Hello There! Good News!
Sorry that I drop quite late on this pulseaudio issue and HDMI sound. I received my first Api very recently.
Still, the Atomic Pi I received on January 2020 was shipped with a 18.04.1 Bionic Lubuntu.
So you may receive an SBC with this LTS version. In this LTS version,
pulseaudio, the sound server does not work so well with the HDMI sound card, and all the sound delivery may be very unstable.
Then what you read here is probably relevant.
You should as soon as possible download from
and install the fresher 19.04 Disco Lubuntu image on your SBC.
This is because the pulseaudio version which is embedded on the
pulseaudio version 12.2
With this newer version of pulseaudio, every thing works fine.
This is what I can confirm from my installation, and my tests.
I did not the 18.10 Cosmic version.
To upgrade the the LTS Bionic from 18.04.1 to the last LTS subversion18.04.4 do not solve the problem,
because even the last 18.04.4 has yet the buggy pulseaudio version 11.1.
The next LTS version , called
Focal, is to be delivered as
20.04 in two mont hs.
It is announced with a pulseaudio version 13.xxx, that should be
more than okey.
Though, I have no idea whether and when we will get an APi dedicated Lubuntu
Focal image ready to be downloaded and then dumped on the eMMC.
And at this moment , I dont know how to build such APi dedicated system image with all the specific APi drivers and configs. Do You?
Have fun , and more with your wonderful APi!