Finally, now I have a proper setup for sound recording, I made a recording of the kontrabas nyckelharpa. This is “Polska från Hälleforsnäs”, solo at the start and end, but with two other tracks overlaid, thickest in the middle. I think that there it sounds almost like a Breton pipe band – but then it is a drone instrument.
The video has photos of the construction – with one taken at Halsway in September 2017 (thanks Linda Hall) of two kontrabasharpa players – me and Vicki Swan.