaded.
- In the QjackCtl MIDI connections tab, connect the Output Port ‘midi_out’ of the MIDI track in Ardour to the Input Port a2j ‘FLUID Synth’.
- In QjackCtl Audio tab, make sure that the qsynth left and right channels are connected either to a system audio output (for listening) or to an Ardour audio track (for recording).