Musical sound waveform generator and a method for generating a musical sound waveform electronic musical instrument with improved capability for simulating an actual musical instrument
US5268528A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 27, 1992 |
| Grant date | Dec 7, 1993 |
| Priority date | — |
| Expiry date | Aug 27, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S84/27
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A musical sound waveform generator includes a carrier signal generating unit, a modulation signal generating unit, a mixing controlling unit and a waveform outputting unit. The characteristics of the carrier signal from the carrier signal generating unit are determined such that the musical sound waveform generated by the waveform outputting unit is a sine wave or a cosine wave with a single frequency, where the mixing ratio of the modulation signal is made O by the mixing controlling unit. Therefore, the mixing controlling unit presets the mixing ratio of the modulation signal to be O, making it possible to generate a musical sound waveform which is only a sine wave or a cosine wave of a single frequency. During the performance, the mixing ratio can, for example, be determined at a high value immediately after the start of sound generation and thereafter reduced to near O with time. Thereby, the frequency characteristics of the musical sound waveform can be controlled such that the musical sound waveform is changed from one having a lot of higher harmonics to one having only a single sine wave component or a single cosine wave component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.