Electronic musical instrument

Claim 2

An electronic musical instrument of a waveshape memory reading type comprising: keyboard means for producing key depression and release signals in response to an operation of each key; a waveshape memory for storing sample values of a waveshape from its attack portion to its decay portion at respective addresses of the memory; an addresser connected to said waveshape memory and to said keyboard means for addressing the waveshape memory in response to a key depression signal thereby producing a tone signal, said waveshape memory storing a sufficient plurality of cycles of vibration with an amplitude defining at least an attack portion of a tone to constitute a tone waveshape imparted with at least an attack envelope, and further comprising a second waveshape memory for storing a decaying envelope, a second addresser connected to said keyboard means, and a multiplier connected to said waveshape memory and said second waveshape memory, said second addresser addressing the second waveshape memory in response to the key release signal, thereby to produce a decay envelope signal, said multiplier multiplying said tone signal and said decay envelope signal.

Claim 3

An electronic musical instrument comprising keyboard means for producing signals in response to an operation of each key in said electronic musical instrument, a first waveshape memory for storing and reproducing an envelope-imparted tone waveshape in the attack period of each musical sound to be generated, a second waveshape memory for storing and reproducing a waveshape of said each musical sound in at least one fundamental period, a third waveshape memory for storing and reproducing an envelope of at least a decaying character, a first addresser connected to said first waveshape memory and to said keyboard means for addressing this first waveshape memory in response to said signals, a second addresser connected to said second waveshape memory and to said keyboard means for addressing this second waveshape memory in response to said signals, a third addresser connected to said third waveshape memory and to said keyboard means for addressing this third waveshape memory in response to said signals, a multiplier connected to said second and third waveshape memories for multiplying waveshape signals read out from the second and third waveshape memories, and an adder connected to said first waveshape memory and said multiplier for adding a product signal of said multiplier and a waveshape signal read out from said first waveshape memory.

Claim 4

An electronic musical instrument comprising keyboard means for producing signals in response to an operation of each key in said electronic musical instrument, a first waveshape memory for storing and reproducing an envelope-imparted tone waveshape in the attack period of each musical sound to be generated, a second waveshape memory for storing and reproducing a waveshape of said each musical sound in at least one fundamental period, a third waveshape memory for storing and reproducing an envelope of at least a decaying character, a first addresser connected to said first waveshape memory and to said keyboard means for addressing this first waveshape memory in response to said signals, a second addresser connected to said second waveshape memory and to said keyboard means for addressing this second waveshape memory in response to said signals, a third addresser connected to said third waveshape memory and to said keyboard means for addressing this third waveshape memory in response to said signals, a multiplier connected to said second and third waveshape memories for multiplying waveshape signals read out from the second and third waveshape memories, and an adder connected to said first waveshape memory and said multiplier for adding a product signal of said multiplier and a waveshape signal read out from said first waveshape memory.

Claim 5

The electronic musical instrument according to claim 2, further comprising a damper switch and means for controlling said third addresser by a signal from said damper switch in said electronic musical instrument.

Claim 6

The electronic musical instrument according to claim 2, further comprising means for generating a clock signal and means for controlling said third addresser by said clock signal.

Claim 7

The electronic musical instrument according to claim 2, wherein said first waveshape memory comprises a plurality of waveshape memory devices each of which stores an envelope-imparted tone waveshape in the attack period with a different magnitude from one another, and the electronic musical instrument further comprising means connected to said keyboard means for sensing the key touch and designating one out of said waveshape memory devices according to a predetermined relation with respect to the key touch, thereby producing musical sounds which vary in response to the key touch.

Claim 8

An electronic musical instrument comprising keyboard means for producing signals in response to an operation of each key in said electronic musical instrument, a first waveshape memory for storing and reproducing an envelope-imparted tone waveshape in the attack period of each musical sound to be generated, a second waveshape memory for storing and reproducing a waveshape of said each musical sound in at least one fundamental period, a third waveshape memory for storing and reproducing an envelope-imparted tone waveshape in the decay period of said each musical sound, a first addresser connected to said first waveshape memory and to said keyboard means for addressing this first waveshape memory in response to said signals, a second addresser connected to said second waveshape memory and to said keyboard means for addressing this second waveshape memory in response to said signals, a third addresser connected to said third waveshape memory and to said keyboard means for addressing this third waveshape memory in response to said signals, and an adder connected to said first, second and third waveshape memories for adding waveshape signals read out from said waveshape memories.

Claim 9

An electronic musical instrument comprising keyboard means for producing signals in response to an operation of each key in said electronic musical instrument, a first waveshape memory for storing and reproducing an envelope-imparted tone waveshape in the attack period of each musical sound to be generated, a second waveshape memory for storing and reproducing a waveshape of said each musical sound in at least one fundamental period, a third waveshape memory for storing and reproducing an envelope-imparted tone waveshape in the decay period of said each musical sound, a first addresser connected to said first waveshape memory and to said keyboard means for addressing this first waveshape memory in response to said signals, a second addresser connected to said second waveshape memory and to said keyboard means for addressing this second waveshape memory in response to said signals, a third addresser connected to said third waveshape memory and to said keyboard means for addressing this third waveshape memory in response to said signals, and an adder connected to said first, second and third waveshape memories for adding waveshape signals read out from said waveshape memories.

