JPH06149258A - Waveform display method - Google Patents

Abstract

PURPOSE:To realize the waveform display method which keeps the resolution of a waveform which is displayed at some extent and provide favorite display mode even when the waveform stored in a memory is magnified or reduced displayed. CONSTITUTION:A CPU 2 reads waveform data representing the waveform out of the PCM waveform memory 7. When the waveform is enlarged and displayed on a display device 10, the CPU 2 interpolates the read waveform data to generate interpolated data, and enlarges and displays the waveform. When the waveform is reduced and displayed, the CPU 2 reduced-displays the waveform by thinning out the read waveform data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveform display method for displaying a waveform stored in a memory.

[0002]

2. Description of the Related Art As a device for displaying a waveform stored in a memory, there is one described in Japanese Patent Application Laid-Open No. 51-113653 (hereinafter referred to as a conventional example).

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
It has a function to magnify and display the waveform, but since the waveform is magnified and displayed without any treatment, the displayed waveform becomes coarser than when it is not magnified. Had a problem. An object of the present invention is to provide a waveform display method capable of keeping a resolution of a displayed waveform to some extent and taking a preferable display form even when the waveform stored in a memory is displayed in an enlarged or reduced size. It is to be realized.

[0004]

According to the waveform display method of the present invention, a reading process for reading n (n is a natural number) waveform data from a storage unit for storing waveform data representing a waveform, and this reading process are performed. An output process of converting the read n waveform data into m (m is a natural number different from n) waveform data and outputting the waveform data, and a waveform is displayed based on the waveform data output by this output process. And a display process to perform.

[0005]

First, n (n is a natural number) pieces of waveform data are read out from the storage means for storing the waveform data expressing the waveform. Next, the n pieces of waveform data read by this reading processing are converted into m (m is a natural number different from n) pieces of waveform data and outputted by the output processing. After that, based on the waveform data output in this output process, the display of the waveform is performed in the display process. in this way,
According to the present invention, even when the waveform stored in the memory is displayed in an enlarged or reduced size, it is possible to keep the resolution of the displayed waveform to a certain extent and achieve a preferable display form.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to an embodiment shown in the drawings. FIG. 1 shows the circuit configuration thereof, and reference numeral 1
Is a waveform information processing apparatus, and this waveform information processing apparatus 1
It has a CPU 2 inside. The CPU 2 is composed of, for example, a microprocessor, and controls the entire processing function of the waveform information processing apparatus 1.

The CPU 2 and the bus line BUS
Other devices are connected via. That is, reference numeral 3 is a working memory, which is used when the CPU 2 executes arithmetic processing according to the control program stored in the control ROM 4. That is, the working memory 3 has an area for storing data for a main graphic (MAIN GRA), which will be described later, and a sub graphic (SU).
B GRA), an area for storing data, a cursor position data area for generating data according to the position when the cursor is moved, and various other areas.

Reference numeral 5 is a keyboard for issuing various commands to the CPU 2. Further, in this embodiment, a digitizer 6 is provided as an input device. The digitizer 6 has a manipulator 6-1 that is manually moved on the tablet plane. The manipulator 6-1 further includes a switch 6
-2 is provided. CPU from this digitizer 6
2, the information indicating the position of the operator 6-1 (the position on the XY plane) and the signal indicating whether or not the switch 6-2 is turned on are supplied.

The CPU 2 is also connected to the PCM waveform memory 7. The PCM waveform memory 7 has an area of 32 pages (blocks), for example, and can record digital waveform information representing one to a plurality of waveforms. It should be noted that one of the 32 pages is actually used for the preliminary recording before the trigger signal is applied when the waveform information is recorded.
An area of the page can be used for waveform recording.

The PCM waveform memory 7 can transfer data with a disk 8 (floppy disk or magnetic disk), and can selectively transfer and record a plurality of waveform information.

Further, reference numeral 9 is a display register for recording display data for the display device 10, and the contents thereof are rewritten by the CPU 2.

