JP4379455B2 - Electronic musical instrument and electronic musical instrument control program - Google Patents

Description

  The present invention relates to an electronic musical instrument and a program for controlling an electronic musical instrument that can generate a musical sound using an external waveform captured from the outside.

2. Description of the Related Art Conventionally, there are known samplers capable of picking up and sampling external sounds such as natural musical instrument sounds, singing sounds and voices with a microphone, storing them in a storage device, and reproducing and outputting the stored external sounds arbitrarily. An electronic musical instrument can also have a sampler function, and an external sound sampled and captured can be handled as one of PCM sound source waveforms. In this case, the reproduction pitch of the external sound sampled and captured can be changed by changing the number of samples reproduced per unit time.
In an electronic musical instrument having a conventional sampler function, a waveform of an external sound sampled and captured can be displayed on a display unit and set as a waveform using a predetermined range. In this case, a waveform to be used can be composed of an attack waveform that represents the rising edge of the waveform and a loop waveform that is repeatedly played, and a start point that indicates the start position of the attack waveform and a loop start point that indicates the start position of the loop waveform, The end point indicating the end position of the waveform is designated on the waveform displayed on the display unit.
JP 2003-186476 A

  FIG. 5 shows a display mode in which a waveform of an external sound sampled and captured in an electronic musical instrument having a conventional sampler function is displayed on the display screen of the display unit. The display mode shown in FIG. 5 is a normal display mode in which the magnification is “1” without enlarging / reducing the captured external waveform. On the normally displayed display screen, the start point (S) of the attack waveform set to the waveform of the external sound, the loop start point (L) of the loop waveform, and the end point (E) of the waveform are also displayed. . When setting the start point (S), the loop start point (L), and the end point (E) in the waveform of the external sound on the display screen, the settings are made while checking the waveform near the point. In this case, it is preferable to set while confirming the waveform shape which is easy to see by increasing the display magnification.

  Here, FIG. 6 shows a display mode in which the waveform of the external sound when the zoom-in button (Zoom In) provided on the panel of the electronic musical instrument is pressed is enlarged. The display magnification in this case is, for example, four times the normal display, and the waveform in the vicinity of the start point (S) and the loop start point (L) can be observed in detail, but the end point (E) The waveform in the vicinity of is protruded from the display screen and cannot be observed. In order to observe, the displayed waveform must be moved in the horizontal direction. Therefore, FIG. 7 shows a display mode in which the waveform of the external sound when the zoom out button (Zoom Out) provided on the panel of the electronic musical instrument is pressed is reduced. The display magnification in this case is, for example, a magnification of 1/4 of the normal display, and the start point (S), loop start point (L), and end point (E) are all displayed on the waveform, but on the display screen Therefore, the waveform in the vicinity of these points cannot be observed in detail. Note that magnification setting means for displaying the waveform of the external sound on the display screen at an arbitrary magnification instead of the zoom-in button (Zoom In) and the zoom-out button (Zoom Out) is also provided.

By the way, when the waveform of the external sound from the start point (S) to the end point (E) is displayed over the entire width of the display screen, the waveform in the vicinity of each point can be confirmed, and the setting of each point is set. And waveform editing can be performed easily. As described above, in order to display the waveform of the external sound from the start point (S) to the end point (E) over the entire width of the display screen, it is appropriate to set the display magnification many times by the magnification setting means. There was a problem that the display magnification had to be adjusted and the operation became complicated. Furthermore, it is necessary to set the waveform display start position in the vicinity of the start point (S), and there is another problem that the waveform must be moved in the horizontal direction.
Accordingly, the present invention provides an electronic musical instrument and a program for controlling an electronic musical instrument in which the waveform of an external sound from the start point to the end point is displayed over the entire width of the display screen by performing a simple operation. It is an object.

In order to achieve the above object, the electronic musical instrument and the electronic musical instrument control program according to the present invention, when an operation to change the display mode is performed, the waveform in the region from the specified start point to the end point in the external waveform is displayed. , together with the waveform of the margin area after the waveform and the end point before the margin area of the start point, by determining a display magnification that is displayed over substantially the entire display width of the display area of the display unit, the start point on the display means The main feature is that it has display control means for displaying external waveforms from the waveform in the margin area before the end point to the waveform in the margin area after the end point at the determined display magnification.

