no music

I have a PI 4B with a DAC ALLO BOSS and the 7" touchscreen
however it does not produce any music. The player starts and everything looks fine but no music on the output.
What is even stranger is that sometimes I succeed in getting some music by changing the player mode to DSD (DoP) and mixing mode to software + switching I2S DAC to off and then on + restarting the Pi… But after some time the musics stops although the player continues to work.
I am getting crazy with this !!! I tried all the different combinations but nothing works…

Please remove the touchscreen & it’s plugin, and then try if your system works ok with the DAC.