Sometimes a tune's structure piques my interest and I want to understand more about the mechanics of it as a melody -- how it works.  These articles are the result.  Musical perceptions are often very personal, and these analyses just reflect one person's opinion.

See here for an excellent grounding article on music theory with some very high quality linked articles.  Its discussion of Celtic music applies well to Scandinavian music.  
Polska efter Naktergal Erik Ersson
Polska efter Blecka Anders
 
Vastermarnspolskan efter Byss-Calle
    
 

   
                
Tune Analyses
Overviews
Various scribblings of potential interest...  If by someone else, the authors are indicated.
The Fylgia Lodge, San Francisco, 1/10/2006
The Swedish Nyckelharpa in Its Historic Context
The Dissemination of the Nyckelharpa 
Authors: Gunnar Ternhag & Mathias Boström, 1999
The Orsa style in perspective 
Author: Anders Rosén, 2000