I have Armbian on OrangePi One. It is connected to the TV via HDMI, and has a USB card with headphones connected. I installed LXDE on it via tasksel and found that only one audio device in the mixer is visible in software at a time: either hdmi if the USB card is disabled, or headphones otherwise. Is it possible to teach a microcomputer, like a desktop computer, to see multiple audio devices at the same time?