  According to the present invention, when operated, the waveform of the region from the start point to the end point in the external waveform is displayed together with the waveform of the margin region before the start point and the waveform of the margin region after the end point. Since the operation means for determining the display magnification to be displayed over almost the entire display width of the display area is provided, the waveform of the external sound from the start point to the end point can be reduced by simply operating the operation means. It will be displayed throughout. In addition, since the waveform in the margin area is displayed before the start point and the waveform in the margin area is also displayed after the end point, it is possible to check the waveforms in the vicinity of the start point and the end point.

FIG. 1 is a block diagram showing the configuration of an electronic musical instrument 1 according to an embodiment of the present invention.
In the electronic musical instrument 1 shown in FIG. 1, a CPU (Central Processing Unit) 10 controls the overall operation of the electronic musical instrument 1 and also operates software such as a drawing program and an electronic musical instrument control program for displaying waveforms on the display unit 15. Is running. A ROM (Read Only Memory) 11 stores at least operation software such as a drawing program executed by the CPU 10 and an electronic musical instrument control program. A RAM (Random Access Memory) 12 stores a work area of the CPU 10 and various data. Storage area is set. By making this ROM 11 a rewritable ROM such as a flash memory, the operation software can be rewritten and the operation software can be easily upgraded.

  The detection circuit 14 detects an event of the operation element 13 by scanning the operation element 13 such as a keyboard, a panel operation element, or a pointer device, and outputs an event output corresponding to the operation element 13 having the event. . The operator 13 has a zoom-in button (Zoom In) for enlarging and displaying the waveform displayed on the display unit 15 when pressed, and a zoom-out button for reducing and displaying the waveform displayed on the display unit 15 when pressed. (Zoom Out), at least a display button (Display) for displaying the waveform displayed on the display unit 15 when pressed down over almost the entire display width of the display unit 15 is included. The display circuit 16 includes a display unit 15 such as a liquid crystal (LCD). The display unit 15 displays a screen of various settings for generating a waveform of external sound captured by the electronic musical instrument 1 and a musical sound. Various settings can be set by the user using a GUI (Graphical User Interface). The communication interface (I / F) 18 is an interface for connecting the electronic musical instrument 1 to a communication network such as a LAN (local area network), the Internet, or a telephone line, and is connected to the external device 17 via the communication network. Can do. As a result, PCM waveform data and various programs can be downloaded from the external device 17. The downloaded PCM waveform data or the like is stored in the RAM 12 or a hard disk device (not shown). The voice interface (I / F) is an interface for sampling and taking in external sounds such as natural instrument sounds, singing sounds and voices, and outputting musical sound signals generated in the electronic musical instrument 1 to the outside. The external device 19 is a microphone for taking external sound into the electronic musical instrument 1 via the audio I / F 20 or a speaker for emitting the generated musical sound signal. Each of these units is connected to the communication bus 21. Although not shown, the electronic musical instrument 1 includes a tone generator circuit, and this tone generator circuit is a PCM tone generator that can generate a musical tone using a PCM waveform. This PCM sound source can generate musical sounds using PCM waveform data such as natural musical instrument sounds, singing sounds, and voices captured from the outside.

The electronic musical instrument 1 of the present invention has a sampler function, samples external sounds such as natural musical instrument sounds, singing sounds, and voices from the microphone as the external device 19 via the voice I / F 20 and takes them into the electronic musical instrument 1. be able to. The waveform of the external sound sampled and captured can be displayed on the display unit 15 and set as a waveform using a predetermined range. In this case, a waveform to be used can be composed of an attack waveform that represents the rising edge of the waveform and a loop waveform that is repeatedly played, and a start point that indicates the start position of the attack waveform and a loop start point that indicates the start position of the loop waveform, The end point indicating the end position of the waveform is designated by operating the operator 13 on the waveform displayed on the display unit 15. In this way, the external sound sampled and captured can be stored in the RAM 12 or a storage device (not shown) as one piece of PCM waveform data (voice data). In this case, in the PCM sound source, the reproduction pitch of the voice data sampled and captured can be changed by changing the number of samples reproduced per unit time.
In the electronic musical instrument 1 of the present invention, a zoom-in button (Zoom In) for enlarging and displaying the waveform of the external sound displayed on the display unit 15 when pressed as the operation element 13, and the display unit 15 when pressed. In addition to the zoom-out button (Zoom Out) for reducing the displayed external sound waveform, the external sound waveform displayed on the display unit 15 when pressed is displayed over almost the entire display width of the display unit 15. A display button (Display) is provided. These buttons are installed in the vicinity of the display unit 15, and a waveform displayed on the display unit 15 when the display button (Display) is pressed will be described below.

