JP2879504B2 - Electronic musical instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument, and more particularly to a portament effect of an electronic musical instrument.
This is suitable for use in an apparatus that applies portamento closer to a natural musical instrument.

[0002]

2. Description of the Related Art As is well known, electronic musical instruments such as electronic organs and synthesizers are provided with a device for adding a portamento effect. The portamento effect performed in a conventional electronic musical instrument is configured such that the speed is variable, but is equally applied from one key-on to the next key-on.

[0003]

Therefore, for example, when portamento is applied to a note number from a low A tone (220 HZ) to a high A tone (880 HZ), a low A tone (220 HZ) to a high A tone at the time when the portamento is applied. Sound (880
HZ), the frequency increases every moment, and when the frequency finally reaches 880 HZ, the frequency becomes constant.

[0004] Therefore, in the case of the conventional portamento addition device, portamento which is impossible with a natural musical instrument may be applied. That is, for example, a violin of a natural musical instrument has four strings (low G, D, A, E high), but portamento is not applied from the G string or the D string toward the A string. Impossible.

[0005] For example, A is two octaves above the A sound.
It is not realistic to play portamento on the same string like a sound. However, in the case of a conventional electronic musical instrument, portamento is applied evenly from one key-on to the next key-on as described above, so that an unnatural portamento that is not present in a natural musical instrument may be applied. Was. The present invention has been made in view of the above problems,
An object of the present invention is to provide an electronic musical instrument capable of playing portamento similar to a natural musical instrument.

[0006]

According to the electronic musical instrument of the present invention, when the second key-on information is received and sounded, the second key-on information is generated.
, The operation of rewriting the frequency information corresponding to the first key-on information every time toward the frequency information corresponding to the second key-on information is started, and the frequency information being rewritten is started. An electronic musical instrument that performs portamento so that the frequency becomes a constant frequency when the frequency reaches the frequency corresponding to the second key-on information,
A key frequency detecting means for detecting an interval between the first key and the second key; and a frequency preset in correspondence with the frequency detected by the key frequency detecting means is added to the first key. The operation for applying portamento is started from the frequency obtained as a result, and portamento is applied so as to go to the frequency corresponding to the second key.

Another feature of the present invention is that
When the second key-on information is given while receiving and sounding the first key-on information, the frequency information corresponding to the first key-on information is instantaneously changed to the frequency information corresponding to the second key-on information. In the electronic musical instrument, a rewriting operation is started, and portamento is applied so that the frequency information being rewritten reaches a constant frequency when the frequency information reaches the frequency corresponding to the second key-on information. Key frequency detecting means provided for detecting an interval between the first key and the second key; and a key frequency detecting means having a size set in advance according to the interval between the first key and the second key. Offset amount calculating means for calculating the offset amount;
An offset amount adding means for adding a frequency corresponding to the first key-on information to the offset amount calculated by the offset amount calculating means to calculate a frequency at which portamento is started to be applied; Portamento processing means for performing a process of changing the frequency toward the frequency corresponding to the key.

[0008]

Since the electronic musical instrument of the present invention has the above-described technical means, when portamento is applied, the offset amount calculated according to the degree of opening (frequency) between the first key-on information and the second key-on information. Is added to the frequency corresponding to the first key-on information, and the frequency at which portamento starts to be applied halfway between the frequency corresponding to the first key and the frequency corresponding to the second key is calculated.
And the frequency corresponding to the second key information can be constantly changed from the frequency corresponding to the key information to the frequency corresponding to the second key information. It becomes possible to play a portamento whose aspect is similar to a natural musical instrument.

[0009]

An embodiment of the electronic musical instrument of the present invention will be described below with reference to the drawings. FIG. 1 is a functional configuration diagram of an electronic musical instrument showing one embodiment of the present invention. In FIG. 1, 1 is a key frequency detecting means, 2 is an offset calculating means, 3 is an offset adding means, 4 is a portamento processing means, and 5 is an assigner (musical sound controlling means).

When the second key-on information S2 is given while the first key-on information S1 is sounding while receiving the first key-on information S1, the key frequency detecting means 1 determines the interval between the first key and the second key, That is, it is provided to detect the frequency.

The offset amount calculating means 2 is provided for calculating an offset amount having a size corresponding to the distance between the first key and the second key. This is for adding the offset amount calculated by the amount calculating means 2 to the frequency corresponding to the first key to calculate the frequency at which portamento is started to be applied.

The portamento processing means 4 is provided for performing a process of changing the frequency from the portamento start frequency obtained by the offset amount adding means 3 toward the frequency corresponding to the second key. The key information S1 and S1 from the assigner 5 are also provided in these offset amount adding means 3 and portamento processing means 4.
2 are given.

Next, the operation of the portamento addition device of the present embodiment will be described with reference to the flowchart of FIG. First, a key scan of the assigner 5 is performed in step P1, and a state of a portamento switch (not shown) is detected in step P2.

