Claims
- 1. An electronic musical instrument comprising:
- means for generating a key address code corresponding to a depressed key;
- a frequency information memory for storing basic frequency information corresponding to notes of respective keys and producing, upon receipt of said key address code, frequency information corresponding to said key address code;
- a glide code generator comprising a clock pulse generator, a counter for counting the clock pulses generated and producing a glide code output which progressively changes in value with the pulse count, and a glide controller for controlling the counting operation of said counter to perform counting during only a predetermined period of time;
- a glide information generator coupled to said glide code generator and responsive to the glide code output thereof for producing a glide information output which initially represents a value other than 1 and thereafter changes in equal increments in time step with said glide code output until it represents a value equal to 1;
- a multiplier coupled to said glide information generator and said frequency information memory for multiplying said glide information output with the basic frequency information produced by said frequency information memory;
- a frequency counter for receiving and cumulatively counting the multiplication results of said multiplier; and
- a musical tone waveshape memory for storing a desired musical tone waveshape which is read out by the output of said frequency counter.
- 2. An electronic musical instrument as defined in claim 1, further comprising means for establishing the frequency of said clock pulses individually for each of a plurality of keyboards.
- 3. An electronic musical instrument as defined in claim 1, wherein the output of said glide information generator is a gradually decreasing function.
- 4. An electronic musical instrument as defined in claim 1, wherein the output of said glide information generator is a gradually increasing function.
- 5. An electronic musical instrument as defined in claim 1, wherein said key address code generating means is operative in response to the depression of said key for producing an attack start signal, said glide controller receiving said attack start signal and being responsive thereto for controlling said counting operation of said counter to perform counting during only the time period of the attack portion of said musical tone waveshape.
- 6. An electronic musical instrument as defined in claim 5, further comprising means for establishing the frequency of said clock pulses individually for each of a plurality of keyboards.
- 7. An electronic musical instrument as defined in claim 5, wherein the output of said glide information generator is a graudally decreasing function.
- 8. An electronic musical instrument as defined in claim 5, wherein the output of said glide information generator is a gradually increasing function.
Priority Claims (2)
Number |
Date |
Country |
Kind |
49-61712 |
May 1974 |
JPX |
|
49-61713 |
May 1974 |
JPX |
|
Parent Case Info
This is a continuation, division, of application Ser. No. 581,180 filed May 27, 1975 now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3854366 |
Deutsch |
Dec 1974 |
|
3929053 |
Deutsch |
Dec 1975 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
581180 |
May 1975 |
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