Other methods use continuous frequency shifting (a very small amount) to prevent frequency build up and feedback before it happens. femto- Prefix for one thousandth of one trillionth (10), abbreviated f.Fender, Clarence Leonidas "Leo" (1909-1991) American inventor and entrepreneur who founded the Fender Electric Instrument Company in 1946 and invented the legendary Stratocaster and Telecaster guitars.
fall time A voice in a register higher than a person's usual register, resulting from a change in the way the vocal cords are vibrated. An animated Spanish or Spanish-American dance in triple time.
It may be equipped with any of the available systems for the left-hand manual.
In comparison with a piano keyboard, the keys are more rounded, smaller, and lighter to the touch.
These go vertically down the side, pointing inward, toward the bellows, making them accessible to only one hand while handling the accordion.
Another source claimed the first piano accordion was introduced in 1854 at the Allegemeine Deutsche Industrieausstellung in Munich.