Binary interpolator for electronic musical instrument
US4205575A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 1978 |
| Grant date | Jun 3, 1980 |
| Priority date | — |
| Expiry date | May 19, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H2250/631
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A binary interpolator circuit is embodied in an electronic musical instrument for producing a relatively smooth, inaudible transition between steps of different amplitude in a stepwise advancing or decreasing waveform, such as an envelope signal for a note from a percussive type instrument or voice such as a piano. The binary interpolator circuit includes a counter circuit for producing a sequence of stepwise changing binary coded signals and a combining circuit for combining the interpolating signals, in the sequence produced, with a binary coded scaling signal corresponding to the amplitude difference between the two points in the stepwise changing waveform between which interpolation is desired. A comparator circuit compares the interpolating signals, in the sequence produced, with the scaling signal and produces an output control signal for indicating whether the binary coded numbers corresponding to the respective interpolating and scaling signal are equal. A control circuit is responsive to this control output signal for respectively allowing or inhibiting the production of the interpolating signals. In a preferred embodiment, multiplexing and demultiplexing circuits are prov…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.