JPH0257319B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a musical score display device that sequentially displays musical scores on a liquid crystal display or the like.

This invention is capable of displaying a musical score suitable for performing while looking at the displayed musical score, and also has a playback mode for displaying such a musical score. An object of the present invention is to provide a musical score display device that has two modes, and that can display a musical score that is easy to read by changing the manner of displaying the musical score depending on the two modes.

According to this invention, when in the recording mode, musical scores are sequentially displayed based on musical score data generated in response to key presses on the keyboard, and the displayed musical scores are moved one measure at a time at the end of each measure,
In addition, in the playback mode, a plurality of bars of music score is displayed at the start of the playback mode based on score data generated from a score data storage means that stores score data in advance, and after that, the displayed score is displayed once at the end of each bar.
The musical score corresponding to the sound played on the keyboard is sequentially displayed in recording mode, and a plurality of measures before and after the measure to be played are displayed in playback mode.

The present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of an electronic musical instrument having a musical score display device according to the present invention. In response to a pressed key, the keyboard 1 generates key information indicating the pressed key and a key-on signal KON indicating the pressed state of the key corresponding to this key information. Note that the key information is pitch information indicating the pitch, and the key-on signal KON is a signal that becomes "1" at a binary level when the key is pressed.

A musical tone forming circuit 2 forms a musical tone signal based on the pitch information generated from the keyboard 1 and the key-on signal KON, and applies this signal to a speaker 4 via an amplifier 3. As a result, speaker 4 is connected to keyboard 1.
Produces the sound corresponding to the key pressed.

Furthermore, the tempo oscillator 5 generates a tempo clock TCL with a frequency corresponding to the set tempo,
This tempo clock TCL is counted by a tempo counter 6 and output as an address signal for the pattern memory 7. Further, the tempo counter 6 outputs a bar pulse mP ₁ every time it counts one bar.

The pattern memory 7 is composed of a read-only memory that stores rhythm patterns corresponding to various rhythms, and designates a rhythm pattern to be read out in accordance with a rhythm selected by a rhythm selection switch (not shown), and controls the tempo counter 6. The rhythm pattern signal RP corresponding to the rhythm pattern is read out according to the address signal output from the. In addition,
The pattern memory 7 is a start signal ST which will be described later.
It becomes operational only when (“1”) is applied to the enable terminal EN.

The rhythm pattern signal RP read out from the pattern memory 7 is applied to the rhythm sound source circuit 8.
The rhythm sound source circuit 8 generates rhythm sound signals representing various rhythm instrument sounds in accordance with the rhythm pattern signal RP, and applies the signals to the speaker 4 via the amplifier 3 to generate rhythm sounds.

On the other hand, the recording mode/playback mode switch 9
The start switch 10 changes the manner of musical score display according to the present invention depending on its operating state.

First, a case where both the changeover switch 9 and the start switch 10 are on will be described. When the changeover switch 9 is turned on, a mode signal R/("1") is output from the changeover switch 9, and the recording mode is set. Also, when the start switch 10 is turned on, a start signal is sent from the start switch 10.
ST (“1”) is output, and a start pulse ΔST is output from the differentiating circuit 11 which takes the differentiation of the rising edge of this start signal ST. Note that the start signal ST is applied to the enable terminal of the pattern memory 7 for the automatic rhythm performance described above, and the start pulse ΔST is used for setting the initial state in the reproduction mode, which will be described later.

Here, of the pitch information and the key-on signal KON generated in response to a key depression on the keyboard 1, the key-on signal KON is applied to the note length detection circuit 12.
The note length detection circuit 12 has a tempo clock TCL added to another input from the tempo oscillator 5, generates note length data of a note by counting the tempo clock TCL added to the key-on time, and counts the tempo clock TCL added to the key-off time. By doing this, the note length data of the rest is generated. Note that this note length detection circuit 12 generates note length data and also generates a note writing pulse signal nP. Further, the note length detection circuit 12 is configured to correct the count value when the count value includes an error, and generate note length data corresponding to the corrected count value. In other words, when the regular count value corresponding to a quarter note is, for example, 32, even if the actual count value does not match the regular count value, such as 30 or 34, the note length data corresponding to the regular count value is It is now being output.

Note length data generated from the note length detection circuit 12 is applied to a note rest information conversion circuit 13 and a measure end detection circuit 14. The note rest information conversion circuit 13 outputs note rest information indicating predetermined notes and rests based on the input note length data, and sends this information together with the pitch information generated from the keyboard 1 to the performance recording memory 15 and the selector. Add to the A input of 16. The measure end detection circuit 14 has an accumulator, and sequentially accumulates the input note length data based on the note writing pulse signal nP, and calculates the value set in advance by a measure length setter (not shown). When the measure length value is reached, the measure pulse mP ₂ is sent to the performance recording memory 15 and selector 17.
Add to the A input of

The performance recording memory 15 receives the mode signal R/
(“1”) is added, so the recording mode is set, and every time the note write pulse signal nP output from the note length detection circuit 12 when detecting the note length is added, the note rest information from the conversion circuit 13 is changed. and pitch information from the keyboard 1, and when a bar pulse _nP2 is output from the bar end detection circuit 14, that pulse is read as bar information.