The display device 10 may be a color CRT or an LCD device capable of color dot matrix display, and various display devices can be used.

The waveform information processing apparatus 1 is connected to an electronic musical instrument 12 via an interface (I / O) 11. The interface 11 is provided in the electronic musical instrument 12.
An interface (I
/ O) 13 and is connected to the CPU 14 via this interface 13. The CPU 14 is composed of, for example, a microprocessor and controls all processes of the electronic musical instrument 12.

A keyboard (KBD) 15 having a plurality of performance keys is connected to the CPU 14, and musical tones corresponding to the operation of the keyboard 15 are generated by the electronic musical instrument 1.
It occurs from 2. That is, the CPU 14 controls the read / write control unit 16 for reading and writing, and at the time of writing, an external sound signal input from the outside is given to the sample hold (S / H) circuit 17, and sampling is performed. Digital signal (PC
M signal) and recorded in the PCM waveform memory 19. Therefore, in the PCM waveform memory 19, the waveform signals from the beginning to the end of the waveform are sequentially sampled and digitally recorded. The memory 19 can also be divided into, for example, 32 pages (blocks), and can record a single waveform information or a plurality of waveform information.

The read / write controller 16 also reads waveform information from the PCM waveform memory 19 at a speed according to the operation of the keyboard 15 at the time of reading, and the D / A converter 20.
After being converted into an analog signal, the sound can be emitted through the amplifier 21 and the speaker 22.

Further, the read / write control section 16 can read the contents of the PCM waveform memory 19, transfer them to the waveform information processing apparatus 1 via the CPU 14 and the interface 13, and finally input and store them in the PCM waveform memory 7. it can. Therefore, the waveform information processing apparatus 1 can perform correction processing based on the waveform information sampled by the electronic musical instrument 12.

On the contrary, the PCM in the waveform information processing apparatus 1
The contents of the waveform memory 7 can be input to the electronic musical instrument 12 via the interface 11, and the PCM waveform memory 1
Can be set to 9.

Next, the display state of the display device 10 will be described with reference to FIG. FIG. 2 shows an initial screen of the display device 10.

In the figure, MENU1 to MENU7 indicate menus (modes) of the arithmetic processing executed by the waveform information processing apparatus 1, respectively.
The processing in the NU7 is simply as follows.

First, the MENU 1 is a mode for inputting a waveform using the digitizer 6, and when this mode is entered, the waveform input is shown on the screen and its contents are input to the PCM waveform memory 7. In the figure, the characters WAVE GEN indicating the wave generator are displayed.

The MENU 2 is a mode for performing graphic processing of waveforms and the like, and in the figure, characters indicating the graphic are displayed as GRAPH. In this mode, waveforms and parameters can be modified and deleted. The details will be described later.

The MENU 3 is a mode for loading waveform information from the disk 8 to the PCM waveform memory 7,
It is displayed as D.

On the contrary, the MENU 4 is a mode in which the waveform information is saved from the PCM waveform memory 7 to the disk 8.
It is displayed as AVE.

The MENU 5 is a mode for inputting waveform information from the PCM waveform memory 19 of the electronic musical instrument 12 to the PCM waveform memory 7 of the waveform information processing apparatus 1, and WAVE IN
Is displayed.

The MENU 6 is a mode for outputting waveform information from the PCM waveform memory 7 of the waveform information processing apparatus 1 to the PCM waveform memory 19 of the electronic musical instrument 12 on the contrary.
It is displayed as OUT.

The MENU 7 is a parameter edit (PARAMETER) for inputting various parameters by numerical values.
EDIT) mode, which is displayed as PRA ED.

Then, by moving the manipulator 6-1 of the digitizer 6, the mouse display unit MOUSE is moved to each M.
By going to the display positions of ENU1 to 7 and turning on the switch 6-2 at that position, that mode is selected and the screen of the display device 10 is changed.

