Volumio 4 and AMP2 = No sound

Hi all,

I decided to move my old Volumio 3 on Volumio 4.
Seamless upgrade.
But…
No sound when playing.
I have an AMP2 which is well recognized by Volumio.
Qobuz plays perfectly.
Loudspeakers are set and connexion is good.
But still no sound. (I have the soundlevel at max :wink: )

Any idea?
.B