User interface for the control of an audio spectrum filter processor
First Claim
1. A filter user interface control apparatus comprising:
- five keys including a central key and four keys arranged radially around the central key and defining first and second pairs of opposing keys for controlling two or more parameters of a filter;
the first pair of opposing keys for changing a first parameter of a filter;
the second pair of opposing keys for changing a second parameter of the filter; and
the central key and each of the radial keys for operating simultaneously to alter the rate of change of the one of the parameters of the filter.
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Abstract
A user interface control apparatus is disclosed for the control of electronic filter parameters of audio spectrum equalizers, crossovers, and other filter processors. The user interface apparatus comprises five pushbutton keys arranged in a specific cross-shaped pattern. This single arrangement of control keys provides a common user interface control apparatus which can be used to control one or more filter types. Depression of particular keys, or particular combinations of keys can be made to electronically control multiple filter parameters, some simultaneously, and for different filter types depending on the filter type for which the invention is applied. The unique arrangement of the invention'"'"'s pushbutton keys facilitates an intuitive operation of the various parameters for bell, notch, shelf, and pass-band audio filter types with a minimal number of control elements and minimal control area. The filter parameters of a bell filter that can be controlled include center frequency, amplitude, and bandwidth. The filter parameters of a notch filter that can be controlled include center frequency and bandwidth. The filter parameters of a shelf filter that can be controlled include transition frequency, shelf amplitude, and transition slope. The filter parameters of a pass-band filter that can be controlled include corner frequency, pass-band amplitude, and filter slope. Additionally, the unique arrangement of keys facilitates intuitive control of some filter parameters at two rates of continuous change. Also, the user interface allows control of a graphic equalizer, where the selection of a particular bell filter, or “band”, can be scanned at two different rates. Finally, the user interface allows the control of the corner frequencies of two adjacent pass-band filters simultaneously, such as in a crossover processor, so as to preserve the combined response of the two filters over the overlapping region.
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Citations
29 Claims
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1. A filter user interface control apparatus comprising:
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five keys including a central key and four keys arranged radially around the central key and defining first and second pairs of opposing keys for controlling two or more parameters of a filter;
the first pair of opposing keys for changing a first parameter of a filter;
the second pair of opposing keys for changing a second parameter of the filter; and
the central key and each of the radial keys for operating simultaneously to alter the rate of change of the one of the parameters of the filter. - View Dependent Claims (2)
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3. A filter user interface control apparatus comprising:
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five keys including a central key and four keys arranged radially around the central key and defining first and second pairs of opposing keys;
the first pair of opposing keys including one key for increasing a first parameter of a filter and the other key for decreasing the first parameter of the filter;
the second pair of keys including one key for increasing a second parameter of the filter and the other key for decreasing the second parameter of the filter; and
the central key and each of the radial keys for operating simultaneously to alter the rate of change of the increase or decrease of one of the parameters of the filter. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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- 17. A user interface filter control apparatus comprising five pushbutton keys arranged in a cross pattern where all three parameters of center frequency, bandwidth, and amplitude of a bell filter response are controlled, wherein the left key decreases the filter response center frequency, the right key increases the filter response center frequency, the top key increases the filter response amplitude, the bottom key decreases the filter response amplitude, the center key narrows the filter response bandwidth, and both left and right keys operate simultaneously for widening the filter response bandwidth.
- 21. A user interface control apparatus for a notch filter having controls for parameters of center frequency and bandwidth comprising five pushbutton keys arranged in a cross pattern wherein the left key decreases the filter response center frequency, the right key increases the filter response center frequency, the center key narrows the filter response bandwidth, and both left and right keys simultaneously widens the filter response bandwidth.
- 24. A user interface control apparatus for a shelf filter having controllable parameters of transition frequency, shelf amplitude, and transition slope comprising five pushbutton keys arranged in a cross pattern wherein the left key decreases the filter response transition frequency, the right key increases the filter response transition frequency, the top key increases the filter response shelf amplitude, the bottom key decreases the filter response shelf amplitude, the center key increases the filter response transition slope, and both left and right keys operate together to simultaneously decrease the filter response transition slope.
- 27. A user interface control apparatus for a pass-band filter to control three parameters comprising corner frequency, pass-band amplitude, and transition slope between pass-band and stop-band regions comprising five pushbutton keys arranged in a cross pattern and wherein left key decreases the filter response comer frequency, the right key increases the filter response comer frequency, the top key increases the filter response pass-band amplitude, the bottom key decreases the filter response pass-band amplitude, the center key increases the filter response transition slope between pass-band and stop-band regions, and both left and right keys operate together to simultaneously decreases the filter response transition slope between pass-band and stop-band regions.
Specification