I'm testing out the Orange Pi 3 Ubuntu 18.04 image (Link: https://www.armbian.com/orange-pi-3/), and I'm trying to play some sound using a USB adapter (Link: https://www.amazon.co.uk/gp/product/B000R5NJD8/).
I originally posted this as a question on Ask Ubuntu (link: https://askubuntu.com/questions/1163369/sound-only-1-speaker-is-working), but I was advised to file a bug report about the issue.
I'm acutely aware that this post belongs in the Allwinner H6 forum (Link: https://forum.armbian.com/forum/18-allwinner-h6/), but it would appear that there are restrictions in place to prevent me from posting there.
It works...... but only through the left speaker. If I do this:
speaker-test --test wav --channels 2
...I hear "front right" out of the front-left speaker, and I do not hear "front left" at all. If I instead test just 1 channel:
speaker-test --test wav --channels 1
...then I hear "front left" out of the front-left speaker.
The same goes for if I play some music with `aplay`:
I ran the `alsa-info` program, and got this link, which contains a bunch of useful information: https://alsa-project.org/db/?f=39d0b2d680cd04a510e0bc0615d7ba771f4b29d2
I've checked the levels in `alsamixer` already: https://i.stack.imgur.com/N7U0f.png (Link to screenshot of the terminal)
Additionally, I checked the USB adapter in question on another (also Ubuntu) machine (that has a GUI) (`alsa-info` link: https://alsa-project.org/db/?f=2f7f9550539333685966e7fd35ace8524281ba40). Both channels worked flawlessly as intended.
I do have PulseAudio installed, but playing through that yields the exact same problem.
Does anyone know what's gone wrong? I'd very much like to listen to things through both speakers.