I flashed the latest downloadable image hifiberryos-20200424-pi3.img. I tried 2 separate flash disks. I also downloaded it twice.
The initial flash is successful.
The Pi3B+ is connected via Ethernet.
I can start with the web based config by accessing hifiberry.local from my PC.
While going through the 1st config steps the system becomes unresponsive and after a few seconds I cannot access the system any longer and then I hear a "scratch" noise on the speakers. This repeats at regular intervals, and I cannot access the system during that time.
When I re-boot the system (power off and on again) it immediately starts with the "scratch" intervals without any access to the portal.
I used the same Pi in the past with HiFiBerry OS with success.