Music – Instruments
Patent
1979-04-25
1980-11-04
Truhe, J. V.
Music
Instruments
84 101, G10H 102
Patent
active
042312787
ABSTRACT:
In a musical instrument having one or more tone generators in which a plurality of data words corresponding to the amplitudes of a corresponding number of evenly spaced reference points defining the waveform of one cycle of an audio signal are transferred sequentially from a note register to a digital-to-analog converter in repetitive cycles at a rate proportional to the pitch of the tone being generated, apparatus is provided for adaptively computing the set of data points in response to values of preselected harmonic coefficients. The computation apparatus advances past all harmonic coefficients of smaller magnitude than a selected threshold thereby reducing the computation time and making the instrument capable of responding to time varying tonal changes.
REFERENCES:
patent: 4085644 (1978-04-01), Deutsch et al.
Deutsch Ralph
Isen Forester W.
Kawai Musical Instrument Mfg. Co. Ltd.
Truhe J. V.
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