I am new to Volumio and had everything working until I tried to use the HifiBerry Digi+ Pro (Which I chose because it is in the I2S list of devices) in order to use spdif coaxial out to my DAC, my hardware and software are as follows:

Raspberry Pi4 8GB
Hifi Berry Digi+ Pro
Schiit Modius DAC (which does work as a USB device with Volumio 3)
Volumio 3.251

System was working fine until I added the HifiBerry, then I got the Alsa error, I looked around the forums here and tried the fixes suggested.

I tried turning off I2S and choosing the headphone out and then rebooting the system and then turning I2S back on and selecting the HifiBerry Digi+ Pro from the list, still got the error.

I tried choosing some different HifiBerry devices from the list and also the Generic I2S device, some of those would not give the error but did not pass sound.

After all this, I did send my log, at least one post in the forums said that some I2S devices are having problems under Volumio 3 and it is hopefully being worked on.

I tried to install the last version of Volumio 2 on a different micro sd card but could not find the IP address using Fing or see the Wifi hotspot to complete the setup, either my image was bad (although it did seem to install properly twice) or there is something different about the installation process instructions that I was not able to find.

So this is where I’m at, I’ll continue to use my DAC as a USB device and hope there is and update to 3.251 that then allows me to use the HifiBerry Digi+ Pro unless someone here can suggest something I haven’t tried, thanks!