So, came across 'Hurv' tunes - Emelie Waldken explains: 

"A hurv is a type of tune (mostly polska) which has one low-pitched and "rock" part, repetitive, a bit like a riff, and one higher-pitched part, more "delicate" or at least more melodic.  Hurvs are found mostly in the border-area between Sweden and Norway, notably Särna in Älvdalen region." 

Here's a 'Hurv' she composed - that I MUST learn!  It's not only cross-tuned, but also tuned down!  "Tuning C# F# C# G# (or DGDA at kindof A=415 Hz)"! 

Ensamhurven (Alone polska) - in baroque tuning

Here's another 'Hurv' I like - by Mats Berglund, Göran Håkansson, Fredrik Lundberg & Anders Nordlöf. 

Hurv efter Bork Julius

Here's quite a different take on a 'Hurv' from the Denmark duo, "Jærv". 

Hurv - by Jærv

...more hidden gems. 😊

- Emily