Tone signal generation device for an electronic musical instrument

Claim 2

A tone signal generation device comprising: basic tone signal generation means comprising a first .waveshape memory for storing basic waveshape data in continuous or intermittent plural periods for a partial or full tone waveshape from the start of sounding of a tone to the end thereof and for generating a basic tone signal in accordance with said basic waveshape data read out from said first waveshape memory; modification waveshape generation means comprising a second waveshape memory for storing modification waveshape data of a modification waveshape for a partial or full tone waveshape from the start of sounding of a tone to the end thereof and for generating a modification waveshape signal in accordance with said modification waveshape data read out from said second waveshape memory; weighting means for weighting said basic tone signal and said modification waveshape signal by individually using separate weighting coefficients; and weighting coefficient generation means for generating said separate weighting coefficients in response to tone color change parameters.

Claim 3

A tone signal generation device as defined in Claim 1 wherein said modification waveshape generation means comprises tone color changing means for changing said modification waveshape in response to the tone color change parameters.

Claim 4

A tone signal generation device as defined in Claim 1 wherein said tone color change parameters designate changing of the tone pitch or tone range of the tone to be generated.

Claim 5

A tone signal generation device as defined in Claim 1 wherein said tone color change parameters designate changing of the tone color in accordance with degree of touch applied to a key for designating the tone to be generated.

Claim 6

A tone signal generation device as defined in Claim 1 wherein said tone color change parameters designate changing of the tone color in accordance with an operated state of a control knob.

Claim 7

A tone signal generation device as defined in Claim 2 wherein said tone color changing means comprises feedback means for feeding back the output signal of said second waveshape memory at a rate corresponding to said tone color change parameters and modulation means responsive to a fed back signal for modulating an address signal used for accessing said second waveshape memory.

Claim 8

A tone signal generation device as defined in Claim 6 wherein said feedback means comprises a digital filter whose frequency-amplitude characteristics controlled in response to said tone color change parameters in the feedback loop.

Claim 9

A tone signal generation device as defined in Claim 2 wherein said tone color changing means comprises a digital filter for filtering said modification waveshape signal, frequency-amplitude characteristics of said digital filter being controlled in accordance with said tone color change parameters.

Claim 10

An electronic musical instrument comprising: tone pitch designation means for designating a tone pitch of a tone to be generated; basic tone signal generation means comprising a first waveshape memory for storing basic waveshape data representing a waveshape of a first tone color and of plural periods out of a tone waveshape from the start of sounding of the tone to the end thereof, said basic waveshape data being read out at a speed determined in accordance with the tone pitch designated by said tone pitch designation means, and for generating a basic tone signal in response to said basic waveshape data; modification waveshape generation means comprising a second waveshape memory for storing modification waveshape data of a modification waveshape for a partial or full tone waveshape from the start of sounding of a tone to the end thereof, said modification waveshape data being read out at a speed determined in accordance with the tone pitch designated by said tone pitch designation means, and for generating a modification waveshape signal in response to said modification waveshape data; tone color adjusting means for providing tone color adjusting signals; combining means for combining said basic tone signal and said modification waveshape signal to provide a combined signal as a tone signal; and combining ratio control means for controlling, responsive to said tone color adjusting signals, a ratio of combining said basic signal and said modification waveshape signal in said combining means.

Claim 11

An electronic musical instrument comprising: tone pitch designation means for designating a tone pitch of a tone to be generated; basic tone signal generation means comprising a first waveshape memory for storing basic waveshape data representing a waveshape of a first tone color and of plural periods out of a tone waveshape from the start of sounding of the tone to the end thereof, said basic waveshape data being read out at a speed determined in accordance with the tone pitch designated by said tone pitch designation means, and for generating a basic tone signal in response to said basic waveshape data; modification waveshape generation means comprising a second waveshape memory for storing modification waveshape data of a modification waveshape for a partial or full tone waveshape from the start of sounding of a tone to the end thereof, said modification waveshape data being read out at a speed determined in accordance with the tone pitch designated by said tone pitch designation means, and for generating a modification waveshape signal in response to said modification waveshape data; tone color adjusting means for providing tone color adjusting signals; combining means for combining said basic tone signal and said modification waveshape signal to provide a combined signal as a tone signal; and combining ratio control means for controlling, responsive to said tone color adjusting signals, a ratio of combining said basic signal and said modification waveshape signal in said combining means.