Volumio not working on Raspberry Pi 4 rev 1.5 board - start4.elf not compatible

Just an aditional question to other PI4/2GB v1.5 owners: Do you also experience bad USB behaviour? My USB DAC/Headphone amp (at the moment Qudelix 5k) is full of noise and hissing, almost like playing bad vinyl. Havent had this issues with it when using my old PI2…