MAP in FIG. 2 is a memory map display showing the state of memory use, and there are 31 MAPs, which indicate the already-stored pages of the PCM waveform memory 7, as will be described later.
It is now blanking. Each waveform can be saved with a name, and the name is displayed in the NAME column. Although FIG. 1 shows the initial state and blanking, a maximum of eight can be displayed. By displaying the NAME and the MAP in the same color and changing the color for each waveform, it is possible to clearly distinguish a plurality of waveforms when they are simultaneously displayed.

Then, when the mouse display unit MOUSE is moved to the LOAD position of the MENU 3 and the switch 6-2 is turned on in the screen of this initial state, the display screen shown in FIG. 3 is obtained.

That is, 10 kinds of waveforms are recorded on the disk 8 now. In other words, what is displayed as DISK in the drawing is the name of the waveform and its page number. For example, the name of the first waveform is "SIN WAVE".
Which uses a storage capacity of two pages.

In FIG. 3, SUBFUNC1 indicates a sub-function for designating the display of the waveform name in the file of the disk 8, and FILE is displayed on the screen. SUBFUNC2 indicates a sub-function for changing the display screen to the next page and is displayed as NEXTP. In addition, SUBFUNC3 indicates a sub-function for making the previous page on the contrary, and is displayed as BEFORP. Further, SUBFUNC4 is a subfunction used when canceling a predetermined transfer, and is displayed as ABORT. SU
BFUNC5 is a sub-function that actually performs transfer, and is indicated as START. Also SUB
FUNC6 is a sub-function that returns to the initial screen and is displayed as RETURN.

By the way, the screen shown in FIG. 3 is moved from the disk 8 to the PC by moving the mouse display unit MOUSE.
This shows that two types of waveform information have already been transferred to the M waveform memory 7. That is, in the waveform name display field NAME, "SINWAVE" and "SIN312" are displayed, and since each waveform has a capacity of 2 pages and 7 pages, a total of 9 MAP display bodies are colored. There is. Now, two of these MAP displays are SINWA
It has the same color as the VE font, and seven are SIN31.
It has the same color as the font of the 2 font.

Further, the display field "F22" of FREE in FIG.
Indicates that 22 pages of the PCM waveform memory 7 are unused.

Therefore, in the state of the screen in FIG. 3, "SINWAVE" and "SINWAVE" are stored in the PCM waveform memory 7.
Information of 9 pages in total of two waveforms “IN312” is transferred from the disk 8.

Next, the mouse display MOUSE is moved to a position for designating the graphic mode of the MENU 2 by operating the operator 6-1 of the digitizer 6, and the switch 6-
Operate 2 to display the waveform graphically.

FIG. 4 shows a display state in this graphic mode. This screen will be described first. The screen in this graphic mode is roughly divided into a main graphic area (shown as MAIN GRA in the figure) and a sub graphic area (shown as SUB GRA in the figure).
And other areas.

This sub-graphic area SUB GR
A (that is, the first display means) displays a whole of the designated waveform, and the waveform data from the PCM waveform memory 7 to the area for storing the data in the main graphic area MAIN GRA of the working memory 3 is displayed. The data of only the specific address is transferred and sent to the display register 9 for display. That is, the sub-graphic area SUBGRA compresses the actual waveform information, that is, extracts and displays the waveform sample points while skipping every predetermined interval.

Then, this subgraphic area SU
Page guide enclosed in a square in B GRA (P in the figure)
It is shown as GUIDE. ) Indicates a range (page) to be enlarged and displayed in the main graphic area MAIN GRA (that is, the second display means).

The size of the page guide PGUIDE is determined by the magnification display area (indicated as MAG in the figure), and the X-axis magnification is designated by X.
mag, which specifies the Y-axis magnification, when Ymag is respectively "X1" and "X1", the waveform information for one page of the PCM waveform memory 7 is directly stored in the main graphic area MAIN GRA. Therefore, the waveform information displayed in the main graphic area MAIN GRA increases as the magnification increases. However, as the magnification is increased, the number of skips increases when the sample points of the waveform are skipped and displayed.

