There is no Pi zero w selection when adding a device under the balena sound application. Tried to use the same image as the PI4 B ( using that as the master) and it does not boot at all.
Pi Zero is a different device to RPi 4, so I don’t see how that would work. Pi Zero is potentially not supported, so you’ll need to get a supported device (any one of that list), but I’m curious – Pi Zero doesn’t have audio I/O, how do you plan to use it with balenaSound?
I was under the impression it could be used as a client according to the device support list. Audio out thru the hdmi output into a receiver.
Yes, HDMI output is supported.