Author: javier garcia m
Date: 2003-03-28 19:38
I'm not an oboist, but clarinetist, only I love wind instruments. Sure, this will be better explain by oboists.
Esentially, oboes have three "octave" mechanism. The first is half hole for left hand first finger, for C#, D and Eb, then, a key for left thumb, for E, F, F#, G and G#, finally a key for left hand first finger (its position is similar as for the G# throat key for clarinets). This is the conservatory model or half automatic. This key close the hole that the thumb key opens, and open the upper hole.
There is the full automatic model, where the former mechanism, between the two "octave" holes, is controled by the rising of the third left hand finger. So, in this case, you don't have to press the side key to open the upper hole.
On the pictures, you can see oboes with or without this side key.
About the desireability, I guess the full automatic is very difficult to hold in adjust. The half automatic involve more motion for your L.H. first finger.
I hope an oboist can explain better this last point
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