I installed the latest version of volumio on a Raspberry Pi Zero W. It starts OK and connects to my wifi network. I select hdmi output but when I try to play a radio station I get “Failed to open audio output” message and no sound from hdmi. I tried adding “hdmi_force_hotplug=1, hdmi_drive=2, and hdmi_force_edid_audio=1” to /boot/config.txt (one at a time), but it didn’t help. Does anyone else have this problem and is there a solution?
One more tantalizing detail: I can hear the opening sound when I reboot.