A keyboard device is provided including a chassis; a mass body which is turnably installed in the chassis; and transmission means which transmits a driving force in response to key touching of a key to the mass body, wherein the mass body includes an inner wheel and an outer wheel installed on a radially outward side of the inner wheel and is configured to serve as a component for transmitting a torque in one-way direction between the inner wheel and the outer wheel. The transmission means is engaged with one of the inner wheel and the outer wheel of the mass body. The torque is transmitted between the inner wheel and the outer wheel of the mass body at a time of key touching. The torque is not transmitted between the inner wheel and the outer wheel of the mass body at a time of key release.

An effect imparting device, control method and non-transitory computer readable medium are provided. This effect imparting device has: a plurality of effect units that provide effects to sound that has been input; a storage part for storing a plurality of patches each including a collection of parameters to be applied to the effect units; an input part for receives a designation of a patch; an application part for applying the parameters included in the designated patch to the effect units; an output part for outputting the sound to which effects have been provided in accordance with the parameters applied to the effect units; and a muting means for temporarily muting the effectsprovided sound to be outputted when the effects units include an effect unit in which the type of an effect is changed through changing of the designated patch.

A keyboard device is provided including a chassis; a mass body which is turnably installed in the chassis; and transmission means which transmits a driving force in response to key touching of a key to the mass body, wherein the mass body inclues an inner wheel and an outer wheel installed on a radially outward side of the inner wheel and is configured to serve as a component for transmitting a torque in one-way direction between the inner wheel and the outer wheel. The transmission means is engaged with one of the inner wheel and the outer wheel of the mass body. The torque is transmitted between the inner wheel and the outer wheel of the mass body at a time of key touching. The torque is not transmitted between the inner wheel and the outer wheel of the mass body at a time of key release.

Apparatuses, systems and methods are presented which provide for a musical instrument direct box combined with a musical instrument tuner which may be phantom powered from an external audio system. In some embodiments, an apparatus is presented that includes a direct box (DI) module and a musical instrument tuner module coupled to the DI module. The instrument tuner module may be phantom powered based on connection to a remote system geographically distinct from the apparatus, and configured to measure the pitch of the instrument signal and mute the instrument signal simultaneously. In some example embodiments, the apparatus may also include a tuning transformer coupled to the musical instrument tuner module and the DI module, the tuning transformer configured to galvanically isolate a ground domain of the instrument signal from a ground domain of the remote system while the musical instrument tuner module measures the pitch of the musical instrument signal.

When an effect parameter of an effector is changed, if only a switching operation is provided to bypass the original audio signals, which are input signals of the effector, during the period required for making that change, the output sound level may drastically change before and after the switching causing one to feel a sense of discomfort. In order to eliminate such a drawback, a gain adjustment circuit is provided in a bypass channel that outputs the original audio signals by bypassing the effector. The gain adjustment circuit is controlled in accordance with a rate of the output signal level of the effector and the original audio signal level, and the output signal level of the bypass channel is adjusted thereby. Consequently, a fluctuation in the output sound level before and after switching of the output signals can be eliminated.

There is provided an audio data processing device. The device includes an IN terminal to which first audio data from outside are input, a THRU terminal from which the first audio data are output to the outside, an FPGA which signal-processes the first audio data from the IN terminal, an OUT terminal from which second audio data which are signal-processed are output to the outside, and a power supply switch. The FPGA outputs the first audio data from the IN terminal to the THRU terminal without any processing when the power supply switch is in an ON state and is also supplied with operational power and outputs the first audio data from the IN terminal to the THRU terminal without any processing when the power supply switch is in an OFF state.