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US 9,006,552 B2Granted
Effect apparatus for electronic stringed musical instruments
AssigneeRoland Corporation
InventorYasuhiro Fukuda
Life of this patent
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Abstract
Provided are an effect device and method to receive an input tone signal based on vibrations of a stringed instrument. A pitch is determined. Parameters specifying filter characteristics are determined from the pitch. The determined parameters are set in at least one filter. The input tone signal is passed into the at least one filter set with the determined parameters to produce a filter output signal that is used to generate an output signal for feedback performance produced through a speaker.
Claims26
An effect device comprising:
- an input device to which a tone signal based on vibration of strings of a stringed instrument is input;
- a first filter device comprising a band pass filter that passes the tone signal input from the input device;
- a pitch detection device that detects a pitch of the tone signal input from the first filter device and/or a pitch of the tone signal to be input to the first filter device;
- a filter control table providing parameters for the filter device for different frequency bands;
- a setting device that sets the first filter device with the parameters in the filter control table for the frequency band to which the detected pitch belongs, wherein the set parameters cause the first filter device to produce the tone signal for the frequency band to which the detected pitch belongs with frequency characteristics suitable for feedback performance, wherein the parameter set by the setting device includes a center frequency, a Q value comprising a passband width, and a gain of the filter device, wherein when the pitch detected by the pitch detection device belongs to a frequency band of a predetermined mid-range, the setting device sets, at the first filter device, the center frequency to a frequency of a harmonic based on the pitch detected by the pitch detection device and the gain to a predetermined value, and sets, at a second filter device, the center frequency to a pitch detected by the pitch detection device, and the gain to a value smaller than the predetermined value;
- an output device that outputs the tone signal output from the first and second filter devices outside;
- a level detection device that detects a level of the tone signal output from the first and second filter devices and/or a level of the tone signal to be input in the first filter device;
- and
- a level control device that controls the level of the tone signal output outside from the output device to have a level corresponding to the level detected by the level detection device.
6 more elements
An effect device in communication with a stringed instrument and a speaker, comprising:
- a central processing unit (CPU);
- a digital signal processor (DSP) implementing a plurality of filters;
- a filter control table providing parameters for the filters for different frequency bands, wherein the filter control table indicates for each of the frequency bands at least one of the filters to use to filter the input tone signal, and for each of the filters, the parameters specifying the filter characteristics, and wherein multiple of the filters are indicated to use for one of the frequency bands;
- wherein at least one of the CPU and the DSP perform operations comprising:
- receiving an input tone signal based on vibrations of the stringed instrument;
- determining a pitch;
- determining, from the pitch, a frequency band of the detected pitch;
- setting parameters in the filters with filter characteristics in the filter control table for the frequency band to which the detected pitch belongs to provide frequency characteristics suitable for feedback performance;
- and
- passing the input tone signal into the filters set with the determined parameters to produce a filter output signal that is used to generate an output signal for feedback performance produced through the speaker.
7 more elements
A method, comprising:
- providing a filter control table providing parameters for a plurality of filters for different frequency bands, wherein the filter control table indicates for each of the frequency bands at least one of the filters to use to filter the input tone signal, and for each of the indicated filters, the parameters specifying the filter characteristics, and wherein multiple filters are indicated to use for one of the frequency bands;
- receiving an input tone signal based on vibrations of a stringed instrument;
- determining a pitch;
- determining, from the pitch, a frequency band of the detected pitch;
- setting parameters in the filters with filter characteristics in the filter control table for the frequency band to which the detected pitch belongs to provide frequency characteristics suitable for feedback performance;
- passing the input tone signal into the filters set with the determined parameters to produce a filter output signal that is used to generate an output signal for feedback performance produced through a speaker.
3 more elements
Dependencies are inferred from the claim text.