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This is a list of the fundamental frequencies in hertz (cycles per second) of the keys of a modern 88-key standard or 108-key extended piano in twelve-tone equal temperament, with the 49th key, the fifth A (called A 4), tuned to 440 Hz (referred to as A440). [1] [2] Every octave is made of twelve steps called semitones.
On the other hand, the piano keyboard has only twelve physical note-controlling devices per octave, making it poorly suited to any tunings other than 12 ET. Almost all of the historic problems with the meantone temperament are caused by the attempt to map meantone's infinite number of notes per octave to a finite number of piano keys.
A man tuning an upright piano. Piano tuning is the process of adjusting the tension of the strings of an acoustic piano so that the musical intervals between strings are in tune. The meaning of the term 'in tune', in the context of piano tuning, is not simply a particular fixed set of pitches. Fine piano tuning requires an assessment of the ...
Little Einsteins is an American animated children's television series developed by Douglas Wood and based on the Baby Einstein line of videos. Produced by The Baby Einstein Company (at the time owned by Disney) and animated by Curious Pictures, it marked the Baby Einstein Company's first project for preschoolers. [1]
Baby Einstein, stylized as baby einstein, is an American franchise and line of multimedia products, including home video programs, CDs, books, flash cards, toys, and baby gear that specialize in interactive activities for infants and toddlers under three years old, created by Julie Aigner-Clark. The franchise is produced by The Baby Einstein ...
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Kids 2, Inc., doing business online as Kids2, is an American infant and toddler toy and product manufacturer based in Atlanta, Georgia. [1] [2] [dead link ] The company designs, manufactures and markets Bright Starts, Baby Einstein, and Ingenuity brand products.