Roland Corporation

Kazuhiko Matsuoka

Nobuhiro Yamada

Shigeru Sawada

Kazuya Yanase

Kazuo Kurahashi

Provided is a plug detachment prevention structure, such that when a plug equipped with a plug terminal and a plug retaining section that covers a part of the plug terminal is connected to a jack provided inside a housing, the plug detachment prevention structure retains the plug retaining section to prevent the plug from detaching from the jack, wherein the plug detachment prevention structure is equipped with a ring-shaped elastic section composed of an elastic material in which the plug retaining section is pressure-inserted, and a frame section that is circularly mounted at an outer circumferential side of the elastic section, composed of a material harder than that of the elastic section and detachably attached on an outside of the housing.

Plug detachment prevention structure

An electronic instrument includes an input device having a plurality of channels to each of which an audio signal is input. A demodulation device demodulates audio signals and converts the audio signals into digital signals that control the electronic instrument. The electronic instrument also includes a feeding device that feeds the digital signals to a sound source and a detection device that detects whether or not the audio signals in any of the plurality of channels are modulated by the digital signals. A controller controls the demodulation device, in cases where it has been detected that any of the audio signals are modulated by the digital signals, so as to demodulate the digital signals from the audio signals that have been input to the channels, such that another channel's audio signals that are not modulated by the digital signals are output to an audio output.

Electronic instrument and reproduction system

Embodiments of the present invention comprise an electronic system by which it is possible to have an accompaniment that automatically tracks the performance tempo of a performer. The system is equipped with a ROM in which a sequence of performance data that comprise a main performance composition that is to be performed by the performer is stored. The system receives input from the performer, for example, keystrokes of a keyboard, and the relative performance tempo of the performance by the performer is calculated with respect to a segment of the performance. An accompaniment is then generated by the system by comparing the detected tempo of the performance of the artist with the tempo of the reference performance that is stored in ROM. By knowing the difference in tempo between the reference piece stored in ROM and the piece as being performed by the performer, the system may then adjust the tempo of the accompaniment to match the tempo of the performance by the artist.

Electronic score tracking musical instrument

A system to automatically stop an automatic performance by means of automatic performance techniques in conformance with the performance by the performer and to alleviate the stress of the performer is described herein. It has a storage means in which the performance data from a multiple number of parts are stored and an automatic performance means in which the performance data that have been stored in the above mentioned storage means are performed automatically and an input means in which optional performance data are input and a comparison means in which the performance data that have been input by the above mentioned input means and the performance data from a specified part that have been stored in the above mentioned storage means are compared and an automatic performance termination control means in which, in those cases where, as a result of the comparison by the above mentioned comparison means, a comparison result that the performance data that have been input by the above mentioned input means and the performance data from a specified part that have been stored in the above mentioned storage means are not in agreement has continued for a specified period of time or longer, the automatic performance by the above mentioned automatic performance means is terminated.

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Hamamatsu, Japan

Kazuhiko Matsuoka