The Pronomos Flute
What does it look like?
Essentially the flute has a standard Boehm open-key system but with three extra full size tone holes, namely upper C# (the one used for the B/C# trill option), a duplicate B hole and a duplicate G hole, both on the outward side. These are covered with a “double cup” mechanism to produce ¼ tones, as are the G# and D# keys. The B key is perforated, so requiring the left hand thumb to cover it for normal playing, while the thumb Bb touch has been moved inwards to allow this. Pressing the usual touch on the B key produces B up (footnote 2). The two C# touches are clustered together with the little C key finger button and fingered with L2. The two keys covering the extra B hole are operated by the right hand thumb,R1, while the two keys covering the extra G hole are worked by L5, alongside the G# key, the G up key and an F# gizmo (footnote 3).
Both the original prototypes had an ordinary C foot. Julian however wanted to continue the idea of key independence using a modified B foot so, without altering the basic Boehm format, we managed to achieve this fairly simply. The foot joint has the normal C/C# clutch but this can be disengaged so that the C key will close independently. There are no less than five gizmos in this area allowing 24 possible combinations, such as D# plus C or B, C# plus B, etc.
2. “ B up ” means a quarter-tone above B.
3. I use the term “gizmo” to describe any unusual extension to an existing key, touch or spatula.