Technically, there is no "real" difference between a "high" and "low" horn player. They should BOTH be fully capable of playing the entire range of the instrument. However, the "high" players tend to favour that part of their range and are usually considerably more comfortable with the more difficult high notes when in an exposed passage, while the "low" players are likewise, more comfortable in the low end of the range.
Anything that is in the "extreme" high register should be doubled in most cases - either having the horns themselves two to a part, or even four to a part, when it is not already being doubled by other members of the orchestra.
There is no real reason for a 2nd horn part not to cross above the 1st horn part, but it should be motivated by contrapuntal concerns, and not simply arbitrarily "well, why don't I place the 2nd horn above the 1st".
I wouldn't set any "guideline" about what point to split high and low horns.
Simply think of it as follows:
Harmony notes are divided from top to bottom, in order, as horn 1, 3, 2 then 4.
Often times, in 3-part harmony, the 1st horn might not participate so as to give his lips a break for any forthcoming exposed solos.
Otherwise, horn parts in 3-part harmony tend to have 1st and 3rd horns on the uppermost part, then the 2nd and 4th on the next lower notes.
Let me see if I can't put together a few samples of horn parts for you all.
Quote:
Originally Posted by MusicManJ4
Question:
You were talking about Saiming's having reversed 1st and 2nd horn. What if there are only two horns? I only have experience with four. So if there are two, will it be more likely both will be high players, IE. is it safe to write two high parts, or will it usually be one high and one low? ( P.S. I think I would loosely consider written G4 to be the general dividing point between considering low and high horn parts. Would you agree or differ? )
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