Yamaha Corporation

Minoru Kitamura

Satoshi Suzuki

Shinya Sakurada

Yasuhiko Asahi

Tsutomu Imaizumi

Susumu Ishibashi

Toshiyuki Suzuki

Makoto Iwabayashi

When data are to be recorded on a recording medium having imparted thereto a medium ID that is identification information unique to the recording medium, an additional ID related to the medium ID is generated on the basis of the medium ID. Then, the data are encrypted and recorded on the medium along with the additional ID. In reproduction, the medium ID and the additional ID attached to the data are read out from the medium, and then compared to determine whether both of the medium ID and additional ID meet a predetermined matching condition. When the additional ID attached to the data has been determined as meeting the predetermined matching condition, the data is judged to be reproducible data. In this manner, it is possible to promptly determined whether or not the data recorded on the medium are fairly-recorded data, which can effectively prevent unfair use of the data.

Information recording/reproducing apparatus with security measure

In order to play an automatic performance based on performance information which is stored in a storage device and the like in advance, an electronic musical instrument provides an automatic performance apparatus. The automatic performance apparatus is configured by a performance style designating portion, a storage portion, a read-out portion and an automatic performance portion. The performance style designating portion designates a desired performance style within a plurality of performance styles, each of which corresponds to a specific music genre such as rock music, jazz and pop music. The storage portion, such as a read-only memory, stores a plurality of chord progression patterns with respect to each of the performance styles. The read-out portion accesses the storage portion to automatically read out one of the chord progression patterns concerned with the desired performance style which is designated by the performance style designating portion. Herein, each of the chord progression patterns is given a specific priority, so that a certain chord progression pattern given a higher priority is selectively read out from the storage portion. Then, the automatic performance portion, which is configured by a tone generator and a sound system, plays an automatic performance in accordance with the chord progression pattern which is read from the storage portion by the read-out portion.

Automatic performance apparatus for storing chord progression suitable

An electronic piano with a pedal, which can control various parameters by the pedal. The electronic piano has a mode switch for selecting a mode, and the electoronic piano switches parameters to be controlled by the pedal according to the selected mode by the mode switch. The pedal can provide not one but a variety of parameter control functions. Further, an electronic piano with first and second pedals, wherein a relationship between the up/down operation of the first pedal and an increase/decrease in parameter to be controlled is set to be opposite to a relationship between the up/down operation of the second pedal and the increase/decrease in parameter to be controlled.

Electronic musical instrument with a pedal

A musical tone control mechanism for an electronic musical instrument in which a musical tone adjustment rotary body having a rotating shaft extending along the longitudinal direction of a keyboard is provided, the rotary body is divided into a plurality of parts, and an operation position of the rotary body is movable along the longitudinal direction of the keyboard, or a means for selecting an adjustment function of the rotary body is arranged. The musical tone control mechanism further includes an operation amount detector for detecting an operation amount of the rotary body as a pivot amount of a pivot shaft body of the operation amount detector, cylindrical intermediate members fitted to both ends of the rotary body for connecting the pivot shaft body to the rotary body, and bearings having bearing holes for pivotally receiving the intermediate members.

Control mechanism for electronic musical instrument

Plural normal pattern data, plural introduction pattern data, plural fill-in pattern data and plural ending pattern data for each of various accompaniment styles such as march, waltz and rock are stored in a memory. Relation of correspondence among these pattern data is predetermined and, at transfer from one pattern to another such as transfer from a certain introduction pattern to a normal pattern, transfer from a certain normal pattern to a fill-in pattern, transfer back from the fill-in pattern to the normal pattern or transfer from a certain normal pattern to an ending pattern, predetermined pattern data which corresponds to a pattern which has been so far performed is automatically determined and transfer to the determined pattern is automatically made. Transfer of the pattern which is automatically determined can also be changed as desired by selection by the player.

Growing community of inventors

Hamamatsu, Japan

Minoru Kitamura