Method for synthesizing tone signal and tone signal generating system

A tone signal synthesizing system for producing a tone signal representative of an artificial tone close to an acoustic tone produced through a piano including at least one key moved between a rest position and an end position, at least one action unit linked with said at least one key, at least one hammer driven for rotation by said at least one action unit, at least one vibratory wire for producing said acoustic tones through impact with said at least one hammer, at least one damper linked with said at least one key so as to be spaced from and brought into contact with said at least one vibratory wire depending upon a position of said at least one key, a damper pedal linked with said at least one damper so as to make said at least one damper spaced from and brought into contact with said at least one vibratory wire independent of said position of said at least one key and a vibratory instrument body provided with supporting portions through which said at least one wire is supported,

• said tone signal synthesizing system comprising
• a damper model calculating module including
• a first sub-module acquiring a first piece of data expressing a stroke of a key corresponding to said at least one key and a second piece of data expressing a stroke of a pedal corresponding to said damper pedal and
• a second sub-module determining a third piece of data expressing resistance against vibrations of said at least one wire by said at least one damper by varying a value of viscous coefficient of said at least one damper on the basis of said first and second pieces of data in a time dependent manner, and
• a tone signal producing module determining said tone signal in consideration of said third piece of data.

A method of simulating acoustic tones produced through an acoustic piano for producing a tone signal representative of artificial tones close to said acoustic tones,

• said acoustic piano including
• at least one key moved between a rest position and an end position,
• at least one action unit linked with said at least one key,
• at least one hammer driven for rotation by said at least one action unit,
• at least one vibratory wire for producing said acoustic tones through impact with said at least one hammer,
• at least one damper linked with said at least one key so as to be spaced from and brought into contact with said at least one vibratory wire depending upon a position of said at least one key,
• a soft pedal linked with said at least one key so as to make an impact area of said hammer offset from said at least one vibratory wire and
• a vibratory instrument body provided with supporting portions through which said at least one wire is supported,
• said method comprising the steps of
• a) acquiring a first piece of data expressing a stroke of a pedal corresponding to said soft pedal,
• b) determining a second piece of data expressing impact force exerted on said at least one wire by said at least one hammer by varying a value of modulus of elasticity of said at least one hammer on the basis of said first piece of data in a time dependent manner, and
• c) determining said tone signal in consideration of said second piece of data.

A tone signal synthesizing system for producing a tone signal representative of an artificial tone close to an acoustic tone produced through a piano including at least one key moved between a rest position and an end position, at least one action unit linked with said at least one key, at least one hammer driven for rotation by said at least one action unit, at least one vibratory wire for producing said acoustic tones through impact with said at least one hammer, at least one damper linked with said at least one key so as to be spaced from and brought into contact with said at least one vibratory wire depending upon a position of said at least one key, a soft pedal linked with said at least one key so as to make an impact area of said hammer offset from said at least one vibratory wire and a vibratory instrument body provided with supporting portions through which said at least one wire is supported,

• said tone signal synthesizing system comprising
• a hammer model calculating module including
• a first sub-module acquiring a first piece of data expressing a stroke of a pedal corresponding to said soft pedal and
• a second sub-module determining a second piece of data expressing impact force exerted on said at least one wire by said at least one hammer by varying a value of modulus of elasticity of said at least one hammer on the basis of said first piece of data in a time dependent manner, and
• a tone signal producing module determining said tone signal in consideration of said second piece of data.