Music – Accessories – Tuning devices
Patent
1996-06-14
1998-02-17
Gellner, Michael L.
Music
Accessories
Tuning devices
G10G 702
Patent
active
057193436
ABSTRACT:
Methods and apparatus determine tuning frequencies for an instrument, such as a piano, by sounding at least three musical notes of the instrument. The sounded notes are recorded and digitally filtered to generate directly partial ladders representative of the sounded notes. The partial ladders are equalized with respective to a reference frequency or one another to determine tuning frequencies for the sounded notes. Tuning frequencies for the remaining notes of the instrument are then determined from the equalized partial ladders. Tone generators which produce the musical notes, such as strings on a piano, are then adjusted to conform the musical notes which they generate to the tuning frequencies. Preferably, the tone generators are adjusted using a display which provides highly accurate macro and micro tuning information in a single display by graphically and dynamically displaying pitch differences of the musical notes generated by the tone generators relative to pitches of the tuning frequencies. Reference to the display facilitates adjustment of the tone generators to make the pitch differences substantially zero. Automatically note switching is preferably performed as is pitch raise tuning using a table of pitch raise overpull percentages for the musical notes of an instrument to be tuned.
REFERENCES:
patent: 3968719 (1976-07-01), Sanderson
patent: 3982184 (1976-09-01), Sanderson
patent: 4014242 (1977-03-01), Sanderson
patent: 5285711 (1994-02-01), Sanderson
James Coleman, RTT, article from Piano Technicians Journal entitled "The Ideal Aural Tuning, Part I: The Introduction", May 1991, p. 28.
James Coleman, RTT, article from Piano Technicians Journal entitled "The Ideal Aural Tuning, Part II" Jun. 1991, pp. 33-34.
James Coleman, Sr., RTT, article from Piano Technicians Journal entitled "The Ideal Aural Tuning, Part III", Jul. 1991, pp. 29-32.
James Coleman, Sr., RTT, article from Piano Technicians Journal entitled "The Ideal Aural Tuning, Part IV", Aug. 1991, pp. 18-21.
David Merrill, article from Piano Technicians Journal entitled "The Puzzles of Inharmonicity" Nov. 1980, pp. 23-24.
Rick Baldassin, RTT, Tuning Editor, article from Piano Technicians Journal entitled "Negative Inharmonicity", Jan., 1991, pp. 18-20.
Steve Fairchild, class handout regarding tuning calculations, PTG Convention, Apr. 1989.
Steve Fairchild, class handout regarding tuning calculations, PTG 1990 Convention.
Gellner Michael L.
Hsieh Shih-yung
Reyburn Piano Service, Inc.
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