In addition, since both the selector 16 and the selector 17 have the mode signal R/(“1”) applied to their A input select terminal SA, they select the A input, and the selector 16 selects the note rest information added to the A input. and pitch information to the fourth memory 18, and the selector 17 guides the measure pulse _mP2 applied to the A input to the data transfer control circuit 19.

Since the mode signal R/(“1”) is applied to the fourth memory 18, the note rest information and pitch information added from the selector 16 are read only when the note writing pulse signal nP is applied. 4th memory 18
The information stored in the third memory 20 is transferred to the third memory 20 based on the transfer control signal output from the data transfer control circuit 19 at the end of each bar, and the information stored in the third memory 20 is transferred to the second memory 21 in the same way. The information stored in the second memory 21 is transferred to the first memory 22. That is, the data transfer control circuit 19 first clears the first memory 22 based on the bar pulse mP ₂ applied from the selector 17, transfers information from the second memory 21 to the first memory 22, and then transfers information from the second memory 21 to the first memory 22. to transfer information from the third memory 20 to the second memory 21, then clear the third memory 20 and transfer information from the fourth memory 18 to the third memory 20, and then transfer the information from the fourth memory 18 to the third memory 20. Clear. Note that the above operation is performed at high speed.

The display control circuit 23 includes a fourth memory 18 and a fourth memory 18, respectively.
The note rest information and pitch information stored in the third memory 20, second memory 21, and first memory 22 are read out, and the dot corresponding to a predetermined note and rest is read out based on the read note rest information. In addition to outputting information, the position of dot information corresponding to a note on the staff is controlled based on the pitch information read out at the same time, and a control signal containing this dot information is output to the display 24. Display 2
4 has vertical lines such as a staff, a treble clef, a bar line, and a final line printed in advance on its display surface, and displays the musical score on a liquid crystal display based on the control signal. Note that measure (1), measure (2), measure (3), and measure (4) are separated by vertical lines.
display notes and rests corresponding to the information stored in the first memory 22, second memory 21, third memory 20, and fourth memory 18, respectively.

Figure 2 shows how the musical score is displayed on the display 24 in this recording mode.As is clear from the figure, in measure (4), the notes corresponding to the notes played on the keyboard are displayed in sequence according to the keyboard performance. In other measures, the notes displayed in the measure on the right are shifted and displayed every time one measure ends.

Here, when the start switch 10 is turned off, the start signal ST becomes "0". As a result, the pattern memory 7 becomes inoperable and the automatic rhythm performance is stopped, but the recording and display of the musical score corresponding to the music played on the keyboard continues.

Next, the case where the changeover switch 9 is turned off will be explained. When the changeover switch 9 is turned off, the mode signal R/(“0”) is outputted from the changeover switch 9, and the reproduction mode is entered. That is, the performance recording memory 15 enters a state in which the already recorded musical score data is reproduced by the mode signal R/("0"). Further, both the selector 16 and the selector 17 have a mode signal R/
(“0”) is added, so the B input is selected, and the mode signal R/(“0”) is inverted by the inverter 25 and applied to the AND circuit 26.
The AND circuit 26 is enabled.

When the start switch 10 is turned on in this state, the start signal ST becomes "1" and the differentiating circuit 11 outputs a start pulse ΔST.
The start pulse ΔST is applied to the data transfer control circuit 19 via the tempo counter 6, the performance recording memory 15, and the AND circuit 26. Tempo counter 6 has start pulse ΔST at reset terminal R.
When the start pulse ΔST is applied, the performance recording memory 15 resets the count value, and when the start pulse ΔST is applied, the performance recording memory 15 stores the note rest information and pitch information for three measures from the beginning of the score through the B input of the selector 16 to the fourth memory 1.
Output to 8.

On the other hand, when the start pulse ΔST is applied, the data transfer control circuit 19 transfers note rest information and pitch information for three measures output from the performance recording memory 15 to the fourth memory 18, the third memory 20, and the second memory 20. Each memory is controlled to be transferred to each memory. Note that the fourth memory 18 receives the mode signal R/
(“0”) is added, so input information can be written instantaneously.

Therefore, note rest information and pitch information for three measures output from the performance recording memory 15 are stored in the second memory 21, third memory 20, and fourth memory 18 for each measure.