For example, when the X-axis magnification is "X1", the X-axis will be described. When "X1", all sample points are read and displayed, and when "X2", sample point 2 is displayed. One display point (that is, one skip) for each item, one display point (four skips) for four sample points when "X4", and one sample point for eight sample points when "X8". It becomes a display point (that is, 7 skips).

The same applies to the Y-axis, and when the X-axis magnification is fixed, if the Y-axis magnification is increased, the peak value is further compressed. Therefore, even though the crest values of the sample points at different points are actually different from each other, the rate of taking the same position on the screen is high.

The area designated by the page guide PGUIDE changes according to the selection of the magnification. Also, there is "ALL" in the magnification display area MAG, but this is the sub graphic area SUB.
The display of GRA is simply enlarged to display all parts in the main graphic area MAIN GRA.

Therefore, in accordance with the selection of the magnification, the CPU 2
Reads the data of the page of the PCM waveform memory 7, stores it in the data area of the main graphic area and the sub graphic area of the working memory 3, and then transfers it to the digital display register 9 for display on the display device 10.

As shown in FIG. 4, a mouse display MOUSE is displayed in the main graphic area MAIN GRA.
If there is, a cross cursor CAR having that point as an intersection is displayed. Then, a value indicating the position of the cross cursor is displayed in the cursor value display field (shown as CAR VALUE in FIG. 4).

That is, this main graphic area MA
IN GRA is 26.5 msec as shown in FIG.
To +38.6 msec from +2048 to-
Although it is displayed at the level of 2048, the intersection of this cross cursor CAR is at the level of 32.56 msec, 1152.
It is indicated by E. This cursor value display field CA
The value of R VALUE is calculated by the CPU 2 and is stored and displayed in the cursor position data area of the working memory 3. The CPU 2 displays the contents of the above area of the working memory 3 in response to the movement of the mouse display MOUSE. Will be changed.

In this graphic mode, in addition to the above-mentioned subfunction SUBFUNC6, a subfunction for editing waveform information (SUBFUNC7 shown as WAVE ED in the figure)
And a sub-function to edit the parameters (SUBFUNC shown as PAR ED in the figure)
8) The details of each will be described later.

FIG. 5 shows a series of processes executed by the CPU 2 when the graphic mode is entered.
First, in step S1, the mouse display MOUSE is shown at a specified position on the screen in the display device 10 by a signal input from the digitizer 6.

Then, in step S2, the mouse display MOUSE is displayed in the main graphic area MAIN.
It is determined whether or not it is within GRA, and if YES is determined, the process proceeds to step S3, and the cross cursor C described above is used.
While displaying the AR, data indicating the intersection is calculated and displayed in the cursor value display field CAR VALUE.

Then, the process proceeds to step S4. Also, if NO is determined in step S2, this step S
Go to 4.

Step S4 is a normal routine,
The details are shown in FIG. That is, in step N1 of this normal routine, the mouse display unit MOUS
E is displayed on the screen of the display device 10.

Then, in step N2, it is determined whether or not the switch 6-2 provided on the manipulator 6-1 of the digitizer 6 is turned on. If nothing is operated, the process proceeds to step S5 shown in FIG. move on.

If the switch 6-2 of the operator 6-1 is turned on, the process proceeds to step N3 after step N2, and it is determined at which position the mouse display unit MOUSE is located.

When it is detected that the mouse display unit MOUSE is in the magnification display area MAG, step N
4, the CPU 2 performs the processing for changing the magnification. At this time, the area for displaying the designated magnification is displayed in a color different from the other colors, and it becomes clear from the screen which magnification has been selected. If the mouse display MOUSE is in the waveform name display field NAME in step N3, the process proceeds to step N5 following step N3 to read the newly designated waveform information from the PCM waveform memory 7. To run. Then continue with Step N
In step 6, since the whole waveform image must be displayed again, the CPU 2 causes the sub graphic area SUB G
Change the RA display. Further, in step N3,
Mouse display MOUSE is sub graphic area SU
When it is detected that it is in B GRA, the process proceeds to step N7 and the position of the page guide PGUIDE is set to the mouse display M
Move to the position of OUSE, and after that, the waveform information of the page specified by the page guide PGUIDE is displayed on the PC.
It is read from the M waveform memory 7 and stored in a predetermined area in the working memory 3.

