Flute Cork (soprano/piccolo flutes)

thingiverse

This is flute headjoint cork for Theobald Böhm flute of soprano range, which closes headjoint leftmost end. The cork is used to change the highest octave (6th) notes of the flute to tune them properly to the base A frequency A4=442Hz. The position of the cork also changes how much octaves the flute can cover. If the octaves are narrower that required (a bit more than 3 octaves) try to push the cork in. Otherwise pull the cork a bit out of headjoint to fine tune the highest notes to proper frequency. So this is trade of how much octaves the flute can play, and how precise the high notes in tune. Normal position for soprano flute is 17mm from the center of the embouchure hole. Normal position for piccolo flute is 9-11mm from the center of the embouchure hole. Tune the cork so that D in all octaves is in tune (D6=2xD5=4xD4). Tune the headjoint slide for proper frequency of each octave. After full tune (cork+headjoint slide) A4=442Hz, A5=884Hz, A6=1768Hz. The cork height is 32mm. Bottom diam is 17,6mm, top diam is 17,3mm, which should best fit the coned flute headjoint end having cone angle of 0,25 angle degrees. Note that cork can be pulled from headjoint only after crown is taken off, and pushed away to the opposite end (to the middle of flute). Assembly is done in reverse order. Then tuning is required, or you can remember the position of the cork with a cleaning stick marks on its handle. Updated: - 10/15/2017 - add piccolo metal flute cork model. Cork height is 20mm, bottom diam is 10,8mm, top diam is 10,3mm , which should best fit the coned flute headjoint end. Add piccolo ABS-metal flute cork model. Cork height is 15mm, diam is 11,4mm for cylindrical metal headjoint.