Next, when the measure pulse mP ₁ is output from the tempo counter 6, this measure pulse mP ₁ is set to the selector 1.
7 to the data transfer control circuit 19 through the B input of the fourth memory 1.
8. Send a transfer control signal to the third memory 20, second memory 21, and first memory 22. Data is thereby transferred between the memories. Also,
When the measure pulse mP ₁ is added, the performance recording memory 15 outputs note rest information and pitch information for one measure to the fourth memory 18 via the B input of the selector 16, and this information is used as new measure information. is stored in the fourth memory as .

FIG. 3 shows the manner in which the musical score is displayed on the display 24 in this reproduction mode. In other words, when displaying a score in the playback mode, three measures of score are displayed in measures 2 to 4 at the same time as the start of the score display, and the displayed score is transferred one measure at a time at the end of each measure, and a new measure of one measure is displayed. The music score will be displayed in measure 4.

This allows the user to play the keyboard while looking at a plurality of measures including the measure to be played. It goes without saying that the bar to be played is bar 2 on the display 24.

Note that the means for recording musical score data in the performance recording memory 15 is not limited to the keyboard performance in the recording mode, and the external recording device 27 may be used. Furthermore, the number of bars displayed on the display is not limited to this embodiment and can be set as appropriate. Furthermore, the staff, treble clef, and vertical lines displayed on the display are not limited to those that are printed in advance, but may be displayed on a liquid crystal display when the power is turned on. Furthermore, the musical score display is not limited to a liquid crystal display, and various displays such as a light emitting diode, electroluminescence, and CRT display are possible.

As explained above, according to the present invention, it is possible to always display a plurality of measures before and after the measure to be played, which has the advantage of making it easier to read the musical score when playing while looking at the displayed musical score. In addition, it is possible to select and use two modes with different display styles: a playback mode that displays the musical score, and a recording mode that sequentially displays the musical scores corresponding to the music played on the keyboard as the keyboard is played. It is possible to provide a musical score display device with high performance.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of an electronic musical instrument having a musical score display device according to the present invention, and FIGS. 2 and 3 are for explaining the display mode of musical scores displayed by this musical score display device. This is the sheet music used for. 1... Keyboard, 2... Musical tone forming circuit, 4... Speaker, 5... Tempo oscillator, 6... Tempo counter, 7... Pattern memory, 8... Rhythm sound source circuit, 9... Recording mode/playback mode Changeover switch, 10...Start switch, 11...Differential circuit, 12...Note length detection circuit, 13...Note rest information conversion circuit, 14...Measure end detection circuit, 15...
...Performance recording memory, 16, 17...Selector, 1
8... Fourth memory, 19... Data transfer control circuit, 20... Third memory, 21... Second memory,
22...first memory, 23...display control circuit, 2
4...Display device, 27...External recording device.

Claims (1)

[Scope of Claims] 1. Sound information storage means for storing pitch information indicating pitch and note length information indicating note length, a plurality of display sound storage means, and storage in the sound information storage means at the start of musical score display. The sound information of two or more measures is transferred to the display sound storage means of the plurality of stages for each measure, and at the end of each measure, the stored information stored in the display sound storage means of each stage is transferred to the display sound storage means of the next stage. information transfer control means for sequentially transferring the sound information for one bar from the sound information storage means to the display sound storage means at the forefront stage; A musical score display device comprising: display means for displaying a musical score based on the musical score. 2. The sound information storage means stores pitch information and sound length information generated in response to key presses on a keyboard, or pitch information and sound length information generated from an external recording device. The musical score display device according to item 1. 3. The musical score display device according to claim 1, wherein the end of the measure is detected by counting tempo clocks generated from a tempo oscillator used for automatic rhythm performance. 4. Sound information storage means for storing pitch information indicating pitch and duration information indicating note length, multi-stage display sound storage means, recording mode/playback mode switching means, and when switched to recording mode. Pitch information and tone length information generated in response to key presses on the keyboard are sequentially stored in the display sound storage means at the forefront of the display sound storage means of the plurality of stages, and each stage of display sound storage is performed at the end of each measure. The storage information stored in the means is sequentially transferred to the next stage display sound storage means, and when the playback mode is switched to and the musical score display starts, two or more measures of sound information stored in the sound information storage means are displayed as measures. Separately, the information is transferred to the plurality of stages of display sound storage means, and each time a bar ends, the stored information stored in the display sound storage means of each stage is sequentially transferred to the display sound storage means of the next stage, and the sound information storage means information transfer control means for transmitting one bar's worth of sound information from the first bar to the display sound storage means at the frontmost stage, and display means for displaying the musical score based on the stored information stored in the display sound storage means at each stage. musical score display device. 5. Claims in which the pitch information generating means stores pitch information and duration information generated in response to key presses on a keyboard or pitch information and duration information generated from an external recording device. The musical score display device according to item 4. 6. The scope of claim 6, wherein the end of the measure is detected by accumulating the note length information in the recording mode, and by counting the tempo clock generated from a tempo oscillator used for automatic rhythm performance in the playback mode. The musical score display device according to item 4.