Tone signal generating apparatus for performing a timbre change by storing a full frequency band in a wave memory
US5428183A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1993 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | Dec 17, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S84/09
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A tone signal generating apparatus, including a memory for storing wave data containing frequency components within a full band; a tone generator for reading the wave data from the memory in accordance with key ON/OFF data to generate a tone signal; a velocity generator for generating a velocity value based on key ON/OFF data; a first coefficient processor for producing a first coefficient to control the amplitude in accordance with the velocity value generated by the velocity generator; a first operator for performing an operation on the first coefficient produced by the first coefficient processor and the tone signal generated by the tone generator, a filter for extracting frequency components within a specific band from the tone signal output from the first operator to produce a first tone signal and outputting the first tone signal; a second coefficient processor for producing a second coefficient to control the amplitude in accordance with the velocity value generated by the velocity generator; and a second operator for performing an operation on the second coefficient produced by the second coefficient processor and the tone signal produced by the tone generator to obtain a s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.