If the mouse display MOUSE is located at a position other than the above-mentioned position in step N3, the operation proceeds to step N8 as non-operation. Further, after the processing of steps N4, N6 and N7 described above is completed, the process proceeds to step N8.

In step N8, the waveform data already rewritten in the working memory 3 to change the display of the main graphic area MAIN GRA is transferred to the display register 9 and displayed on the display device 10.

After the completion of the processing of step N8,
The process proceeds to step S5 of the flow shown in FIG. In step S5, the mouse display MOUSE is at a position for displaying the subfunctions SUBFUNC6 to SUBFUNC8, and the switch 6 of the operator 6-1 of the digitizer 6 is present.
Judge whether -2 is turned on.

If nothing is operated, the operation returns to step S1 as non-operation. Also SUBF
If it is detected that the switch 6-2 is operated at the position of UNC7, the process proceeds to step S6, the wave edit process is executed, and then the process returns to step S1. Also SU
If it is detected that the switch 6-2 is turned on at the position of BFUNC8, the process proceeds to step S7, and then returns to step S1. When it is detected that the switch 6-2 is operated at the position of the SUBFUNC 6, the initial state is set, and the screen of the display device 10 becomes as shown in FIG.

Next, referring to FIG. 7, a screen in the wave edit will be described. When the operator 6-1 of the digitizer 6 is moved, the cross cursor CAR moves in the main graphic area MAIN GRA as described above. Then, the switch 6-2 provided on the operator 6-1
When is turned on and off once, the X axis of the cross cursor CAR is fixed at the value of the X axis at that point, and the value of the Y axis when turned on and off next is input as the amplitude value.

If the operator 6-1 is moved on the tablet while the switch 6-2 is kept on, a new amplitude value is continuously input in accordance with the operation and the display state is changed.

FIG. 7 shows a state in which a part of the waveform is rewritten in this way. The display magnification is "X1"
If not, the rough data is stored in the PCM waveform memory 7, so interpolation is performed. That is, linear interpolation is performed from the values of two points that have been input, and when the X-axis magnification is "X2", one point is in the middle, when "X4" is three points in the middle, and "X8". At this time, the amplitude values at seven points are calculated in the middle to be used as waveform information.

Furthermore, at the time of this wave edit, a new subfunction SUBFUNC other than the above is provided.
9 and 10 are displayed. This subfunction SUB
FUNC9 is the main graphic area MAIN G
The content displayed in the sub graphic area SUB GRA is rewritten by designating after editing the content of the RA. In addition, subfunction SU
When BFUNC10 is designated, the graphic mode as shown in FIG. 4 is restored.

FIG. 8 shows a processing flow of such a wave edit, which is jumped from step S6 of FIG.

Then, in step W1, the mouse display MO
The position of USE is determined by the signal from the digitizer 6,
Display it on the screen and proceed to the next step W2. That is, step W2 is the normal routine shown in FIG. 6, and after the series of processes described above, the process proceeds to step W3. That is, when it is determined to be off in step N2 of FIG. 6 and after the processing of step N8 is completed, step W
Jump back to 3.

At step W3, the mouse display unit MOUS is displayed.
If E is in the main graphic area MAIN GRA, the process proceeds to step W4 if NO, and if sub-function SUBFUNC9 is designated, the process proceeds to step W5 and the sub-graphic area SUB.
The GRA is caused to display the waveform information stored in the PCM waveform memory 7.

Subfunction other than that, that is, SUB
When FUNC6 to 8 and SUBFUNC10 are specified,
The process jumps to step S1 shown in FIG. 5 to execute each process. When the mouse display MOUSE is located at a position other than the sub-function, the operation is not performed and the process returns to step W1.

