I'm not sure how successful they will be with a recorder. 3D printed woodwinds tend to be problematic due to the precision of the hole placement and size required to make the instrument in tune with itself. Pretty much all 3D printed woodwinds either don't work acceptably well or have to be hand tuned after printing, and that's with particularly precise 3D printing equipment that most people won't have access to.
Stringed instruments are different because each string is regularly tuned individually as part of the normal function of the instrument. Woodwinds generally have a set relationship between the existing fingerings with only an all or none approach to varying the tuning.
Of course, these people have a musical background, so it seems like they must be taking this into account. I'm still curious as to how they plan to get acceptable results for a recorder.
I too use Vanilla Music Player when I use Android for music much of the time. The other non-specialty open source player that I've used (other than an open source version of the default player, Music) is Apollo, which is good.
Another open source player that I tried but didn't like as well is andLess (though I can't remember why; it may have been crashy on my device). Open source players I have yet to try include Kure Music Player, Pretty Good Music Player, SicMu Player, and Timber (still in beta).
VLC, which I use for movies a lot also plays music of course. There are also open source specialty players related to Internet streaming, playing from DLNA/UPNP servers, and playing from MPD servers (you can install a server and a player to use them as a solution for local music on your device if you wish).
I'm not sure how successful they will be with a recorder. 3D printed woodwinds tend to be problematic due to the precision of the hole placement and size required to make the instrument in tune with itself. Pretty much all 3D printed woodwinds either don't work acceptably well or have to be hand tuned after printing, and that's with particularly precise 3D printing equipment that most people won't have access to.
Stringed instruments are different because each string is regularly tuned individually as part of the normal function of the instrument. Woodwinds generally have a set relationship between the existing fingerings with only an all or none approach to varying the tuning.
Of course, these people have a musical background, so it seems like they must be taking this into account. I'm still curious as to how they plan to get acceptable results for a recorder.