Yamaha Corporation

Junji Kuroda

Yasuyuki Umeyama

Eiji Akazawa

Based on the understanding that time-varying characteristics of a tone element, such as an amplitude and pitch, in waveform data acquired through a live performance of a musical instrument include a variation component intended or controllable by a human player and a variation component not intended or non-controllable by the human player, the present invention allows the two components to be adjusted/controlled separately and independently of each other, so as to achieve effective and high-quality control. Discrete variation value train is acquired for at least one particular tone element in original waveform data, and the acquired variation value train is separated, in accordance with a time constant factor, into a 'swell' value train of a relatively great time constant and a 'fluctuation' value train of a relatively small time constant. The &#x201c;swell&#x201d; value train and &#x201c;fluctuation&#x201d; value train are variably controlled independently of each other. In this way, high-quality control can be performed on tone elements, such as an amplitude and pitch, included in the sampled waveform data.

Tone data generation method and tone synthesis method, and apparatus therefor

Rendition style determining apparatus detects at least one of duration of a first note to be performed at a given time point and time interval between the first note and a second note to be performed following the first note, in order to automatically impart music piece data with an appropriate rendition style. Rendition style to be imparted to the music piece data in relation to the given time point is determined on the basis of the detected duration or time interval. Also, the apparatus can readily control the rendition style to be imparted to the music piece data, by appropriately setting/changing rendition style determination conditions, such as reference time lengths. Music piece data is supplied to a determination device, thereby causes the determination device to perform automatic rendition style determination based on the supplied music piece data and then displays the rendition style imparted to the music piece data.

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Hamamatsu, Japan

Junji Kuroda