A display mode of normal display in which the waveform of the external sound sampled and captured is displayed on the display screen of the display unit 15 is shown in FIG. In FIG. 2, the horizontal direction is the time axis, and time passes from the left to the right of the page. In normal display, the display magnification is set to “1” without enlarging / reducing the waveform of the captured external sound. On the normally displayed display screen, the start point (S) of the attack waveform, the start point (L) of the loop waveform and the end point (E) of the waveform set to the waveform of the external sound are also displayed. In this case, S _S is the position information of the start point (S) in units of samples, and S _E is the position information of the end points (E) in units of samples, from the start point (S) to the end points (E). The number of samples _NS is
N _S = S _E −S _S (1)
Can be represented by

Here, when the display button (Display) is pressed, as shown in FIG. 3, the display width of the display screen of the display unit 15 is displayed so that the range from the start point (S) to the end point (E) just fits. In this case, the waveform of the number of dots N _MF of time prior to the start point (S) is displayed, it is also displayed together waveform dot number N _MR time after the endpoint (E). As described above, the waveform from the start point (S) to the end point (E) and the waveform before and after the waveform are displayed as margins, so that the waveform from the start point (S) to the end point (E) is confirmed. In addition, the waveform near the start point (S) and the waveform near the end point (E) can be confirmed. In addition, by a simple operation by simply pressing the display button (Display), the display width of the display screen of the display unit 15 is exactly the waveform from the start point (S) to the end point (E) and the margin before and after that. Displayed to fit.
When the zoom-in button (Zoom In) is pressed, the waveform of the external sound is enlarged and displayed, and the display mode is the same as the display mode shown in FIG. Further, when the zoom out button (Zoom Out) is pressed, the waveform of the external sound is reduced and displayed, and the display mode is the same as the display mode shown in FIG.

Next, FIG. 4 shows a flowchart of the drawing process executed in the CPU 10 when the display button (Display) is pressed.
When the display button (Display) is pressed and the drawing process shown in FIG. 4 is started, the position information in units of samples of the start point (S) of the waveform data displayed on the display screen of the display unit 15 in step S10. S _S and position information S _{E of} the end point (E) in units of samples are acquired. Then, by calculating the equation (1) at step S11, it calculates the number of samples N _S from the start point (S) to the end point (E). Next, to obtain the display width N _D of dots of the display area of the LCD of the display section 15 at step S12. Then, to set the width N _MR of dots margin provided after the width N _MF of dot margin provided before the waveform data at step S13. In this case, the width of the margin are preferably set in accordance with the number of samples N _S from but may start point be set to any width (S) to the end point (E). Here, in step S14, a display magnification for displaying the waveform over almost the entire display width of the display screen with a margin before and after the waveform is calculated. In the first embodiment for calculating the display magnification, the display magnification EX1 is calculated by the following equation.
EX1 = N _D / (N _S + N _MF + N _MR ) (2)
(2) In the formula, N _S is the number of samples N _S from the (1) start point calculated by the formula (S) to the end point (E). When the display magnification of the equation (2) above, the region of the waveform of the margin to be displayed on the display screen, to display the start point (S) in a length corresponding to the number of samples N _S to endpoint (E) Can do.

Further, in the second embodiment for calculating the display magnification, the display magnification EX1 obtained by the above equation (2) is compared with a plurality of fixed magnifications prepared in advance as the display magnification of the display unit 15. The fixed magnification closest to the zoom-out side (smaller) than the calculated display magnification EX1 among the plurality of fixed magnifications is set as the display magnification EX2. For example, when the display magnification EX1 calculated in the above (2) is 1/7, a plurality of prepared fixed magnifications are 1/1, 1/2, 1/4, 1/8, 1 In the case of / 16, 1/8 is set as the display magnification EX2. In this case, the width N _MF previous margin 1/7 from excess area caused to change the magnification ratio to 1/8 endpoint (E) the width N _MR or start point of the margin after the (S) In addition, the waveform is displayed. When the display magnification is calculated in step S14, drawing data for displaying waveform data on the display unit 15 is created with the display magnification calculated in step S15. Next, the drawing data is output to the display circuit 16 in step S16, and the waveform is drawn on almost the entire display area of the display unit 15 as shown in FIG. 3, and the drawing process ends.

In the present invention described above, the waveform displayed on the display unit 15 is the external waveform sampled from the microphone, but is not limited to this, and the sound data stored in the storage means of the electronic musical instrument 1 is not limited thereto. It may be a waveform of a file, or may be waveform data obtained by capturing recorded waveform data from the external device 17 via the communication I / F 18. In addition, each button may be operated by displaying a zoom-in button (Zoom In), a zoom-out button (Zoom Out), and a display button (Display) on the display screen, positioning the cursor, and clicking.
In addition, the waveform which set the start point (S), the start point (L) and the end point (E) of the loop waveform to the waveform of the external sound taken into the electronic musical instrument 1, and the unnecessary part are deleted. The waveform edited in such a manner can be written as voice data on a storage medium provided in the electronic musical instrument 1. The width of the margin provided before the waveform data and the width of the margin provided after the waveform data may be the same width.

