Flute Cork (soprano/piccolo flutes)

thingiverse

This is flute headjoint cork for Theobald Böhm flute of soprano range, which closes the headjoint's leftmost end. The cork adjusts the highest octave (6th) notes to tune them properly to the base A frequency 442Hz. Adjusting the cork's position also changes how many octaves the flute can cover. If the octaves are narrower than required, try pushing the cork in. Otherwise pull the cork out of the headjoint to fine-tune the highest notes to their proper frequency. This is a trade-off between how many octaves the flute can play and how precise the high notes are in tune. The normal position for soprano flutes is 17mm from the center of the embouchure hole, while piccolo flutes require 9-11mm from the center of the embouchure hole. Tune the cork so that D sounds sharp in all octaves (D6=2xD5=4xD4). Tune the headjoint slide for each octave's proper frequency. After full tuning (cork+headjoint slide), A4 should equal 442Hz, A5 should equal 884Hz, and A6 should equal 1768Hz. The cork's height is 32mm, with a bottom diameter of 17.6mm and a top diameter of 17.3mm. This fits the coned flute headjoint end perfectly, which has a cone angle of 0.25 degrees. Note that you can only pull the cork from the headjoint after removing the crown and pushing it away to the opposite end (to the middle of the flute). Assemble in reverse order and tune or remember the cork's position with cleaning stick marks on its handle. Updated: - On October 15, 2017, a piccolo metal flute cork model was added. The cork's height is 20mm, with a bottom diameter of 10.8mm and a top diameter of 10.3mm, fitting the coned flute headjoint end perfectly. - A piccolo ABS-metal flute cork model was also added, with a cork height of 15mm and a diameter of 11.4mm for cylindrical metal headjoints.