No this refers to the letter B which may be round (as FA) or square (as MI). The two symbols have become are flat sign and sharp (and natural) sign. Even today the Germans refer to our B-flat as B (round B) and our B natural as H (square B). Hence the use of the letters B-A-C-H to make a musical theme in The Art of Fugue. I guess that's the "good news" of Guido's hexachord. UT RE MI FA SOL LA
>>>the (perhaps historically documentable) claim that "Martin Luther took bar songs and used them for hymns".
>>>But this actually refers to musical notation: the use of bar lines to mark regular measures.
IMHO (depending on who said it), this has nothing to do with either tavern music or measure lines. Bar is the German term for a musical form AAB (Stollen Stollen Abgesang), a common musical form that embraced virtually the entire repertory of the Meistersingers, as well as the French ballade and the Italian 14th-century madrigal. Luther's "Ein feste Burg" is in this form, as are a great many Chorales (hymn melodies) used by Lutherans.
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Warren Steel mu...@olemiss.edu
Professor of Music Emeritus University of Mississippi
http://home.olemiss.edu/~mudws/