Curling Type: The tone holes are raised from the body material. Their rims are then curled to form the edges of the tone holes. Flutes with the curling type tone holes have a bright sound and allows players to play both legato and light and bouncy passages.
Soldered Type: The tone holes are thicker than the body pipe and are soldered on the body, which increases resistance and delivers a heavier and deeper sound than the curling type.
Undercut Type: The tone holes are the same as the soldered type, except they are also undercut using techniques specific to Yamaha flutes. This technique results in a broader sound.
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