Apparatus for deriving and replicating complex musical tones
AssigneeAllen Organ Company
InventorsDwight A. Beacham, Robert P. Woron, John T. Whitefield
Life of this patent
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Abstract
An apparatus for achieving the effect of air movement in instruments during replication and sounding of complex musical instruments by separating unstable frequency components, the quasi-periodic components, from stable fundamental and harmonic components, the periodic components, of compound voice waveforms, storing the respective component information pertaining to the quasi-periodic and periodic components in separate memory locations, and recombining the quasi-periodic component with one or more periodic components in appropriate fashion to form and sound the compound voice waveforms.
Claims22
In an electronic musical instrument having a keyboard for allowing the production of sounds corresponding to selected voices at pitches corresponding to respective notes of a musical scale as indicated by depressed keys, apparatus for replicating compound voice waveforms spanning the transient and steady-state portions of the selectable voices comprising:
- means for storing the quasi-periodic component waveforms of the selected voices;
- means for stroing the periodic component waveforms of the selected voices;
- means for generating addresses for selectively causing the reading from the quasi-periodic component storage means, in accordance with the selective actuation of keys and switches for choosing notes and voices, the quasi-periodic component waveform of at least one selected voice;
- means for generating addresses for selectively causing the reading from the periodic component waveform storage means, in accordance with the selective actuation of keys and switches for choosing notes and voices, the periodic component waveform of one or more selected voices;
- means for combining and converting the waveform outputs of the storage means of the quasi-periodic component of at least one selected voice and the waveform outputs of the storage means of the periodic component of one or more selected voices to replicate the compound voice waveform of the one or more selected voices.
In an electronic organ having a keyboard for allowing the production of sounds corresponding to selected voices at pitches corresponding to respective notes of a musical scale as indicated by depressed keys, apparatus for replicating compound voice waveforms spanning the transient and steady-state portions of the selectable voices comprising:
- means for storing the quasi-periodic component waveforms of the selected voices;
- means for storing the periodic component waveforms of the selected voices;
- means for generating addresses for selectively causing the reading from the quasi-periodic component storage means, in accordance with the selective actuation of keys and switches for choosing notes and voices, the quasi-periodic component waveform of at least one selected voice;
- means for generating addresses for selectively causing the reading from the periodic component waveform storage means, in accordance with the selective actuation of keys and switches for choosing notes and voices, the periodic component waveform of one or more selected voices;
- means for combining and converting the waveform outputs of the storage means of the quasi-periodic component of at least one selected voice and the waveform outputs of the storage means of the periodic component of one or more selected voices to replicate the compound voice waveform of the one or more selected voices.
Dependencies are inferred from the claim text.