The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 21, 1978
Filed:
Nov. 08, 1976
Robert A Finch, Palos Park, IL (US);
Other;
Abstract
In an electronic musical instrument, such as an electronic organ, the speech characteristics of Vox Humana and similar reed organ pipes are simulated by applying a repeating series of pulse groups separated from each other, which groups each contain a short sequence of two or more pulses, to a sharp cutoff low-pass filter for converting the series of pulse groups into a sound producing signal simulative of the sound signal produced by a Vox Humana or similar organ pipe. The repeating series of pulse groups is obtained by nonlinearly combining square wave tone signals from two or more different octaves of a conventional phase-locked tone generator. The synthesized repeating series of pulse groups, one series for each note of the instrument, are applied to a single low-pass filter, or grouped and applied to a small number of filters.