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- no actually as I mentioned, I have the same issue with the official raspbian jackctl package where the alsa button is not greyed out
- also, it's a sound card, so I am talking about audio ( for midi devices, I used a2jmidid)

is there a way to list jack recognized devices ?

qjackctl lists no audio output devices but sees only alsa midi devices (and a2j devices in the midi section)

https://i.imgur.com/mvX1tun.png