If YES is determined in the above step W3, the process proceeds to the next step W6. Step W6
Then, the cross cursor CAR is displayed in the main graphic area MAIN GRA, and the position information of the intersection of the cross cursor CAR is displayed in the cursor value display field CAR VALUE.

Then, in the next Step W7, the operator 6
It is judged whether the switch 6-2 of -1 has been turned on. If it is not turned on, the process returns to step W1 again. If NO is determined in step W7, the process proceeds to the next step W8, the mouse display MOUSE is displayed again, and the process proceeds to the next step W9, in which the switch 6-2 of the operator 6-1 is continuously turned on. If it is detected that it is in the OFF state, the process proceeds to step W10 to determine the position of the mouse display unit MOUSE, and
The CPU 2 reads the value of the X axis at that time and fixes the display of the X axis of the cross cursor CAR. Then, in step W11, it is determined whether or not the switch 6-2 of the operator 6-1 has been turned on.

If it is not turned on again, the process returns to step W10 to determine and display the position of the mouse display unit MOUSE according to the operation of the operator 6-1. At this time, the Y-axis of the cross cursor CAR moves, but the X-axis remains fixed as described above.

When it is detected in step W11 that the switch 6-2 has been turned on, the flow advances to step W12 to read the Y-axis value of the cursor, and set the data as CP.
U2 stores and rewrites the contents of the display register 9 so as to be displayed on the display device 10 as a new waveform sample point.

In this way, when the switch 6-2 is turned on and off once, the position (X coordinate) on the X axis of the mouse display unit MOUSE is stored and the address to be rewritten is determined.

Then, by the on / off operation of the switch 6-2, the position on the Y axis (Y coordinate) indicated by the mouse display MOUSE is stored as the amplitude value of the waveform.
Correct the waveform shape.

When it is determined in step W9 that the switch is in the on state, the process proceeds to step W13 and the mouse display M
After determining the OUSE display position, the process proceeds to step W14 to detect whether the switch 6-2 is in the ON state, and if it is in the ON state, the process proceeds to step W15 to store the X and Y axis values designated by the mouse display MOUSE. Then, it is displayed on the screen as a new waveform sample point.

Then, the process proceeds to step W13. In this way, step W1 is performed until the switch 6-2 is turned off.
Repeat steps 3 to W15 to continuously change the waveform shape on the main graphic area MAIN GRA. When it is detected in step W14 that the switch 6-2 has been turned off, step W16 is performed next.
Go to. After step W12, step W1
Go to 6.

In step W16, the crest value obtained by the above-described processing is interpolated according to the display magnification as described above, and transferred and stored in the PCM waveform memory 7.

When the process of step W16 is completed, the process returns to step W1 and the same process is performed thereafter to edit the waveform.

Next, the operation at the time of parameter editing in step S7 shown in FIG. 5 will be described. FIG. 9 shows one display state of the screen at that time. That is, at the time of this parameter edit, the subfunction SUBFUN
The parameters indicated by C11 to C14 can be input while moving the mouse display MOUSE on the main graphic area MAIN GRA.

First, these SUBFUNC 11 to 14
GEN ST means a general start, and designates from which point of the waveform stored in the PCM waveform memory 7 the reading is started when the musical tone is actually generated. GEN ED
Means the general end, and on the contrary, it specifies at which point the reading is finished. Further, a start address and an end address for repeatedly reading a specific section for generating a continuous tone are REP START which means repeat start and REP ED which means repeat end.

At the time of this parameter editing,
When the mouse display MOUSE is moved to each sub-function position and the switch 6-2 is turned on, the position becomes different in color, and in that state, the mouse display MOUSE is moved to the main graphic area MAI.
When the switch 6-2 is moved to N GRA and then the switch 6-2 is operated at an appropriate point, a cursor indicating the position is displayed.