It is a block diagram which shows the structure of the electronic musical instrument of the Example of this invention. In the electronic musical instrument of this invention, it is a figure which shows the display mode which displayed the waveform of the external sound sampled and taken in on the display screen of a display part by normal display. In the electronic musical instrument of this invention, it is a figure which shows the display mode of the waveform of the external sound displayed on the display screen of a display part when a display button is pressed down. It is a flowchart of the drawing process which CPU performs in the electronic musical instrument of this invention. In the conventional electronic musical instrument, it is a figure which shows the display mode which displayed the waveform of the external sound sampled and taken in by the normal display on the display screen of a display part. In the conventional electronic musical instrument, it is a figure which shows the display mode of the waveform displayed on the display screen of a display part when a zoom-in button is pressed. In the conventional electronic musical instrument, it is a figure which shows the display mode of the waveform displayed on the display screen of a display part when a zoom out button is pressed down.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electronic musical instrument, 10 CPU, 11 ROM, 12 RAM, 13 Operator, 14 Detection circuit, 15 Display part, 16 Display circuit, 17 External apparatus, 18 Communication interface, 19 External apparatus, 20 Audio | voice interface, 21 Communication bus

Claims (4)

Input means for sampling and capturing external waveforms;
A musical sound generating means capable of generating a musical sound using the external waveform captured by the input means;
In normal display, the external waveform captured by the input means is displayed without being enlarged or reduced, and when the display mode is changed and the display magnification is set , the external waveform is displayed at the set display magnification. Means,
By specifying the position of the start point indicating the start position of the attack waveform and the end point indicating the end position of the waveform to be used on the external waveform displayed on the display means , Setting means for setting as a waveform using the range of the external waveform from the displayed start point to the end point;
Operation means for changing a display mode of the display means;
When the operation means is operated, the waveform of the area from the start point to the end point designated in the external waveform by the setting means is the waveform of the margin area before the start point and the end point. By determining the display magnification displayed over almost the entire display width of the display area in the display means together with the waveform of the later margin area, and setting the determined display magnification in the display means, the display means Display control means for displaying the external waveform from the waveform in the margin area before the start point to the waveform in the margin area after the end point at the determined display magnification;
An electronic musical instrument characterized by comprising: In the display control means, the display magnification is such that the number of samples of the external waveform from the start point to the end point is N _S , the number of dots of the display width of the display area in the display means is N _D , and before the start point. the margin area the number of dots N _MF of the number of dots the margin area after the endpoint when the N _MR, be determined by computing the _{N D / (N S + N} MF + N MR) The electronic musical instrument according to claim 1. Wherein the display control means, the number of samples N _S of the external waveform from the start point to the end point, the number of dots N _D display width of the display area of the display unit, the margin area in front of the start point When the number of dots is N _MF and the number of dots in the margin area after the end point is N _MR , the magnification is calculated by N _D / (N _S + N _MF + N _MR ), and a plurality of fixed numbers prepared in advance are calculated. The electronic musical instrument according to claim 1, wherein a fixed magnification on the zoom-out side closest to the calculated magnification is determined as the display magnification. Computer
Input means to sample and capture external waveforms,
A musical sound generating means capable of generating a musical sound using the external waveform captured by the input means;
In normal display, the external waveform captured by the input means is displayed without being enlarged or reduced, and when the display mode is changed and the display magnification is set , the external waveform is displayed at the set display magnification. means,
By specifying the position of the start point indicating the start position of the attack waveform and the end point indicating the end position of the waveform to be used on the external waveform displayed on the display means , Setting means for setting as a waveform using the range of the external waveform from the displayed start point to the end point;
When an operation for changing the display mode is performed, the waveform in the region from the start point to the end point specified in the external waveform by the setting unit is the same as the waveform in the margin region before the start point and the end point. By determining the display magnification displayed over almost the entire display width of the display area in the display means together with the waveform of the margin area after the point, and setting the display magnification determined in the display means, Display control means for causing the display means to display the external waveform from the waveform in the margin area before the start point to the waveform in the margin area after the end point at the determined display magnification ;
A program for controlling an electronic musical instrument characterized by being made to function as

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