Yep, I see.
Debian image can be installed from a USB flash drive with using serial port to interact with.
Check HQP settings (see tab 1 in attached picture) and try as a Backend - NetworkAudioAdapter IPv6 too.
Sorry, I have no other clues for now. Tomorrow I'll try to install Debian + Botic exactly as described in HOWTO and give feedback.
As a option you may try to write ready image
BBB_Botic.pmf - Google Drive
This will help to understand what the problem is.
Just did that. Nothing changed...Must be something really fishy going on because yesterday morning HQP was able to see botic device until realized that I forgot to install davinci… After that I did 3 times flashing from the same sd card I used before when worked and just 15 min ago flashed emmc from the sd card containing your ready SD image.
Ok Vit. Thanks and goodnight...to be continued...