That is, the above subfunction SUBFU
For NC11, a long GST line is displayed on the screen, and for subfunction SUBFUNC12, a long GED line is entered, and subfunction S
For the UBFUNC13, a short RST line is displayed on the screen, and for the subfunction SUBFUNC14, a short RED line is displayed on the screen. The distinguishability can be improved by making the colors of the lines GST and GED different from the colors of the lines RST and RED.

These displays are also made in the sub-graphic area SUB GRA, and the horizontally long rectangular mark REP is displayed at the repeated portion.

In this way, while observing the waveform displayed on the display device 10, sound generation starts, end, or repeat start,
Since the end position can be specified, for example, the point where the waveform level is zero, that is, the point that intersects with the X axis, that is, the zero-cross point is set to the specified position as described above, so that noise such as click sound is reliably prevented. You can do it.

FIG. 10 shows a processing flow of the CPU 2 at the time of this parameter editing, and step S of FIG.
7 are details.

First, in step P1, the normal routine shown in FIG. 6 is executed, and then the process jumps back to step P2. Then, in this step P2, the subfunctions SUBFUNC6 to 8 and 10 described above are used.
It is detected whether 14 is designated. If nothing is operated, the process returns to step P1. If the subfunctions SUBFUNC11 to 14 are specified, step P
Proceed to 3 and other subfunctions SUBFU
If NC is designated, the flow returns to the graphic mode flow shown in FIG.

Then, when the operation proceeds to step P3, the position of the mouse display is first determined and displayed according to the position of the operator 6-1 of the digitizer 6. In the next step P4, it is judged whether or not the mouse display unit MOUSE is in the main graphic area MAIN GRA, and if there is, the process proceeds to step P5 where the cross cursor CAR is generated and the cursor value display field CAR VA.
Cause the LUE to display its position. If step P4
If NO is determined in step S1, the process returns to step P1.

Then, following step P5, the CPU 2
Executes step P6, and switches 6 of the operator 6-1.
Judge whether or not -2 was turned on. If there is no operation, the process returns to step P1, but if the on operation is performed, the process proceeds to step P7 and the mouse display unit MOUSE
The position specified by, that is, the position of the intersection of the cross cursor CAR is stored, and the address specified by any of general start, end, repeat start, and end is set, and the main graphic area MAIN is set.
The GRA and the sub graphic area SUB GRA are caused to perform corresponding displays. Then, after step P7, step P1 is executed, and similarly, each parameter is input while visually recognizing the waveform.

Next, the operation when the parameter edit mode of the MENU 7 is designated will be described.

FIG. 11 shows a display state of the display device 10 in the parameter edit mode. VOL in the figure
UME is a volume display unit, and by moving the mouse display body, the display body of the volume knob moves and the level changes greatly. There are up / down switch displays UPSW and DOWNSW, and mouse display M
Bring OUSE to that position, and operate it 6-1.
By turning the switch 6-2 on and off, the value of the parameter changes little by little in the up or down direction.

TOTALPARA is a parameter display field for displaying the overall parameters of the musical sound.
VEPAR is a parameter display field related to the waveform information of a musical sound, and after specifying which parameter of these display fields to set with the mouse display MOUSE,
Move the mouse display unit MOUSE to the position of the volume display unit VOLUME or the up / down switch display units UPSW and DOWNSW described above, and move the operator 6-1.
The value of the parameter can be digitally input by performing the operation (1) and turning on the switch 6-2.

That is, the display of each parameter, for example, "MAS
Next to "TER TUNE", the value "56" of the parameter will be displayed. In this way, the level of each parameter can be input only by operating the operator 6-1.

The processing of the load mode (MENU3), the graphic mode (MENU2) and the parameter edit (MENU7) has been described above in detail. The CPU2 also performs predetermined processing according to the control information stored in the control ROM 4 for other modes. Yes, but omit the details.

