Squeezelite on Raspberry Pi 4

Hi,

there are two screens connected to my pi4 plus audio via analog 3.5mm jack

I did install Squeezelite on a Pi4 (Buster) with the apt-get install method.
I switched default audio to card2 "Headphones" with raspi-config and rebooted.
Squeezelite runns after reboot but I cannot hear any sound - even thought I am able to hear sounds from the browser or aplay.


What else can I check?

Thanks!