A relationship of 0<.sub.1<2.sub.1 is satisfied, where .sub.1 is an angle formed between a first line which is vertical to a parallel line passing through a pivot center point and being parallel to a pivot extending direction, passes through a center point of a first portion from the center point of the first portion toward the parallel line, and a second line which is vertical, at the center point of the first portion, to a first portion extending direction, passes through the center point of the first portion toward a vertical line being vertical to the parallel line and passing through the pivot center point, and where .sub.1 is an angle formed between the first line and a third line connecting the pivot center point and the center point of the first portion from the center point of the first portion toward the pivot center point.

An apparatus for generating an audio output signal having two or more audio output channels from an audio input signal having two or more audio input channels includes a provider and a signal processor. The provider is adapted to provide first covariance properties of the audio input signal. The signal processor is adapted to generate the audio output signal by applying a mixing rule on at least two of the two or more audio input channels. The signal processor is configured to determine the mixing rule based on the first covariance properties of the audio input signal and based on second covariance properties of the audio output signal, the second covariance properties being different from the first covariance properties.

An operation panel for an audio processing apparatus includes a plurality of components including a user interface that selects at least one output channel among a plurality of output channels and presents a first processing parameter, which indicates a send level from an input channel to the selected at least one output channel, and a second processing parameter different from the first processing parameter. The audio processing apparatus further includes a link receiver that receives, for at least two components, among the plurality of components, for setting a first link mode and a second link mode independently the first link mode for linking the presented first processing parameter, and the second link mode for linking the presented second processing parameter.

An electronic acoustic apparatus includes a control operator, a storage medium, and a processor. The control operator is operable by a user. The storage medium stores a program. The processor is configured to adjust a predetermined control parameter of an audio signal in response to an operation of the control operator. The processor is also configured to determine that the control operator has been operated in a particular operation style different from a normal operation style that adjusts the predetermined control parameter. In response to the operation of the control operator in the particular operation style, the processor is also configured to issue an instruction to execute a predetermined function different from an adjustment of the predetermined control parameter.

An electronic acoustic apparatus includes a control operator, a storage medium, and a processor. The control operator is operable by a user. The storage medium stores a program. The processor is configured to adjust a predetermined control parameter of an audio signal in response to an operation of the control operator. The processor is also configured to determine that the control operator has been operated in a particular operation style different from a normal operation style that adjusts the predetermined control parameter. In response to the operation of the control operator in the particular operation style, the processor is also configured to issue an instruction to execute a predetermined function different from an adjustment of the predetermined control parameter.

A resonance sound signal generation device comprises a designation receiver that receives designation of a pitch, a sound signal instructor that provides an instruction for generating a sound signal corresponding to the designated pitch, a producer that produces a resonance sound signal representing a resonance sound based on a plurality of pitches, a determiner that determines whether another pitch is designated at a time of designation of one pitch, and a resonance sound instructor that instructs the producer to produce a resonance sound signal of the one pitch and a resonance sound signal of the another pitch based on the one pitch and the another pitch when determination is made that the another pitch is designated at the time of designation of the one pitch, and does not instruct the producer to produce resonance sound signals when determination is made that the another pitch is not designated at the time of designation of the one pitch.

A sensing system for a keyboard. Each key sensor comprises passive and active resonant circuits. The passive resonant circuit has a resonant frequency and the active resonant circuit excites the passive resonant circuit at the resonant frequency. A sensor driver drives the active resonant circuit with an RF drive signal, a multiplexing system multiplexes the drive signal such that simultaneously driven key sensors are separated by at least (k1) keys, and a detector detects a level of RF signal from a driven key sensor for sensing a position and/or velocity of a key.

The invention relates to a programmable signal processing and musical instrument setup system for stringed musical instruments, which comprises at least one analog signal processing circuit, a control circuit operably coupled to at least one analog signal processing circuit and a storage unit operably coupled to the control circuit, being arranged on the musical instrument for storing setup parameters for the musical instrument. The system comprises: a communication module with an individual identification information connected to the control circuit for enabling communication with an external programming device, the external programming device comprises a communication module, a control circuit, a display, data input means, and storage means, wherein the storage means of the external programming device is configured for storing an individual identification information of at least one musical instrument, in association with the musical instrument in at least one configuration file. The external programming device is further configured for receiving data from a selected musical instrument, when connected, and sending data to a selected musical instrument, when connected, wherein the data transferred to the musical instrument can be stored in the musical instrument and can be used after the external programming device is disconnected.

The invention relates to a programmable signal processing and musical instrument setup system for stringed musical instruments, which comprises at least one analog signal processing circuit, a control circuit operably coupled to at least one analog signal processing circuit and a storage unit operably coupled to the control circuit, being arranged on the musical instrument for storing setup parameters for the musical instrument. The system comprises: a communication module with an individual identification information connected to the control circuit for enabling communication with an external programming device, the external programming device comprises a communication module, a control circuit, a display, data input means, and storage means, wherein the storage means of the external programming device is configured for storing an individual identification information of at least one musical instrument, in association with the musical instrument in at least one configuration file. The external programming device is further configured for receiving data from a selected musical instrument, when connected, and sending data to a selected musical instrument, when connected, wherein the data transferred to the musical instrument can be stored in the musical instrument and can be used after the external programming device is disconnected.

An electronic musical instrument includes a condition determiner that determines whether an OFF condition for turning off a power supply is satisfied in an automatic power-OFF mode; a noise gate that is opened when a level of an input audio signal exceeds a threshold value and is closed when the level of the input audio signal continues being equal to or lower than the threshold value for a first predetermined period of time; and a controller that turns off the power supply on the condition that the condition determiner determines that the OFF condition is satisfied in the automatic power-OFF mode; and the controller does not turn off the power supply when the noise gate is in an open state, even in the case where the OFF condition is satisfied.