Although one embodiment of the present invention has been described in detail above, according to this embodiment, the main graphic area MAIN GRA and the sub graphic area SUB G are provided.
The RA is divided into an enlarged view of the main part of the waveform and an overall view of the waveform, so that it is possible to easily grasp and correct the waveform and set parameters. Further, a cursor value display field C for displaying the level and time of the position designated at the intersection of the cross cursor CAR
Since the AR VALUE is provided, it is possible to instantly understand the peak value and the time of the input parameter.

The main graphic area MAIN
Since the GRA display magnification can be changed variously, it is very effective for waveform recognition, correction, parameter display, zero-cross point detection, and the like.

The main graphic area MAIN
When the GRA display magnification is increased and the waveform is modified, the CPU 2 automatically interpolates the waveform to generate appropriate waveform data, so there is no erroneous operation, and the address can be taken in detail. Waveform information can be input.

Further, in the above-mentioned embodiment, in addition to the waveform display, general start, end, repeat start,
Since each position of the end is displayed, the input error of each parameter can be prevented, and the position of each parameter can be understood visually.

In addition, the parameter edit (MENU
In the case of 7), since the volume display section VOLUME and the up / down switch display body UP / DOWNSW are displayed, there is no input error when inputting each parameter,
Moreover, digital input is possible without operating the numeric keypad, which is convenient.

In the above embodiment, one screen has 2 screens.
Although one display area, that is, a main graphic area and a sub graphic area are provided to perform display, they may be displayed as separate display panels.

Further, in the above embodiment, the waveform information processing device and the electronic musical instrument are constructed separately, but it is of course possible to construct them integrally.

[0098]

As described above, according to the present invention,
Even when the waveform stored in the memory is enlarged or reduced and displayed, the resolution of the displayed waveform can be kept to some extent and a preferable display form can be obtained.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of an embodiment.

FIG. 2 is a diagram showing an initial display state of a display device.

FIG. 3 is a diagram showing a display state of a display device in a load mode.

FIG. 4 is a diagram showing a display state of a display device in a graphic mode.

FIG. 5 is a flowchart showing a process in a graphic mode.

FIG. 6 is a flowchart of a normal routine.

FIG. 7 is a diagram showing a display state of the display device during wave editing.

FIG. 8 is a flowchart showing a process at the time of wave editing.

FIG. 9 is a diagram showing a display state of the display device at the time of parameter editing.

FIG. 10 is a flowchart showing a process at the time of parameter editing.

FIG. 11 is a diagram showing a display state of the display device in a parameter edit mode.

[Explanation of symbols]

 1 Waveform Information Processing Device 2 CPU 3 Working Memory 4 Control ROM 6 Digitizer 6-1 Operator 6-2 Switch 7 PCM Waveform Memory 8 Disk 9 Display Register 10 Display Device 12 Electronic Musical Instrument 19 PCM Waveform Memory

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location G06F 15/72 360 9192-5L G09G 5/36 8121-5G H03B 28/00 B 9182-5J (72 ) Inventor Shigenori Morikawa 32-1 Sakaemachi, Hamura-shi, Tokyo Casio Computer Co., Ltd.

Claims (5)

[Claims] 1. A reading process for reading n (n is a natural number) waveform data from a storage unit for storing waveform data expressing a waveform, and n waveform data read by this reading process is m.
(M is a natural number different from n) Output processing for converting and outputting to a plurality of waveform data, and display processing for displaying a waveform based on the waveform data output by this output processing. Waveform display method. 2. The natural numbers n and m have a relationship of n> m, and the display process is a process of reducing and displaying the waveform stored in the storage means. The waveform display method described in 1. 3. The output process is a process of thinning out the n waveform data read in the reading process and converting the waveform data into m waveform data for output. Waveform display method described. 4. The natural numbers n and m have a relationship of n <m, and the display process is a process of enlarging and displaying a waveform stored in the storage means. The waveform display method described in 1. 5. In the output processing, the n waveform data read in the read processing are subjected to interpolation calculation to obtain the n data.
5. The waveform display method according to claim 4, which is a process of converting one piece of waveform data into m pieces of waveform data and outputting the data.