Very generous of you to share, and I look forward to listening! (My high-school girlfriend was the daughter of a Latvian immigrant, so I have a soft spot for your country's culture....)
Bandcamp allows vendors to sell multichannel music, but they don't make it easy--which is to say, your customers won't be able to download directly from Bandcamp in the same way that they would with stereo FLACs or mp3s. How it typically works is that Bandcamp collects the money from the sale, then you email the customer and provide them with a download link to your own cloud storage.
Another option might be ImmersiveAudioAlbum.com.
@Kaspars Barbals: I just wanted to let you know that I've only found time to listen to the first six tracks so far--at a good loud volume, anyway--and I
really like the music. I had no idea that bagpipes--
dūdas--played such a big role in Latvian music. They sound so much like the uilleann pipes, and the record reminded me almost immediately of the Irish band Moving Hearts. I hope that's not an inappropriate comparison. Great blend of folk, rock, jazz, and world influences.
The mix is quite good, I think. On some tracks (#1 and #5, for instance), the rear channels are quite subtle, but on others they're much more active. I especially love the drums and percussion on Track #2, for example. I don't hear much from the overheads, at least not on my 5.1.2 system, but that's fine; I'm sure they're adding space and "lift" to the overall mix.
Anyway: wonderful stuff, and thank you again for sharing. Tidal subscribers should definitely check this out, especially if you're already a fan of Baltic music--or even Celtic music or just "world" music in general. And Kaspars, I hope you find a way to distribute paid downloads.
[Edit: finished listening to the entire album. Great musicianship, compelling music, snappy arrangements, and professional mixes. Lots of QQ members would enjoy this.]