Claim 10

The electronic musical instrument according to claim 6, wherein said first waveshape memory comprises waveshape memory devices each of which stores an envelope-imparted tone waveshape in the attack period corresponding to a key touch, and the electronic musical instrument further comprising means connected to said keyboard means for sensing the key touch and designating a corresponding one of said waveshape memory devices, thereby generating musical sounds which vary in response to the key touch.

Claim 11

An electronic musical instrument of a waveshape memory reading type comprising: keyboard means for producing key depression and release signals in response to an operation of each key; a first waveshape memory for storing sample values of a waveshape at respective addresses of the memory; a first addresser connected to said first waveshape memory and to said keyboard means for addressing the first waveshape memory in response to a key depression signal thereby producing a tone signal, said first waveshape memory storing a sufficient plurality of cycles of vibration with an amplitude defining at least an attack portion of a tone to constitute a tone waveshape imparted with at least an attack envelope; a second waveshape memory storing sample values of a waveform defining at least one cycle of a tone wave; a second addresser connected to said second waveshape memory and to the first addresser for repetitively addressing the second waveshape memory after addressing of the first waveshape memory by said first addresser, thus producing a tone signal of a constant amplitude; a third waveshape memory storing a decay envelope; a third addresser connected to said thrid waveshape memory and to said first addresser for addressing the third waveshape memory immediately after the first addresser finishes addressing the first waveshape memory, thus producing a decay envelope signal; a multiplier connected to said second waveshape memory and to said third waveshape memory for multiplying said tone signal and said decay envelope signal; and an adder connected to said first waveshape memory and to said multiplier for adding the outputs from the first waveshape memory and the outputs from the multiplier.

Claim 12

An electronic musical instrument of a waveshape memory reading type comprising: keyboard means for producing key depression and release signals in response to an operation of each key; a first waveshape memory for storing sample values of a waveshape at respective addresses of the memory; a first addresser connected to said first waveshape memory and to said keyboard means for addressing the first waveshape memory in response to a key depression signal thereby producing a tone signal, said first waveshape memory storing a sufficient plurality of cycles of vibration with an amplitude defining at least an attack portion of a tone to constitute a tone waveshape imparted with at least an attack envelope; a second waveshape memory storing sample values of a waveform defining at least one cycle of a tone wave; a second addresser connected to said second waveshape memory and to the first addresser for repetitively addressing the second waveshape memory after addressing of the first waveshape memory by said first addresser, thus producing a tone signal of a constant amplitude; a third waveshape memory storing a decay envelope; a third addresser connected to said thrid waveshape memory and to said first addresser for addressing the third waveshape memory immediately after the first addresser finishes addressing the first waveshape memory, thus producing a decay envelope signal; a multiplier connected to said second waveshape memory and to said third waveshape memory for multiplying said tone signal and said decay envelope signal; and an adder connected to said first waveshape memory and to said multiplier for adding the outputs from the first waveshape memory and the outputs from the multiplier.

Claim 13

An electronic musical instrument of a waveshape memory reading type comprising: keyboard means for producing key depression and release signals in response to an operation of each key; a first waveshape memory for storing sample values of a waveshape at respective addresses of the memory; a first addresser connected to said first waveshape memory and to said keyboard means for addressing the first waveshape memory in response to a key depression signal thereby producing a tone signal said first waveshape memory storing a sufficient plurality of cycles of vibration with an amplitude defining at least an attack portion of a tone to constitute a tone waveshape imparted with at least an attack envelope; a second waveshape memory storing sample values of a waveform defining at least one tone duration, a second addresser connected to said second waveshape memory and to the first addresser for repetitively addressing the second waveshape memory immediately after the first addresser finishes addressing the first waveshape memory, thus producing a tone signal of a constant amplitude; a third waveshape memory storing a decay envelope; a third addresser connected to said third waveshape memory and to said keyboard means for addressing the third waveshape memory in response to said key release signal, thus producing a decay envelope signal; a multiplier connected to said second waveshape memory and to said third waveshape memory for multiplying said tone signal and said decay envelope signal; and an adder connected to said first waveshape memory and to said multiplier for adding the outputs from the first waveshape memory and the outputs from the multiplier.

Claim 14

An electronic musical instrument of a waveshape memory reading type comprising: keyboard means for producing key depression and release signals in response to an operation of each key; a first waveshape memory for storing sample values of a waveshape at respective addresses of the memory; a first addresser connected to said first waveshape memory and to said keyboard means for addressing the first waveshape memory in response to a key depression signal thereby producing a tone signal said first waveshape memory storing a sufficient plurality of cycles of vibration with an amplitude defining at least an attack portion of a tone to constitute a tone waveshape imparted with at least an attack envelope; a second waveshape memory storing sample values of a waveform defining at least one tone duration, a second addresser connected to said second waveshape memory and to the first addresser for repetitively addressing the second waveshape memory immediately after the first addresser finishes addressing the first waveshape memory, thus producing a tone signal of a constant amplitude; a third waveshape memory storing a decay envelope; a third addresser connected to said third waveshape memory and to said keyboard means for addressing the third waveshape memory in response to said key release signal, thus producing a decay envelope signal; a multiplier connected to said second waveshape memory and to said third waveshape memory for multiplying said tone signal and said decay envelope signal; and an adder connected to said first waveshape memory and to said multiplier for adding the outputs from the first waveshape memory and the outputs from the multiplier.