As Steven said, I'm sure Bartok's intention was that you hand stop alternate bars. Bartok I'm sure knew enough about the horn to know about hand stopping and the effect that can be achieved with rapid changed between stopped and open notes.
I'm not familiar with the piece, but can you describe exactly how those bars are notated? Do they say "con sord" and "senza sord" or are the notes on alternate bars marked with a + sign? I rather suspect the latter, in which case Bartok's intention is perfectly clear - he intended the notes to be hand stopped. Regards Jonathan West _______________________________________________ post: horn@music.memphis.edu unsubscribe or set options at http://music2.memphis.edu/mailman/options/horn/archive%40jab.org