If the result of the state detection in step P2 is that the portamento switch is OFF, the routine returns, and if it is ON, the routine proceeds to step P3. Step P
In 3, the key frequency detecting means 1 detects the interval between the frequency corresponding to the first key information and the frequency corresponding to the second key information, that is, the frequency.

When the frequency detection by the key frequency detecting means 1 is completed, the frequency information S3 is derived from the key frequency detecting means 1 to the offset amount calculating means 2. Next, the process proceeds to Step P4, where the offset amount is calculated, and a process of adding the calculated offset amount to the frequency corresponding to the first key is performed.

Various means can be used as means for calculating the offset amount. For example, a table 6 as shown in FIG. Then, by searching the table 6 based on the frequency information provided from the key frequency detecting means 1, an offset amount having a size corresponding to the frequency can be easily obtained.

The offset amount information S4 thus obtained is provided from the offset amount calculating means 2 to the offset amount adding means 3. The offset amount adding means 3 adds a given amount of offset amount to a frequency corresponding to the first key to calculate a frequency at which portamento starts to be applied.

After the frequency at which portamento is started to be applied is obtained by the offset amount adding means 3, the process proceeds to step P5 to perform portamento calculation processing. This calculation processing is processing performed by the portamento processing means 4. When the portamento calculation processing is performed as described above, the frequency is changed from the portamento start frequency to the frequency corresponding to the second key.

FIG. 4 is a diagram for simply explaining the frequency when portamento is applied. As shown in FIG. 4, in this embodiment, an offset amount 10 is calculated, and a portamento start frequency 9 is obtained between a frequency 7 corresponding to the first key and a frequency 8 corresponding to the second key. ing. The portamento 12 is applied from the portamento start frequency 9.

On the other hand, in the conventional electronic musical instrument, portamento is directly applied from the frequency 7 corresponding to the first key, as indicated by 11, so that it is impossible when playing a natural musical instrument. There was the inconvenience of applying portamento. However, in this embodiment, such inconvenience can be reliably eliminated, and a portamento effect closer to a natural musical instrument can be obtained.

[0021]

As described above, according to the present invention, when portamento is applied, the offset amount is calculated according to the degree of opening (frequency) between the first key and the second key, and the offset amount is calculated according to the offset amount. Since the portamento start frequency is obtained and the portamento is started to be applied from the above portamento start frequency, the mode of the frequency change can be made closer to a natural musical instrument, and the portamento effect which is more musical and close to the performance of a natural musical instrument. Can be obtained.

[Brief description of the drawings]

FIG. 1 is a functional configuration diagram of an electronic musical instrument according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the electronic musical instrument of the embodiment.

FIG. 3 is an explanatory diagram of a data table showing an example of a means for calculating an offset amount.

FIG. 4 is a diagram showing a relationship between frequency and frequency.

[Explanation of symbols]

 Reference Signs List 1 Key frequency detecting means 2 Offset amount calculating means 3 Offset amount adding means 4 Portamento processing means 5 Assigner 6 Table 7 Frequency corresponding to first key information 8 Frequency corresponding to second key information 9 Portamento starting frequency 10 Offset amount DESCRIPTION OF SYMBOLS 11 Conventional portamento 12 Portamento of Example S1 First key information S2 Second key information S3 Frequency information S4 Offset amount information S5 Portamento start frequency information

Claims (2)

(57) [Claims] When receiving second key-on information and receiving second key-on information while receiving a tone, frequency information corresponding to the first key-on information is continually added to the second key-on information. An electronic musical instrument for starting portraying to start rewriting operation toward frequency information corresponding to the second key-on information, so as to have a constant frequency when the frequency information being rewritten reaches the frequency corresponding to the second key-on information. In the above, there is provided key frequency detecting means for detecting an interval between the first key and the second key, and a frequency set in advance corresponding to the frequency detected by the key frequency detecting means is stored in the first key. Starting the operation of applying portamento from the frequency obtained by adding to the second key, and applying portamento toward the frequency corresponding to the second key. Electronic musical instruments. 2. When the second key-on information is given while receiving and sounding the first key-on information, frequency information corresponding to the first key-on information is continually added to the second key-on information. The rewriting operation is started toward the frequency information corresponding to the second key-on information, and portamento is performed so that the frequency becomes a constant frequency when the frequency information being rewritten reaches the frequency corresponding to the second key-on information. In the electronic musical instrument, a key frequency detecting means provided for detecting an interval between the first key and the second key; and a key frequency detecting means set in advance according to an interval between the first key and the second key. An offset amount calculating means for calculating an offset amount of a given size; and adding the offset amount calculated by the offset amount calculating means to a frequency corresponding to the first key-on information. Offset addition means for calculating a frequency at which portamento is started to be applied, and portamento processing means for performing a process of changing a frequency from the portamento start frequency to a frequency corresponding to the second key. Characterized electronic musical instruments.