An adaptive dynamic audio hum extractor eliminates line frequency hum components and associated higher harmonics from an audio signal. An audio signal containing line frequency hum can be processed by providing dynamically controlled notch filters at the fundamental line frequency and additional harmonic multiples of the fundamental frequency. The audio signal is detected to provide dynamic control of the depth of the notch filters. Alternatively, an audio signal containing hum can be processed by dividing the spectrum into at least two frequency bands, an unaltered high band combined with a dynamically processed low band. The adaptive dynamically controlled notch filters vary the depth of the notches in relation to the envelope or time averaged level of the bandwidth limited audio signal. This allows masking of the hum components with higher levels of audio, thereby providing transparency devoid of audio path notches.

An audio processing device includes: a first low-pass filter (LPF) to which an audio signal is input; a circuit to which the audio signal is input, including a first high-pass filter (HPF) and a preamplifier; a second HPF to which the audio signal is input; a second LPF to which an output signal of the circuit is input; an extractor, extracting each of an output signal of the first LPF, an output signal of the second HPF, and an output signal of the second LPF at a predetermined ratio; and a mixer, mixing the output signal of the first LPF, the output signal of the second HPF, and the output signal of the second LPF that are extracted.

An audio signal output system including a first audio signal path, a second audio signal path and control electronics that provide a mixed sound from sound sources to the first and second audio signal paths, and control the mixed sound in accordance with a position at which a sound image associated with at least one of the sound sources is localized relative to an orientation of a user's head. The control electronics provide one or more signals corresponding to the mixed sound to the first and second audio signal paths based on one or more transfer functions associated with one or more values corresponding to at least one of a distance from the user to the at least one sound source, an angle of the user with respect to the at least one sound source, and a size of a space in which the user is located.

A pickup, a stringed instrument, and a pickup control method are disclosed. The pickup comprises: pickup components(110), multi-touch screens(130) and processing components(140). The multi-touch screens(130) and the processing components(140) are connected. The pickup components(110) and the processing components(140) are connected. The pickup components(110) is configured to pick up sound information emitted by a musical instrument. The multi-touch screen(130) is configured to display function application information that is selected from a group consisting of timbre adjustment function application information, tone adjustment function application information, and equalizer adjustment function application information. The multi-touch screen is configured to receive a function triggering instruction. The multi-touch screen displays information as to functional applications available through the pickup capabilities. Control functions available to a user are expanded beyond control by a single knob as in the prior art, the playing experience of a user on the instrument is enhanced.

A a control system for dials and switches allows one or more dials and/or switches to be controlled remotely via a wired or a wireless communication. Preferably, the control system is utilized by a user with one or more expression pedals and/or a footswitches to control audio equipment, such as, for example, an amplifier or other audio processor apparatus. Methods of using the same are further provided.

A system and method for an adaptable effects unit is provided. In one aspect, the system allows users to manipulate audio signals transmitted from a musical instrument prior to being output by a speaker. In another aspect, the system allows users to create virtual signal chains that may be used to alter audio signals of a musical instrument without the need of multiple effects units. In yet another aspect, the system may be used in a way that allows a user to customize the controls of a physical effects unit so that the controls better suit the user's needs. Generally, the system allows users alter and customize a physical effects unit via a user interface of a computing device. The physical effects unit is configured in a way such that it may receive instructions from the computing device.

A system including: an electronic memory device and a processor. The processor is configured to: control a communication device to receive first input information indicating a first instruction, the first instruction corresponding to control of sound associated with at least one first sound source; control a transmitter of the communication device to transmit first information to an audio output device, the first information corresponding to the first input information indicating the first instruction; control the communication device to receive second input information indicating a second instruction corresponding to control of sound associated with the at least one second sound source; and control the transmitter to transmit second information to the audio output device, the second information including or corresponding to an audio signal associated with the at least one second sound source and processed according to the second input information indicating the second instruction.

A simple yet effective sustainer for electronic stringed instruments having a bridge pickup and a neck pickup. A driver assembly, disposed adjacent the neck pickup of the instrument, includes a plurality of electromagnetic transducers operative to induce vibrations in the strings. A battery-operated electronic amplifier has an input adapted for connection to the bridge pickup, and an output connected to the driver assembly, such that, when the instrument is played, string vibrations sensed by the bridge pickup are amplified by the electronic amplifier and used to drive the driver assembly, thereby sustaining the played string vibrations. The driver assembly may be disposed in a ring that surrounds the neck pickup of the instrument. The ring may include an ON/OFF switch that routes power from the battery to the electronic amplifier and simultaneously deactivates the bridge pickup in the ON position. The ring may further include a phase reversal switch.

A speaker device includes left and right speakers and a correction part. The correction part corrects frequency characteristics of a stereo audio signal supplied to the left and right speakers so that transfer characteristics of the left and right speakers become predetermined transfer characteristics.

Provided are an electric musical instrument system and a control method thereof. The electric musical instrument system includes a musical sound transmitting means and a musical sound receiving means having a first mode and a second mode that consumes less electric power than the first mode. The musical sound transmitting means has a detecting means for detecting rocking of a musical instrument and a transmitting means that transmits an audio signal emitted from the musical instrument to the musical sound receiving means in the first mode and transmits, when detecting rocking of the musical instruments, detected information to the musical sound receiving means in the second mode. The musical sound receiving means has a controlling means that processes the audio signal received in the first mode and cancels the second mode and changes the mode to the first mode when the detected information is received in the second mode.