JP2005316173A - Display device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide new technology that can quickly specify frequency components salient in the differences of output levels and can quantitatively correct the differences when the output levels by every frequency component of playing tones of musical pieces under playing in public performance before the audience are different from the output levels determined at the time of a rehearsal. <P>SOLUTION: The display device has an input means where the sound signals of the playing tones of the musical pieces are inputted, a generation means for analyzing the sound signals at the point of the time the prescribed time elapses from a music top when the music top of the musical piece is instructed and for generating playing data indicating the output level by every frequency component of the playing tones at that point of time, and a display means for acquiring the reference data representing the output level of every frequency component at the point of the time the prescribed time elapses from the music top and for displaying the output level represented by the reference data and the output level represented by the playing data by correlating them with each other for every frequency component. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for grasping an output level for each frequency component of a musical performance sound.

  In a concert or the like, it is common to measure the acoustic characteristics of the venue using pink noise or the like during the rehearsal and adjust the output level of each frequency component in advance. However, since a large number of spectators are seated in the audience at the performance, the acoustic characteristics may differ from the rehearsal when the audience is vacant due to changes in the sound absorption characteristics and temperature changes in the venue. Even if the music is played in such a situation, the output level adjusted during the rehearsal is not reproduced. For this reason, there is a need to adjust the output level again during the performance, and various techniques for responding to such a need have been proposed (for example, Patent Document 1).

JP 09-298433 A

However, in the technique disclosed in Patent Document 1, the degree to which the output level of which frequency component is adjusted is determined based on the audibility and experience of the acoustic engineer who performs the adjustment, so that appropriate readjustment is performed. Cannot be performed quickly, and the performance may not proceed in an appropriate acoustic state, and the degree of adjustment varies depending on the skill of the acoustic engineer.
The present invention has been made in view of the above-described problems, and provides a technique that makes it possible to quantitatively correct the output level of a frequency component that is significantly different from a predetermined output level in a short time. The purpose is that.

In order to solve the above-mentioned problems, the present invention provides an input means for inputting an acoustic signal of a musical performance sound, and a point in time when a predetermined time has elapsed from the beginning of the song when the beginning of the song is instructed. Generating means for generating demonstration data representing an output level for each frequency component of the performance sound at that time, and an output for each frequency component when the predetermined time has elapsed from the beginning of the song Provided is a display device having display means for acquiring reference data representing a level and displaying the output level represented by the reference data and the output level represented by the demonstration data in association with each frequency component.
In order to solve the above-described problem, the present invention provides a computer apparatus having an input unit for inputting an acoustic signal of a performance sound of a music piece, and a predetermined number from the head of the music piece when the head of the music piece is instructed. Analyzing the acoustic signal at the time when the predetermined time has elapsed, and generating means for generating demonstration data representing the output level for each frequency component of the performance sound at that time, and when the predetermined time has elapsed from the beginning of the song A program for obtaining reference data representing an output level for each frequency component and functioning as display means for displaying the output level represented by the reference data and the output level represented by the demonstration data in association with each frequency component is provided. .
According to such a display device and program, for a song being played, the output level of the performance sound when a predetermined time has elapsed from the beginning of the song and the output level represented by the reference data corresponding to that time point Displayed for each frequency component.

In order to solve the above problem, the present invention provides an input means for inputting an acoustic signal of a musical performance sound and a predetermined time from the beginning of the song when the beginning of the song is instructed. Analyzing the acoustic signal at the time of generation, generating means for generating performance data representing the output level for each frequency component of the performance sound at that time, and for each frequency component when the predetermined time has elapsed from the beginning of the song A display device is provided that has display means for acquiring reference data representing the output level of each and displaying the difference between the output level represented by the reference data and the output level represented by the demonstration data for each frequency component.
In order to solve the above-described problem, the present invention provides a computer apparatus having an input unit for inputting an acoustic signal of a performance sound of a music piece, and a predetermined number from the head of the music piece when the head of the music piece is instructed. Analyzing the acoustic signal at the time when the predetermined time has elapsed, and generating means for generating demonstration data representing the output level for each frequency component of the performance sound at that time, and when the predetermined time has elapsed from the beginning of the song A program is provided that obtains reference data representing an output level for each frequency component and functions as display means for displaying the difference between the output level represented by the reference data and the output level represented by the demonstration data for each frequency component.
According to such a display device and program, for the music being played, the output level of the performance sound when a predetermined time has elapsed from the beginning of the music and the output level represented by the reference data corresponding to that time The difference is displayed for each frequency component.

  According to the present invention, it becomes possible to quantitatively grasp a frequency component having a significant difference from the output level represented by the reference data in a short time during the performance, and to correct the frequency component pinpoint. There is an effect that becomes possible. In particular, if the above-mentioned reference data is created during rehearsal for the music piece to be played first in the actual performance, the above correction can be performed immediately after the performance starts.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
[A. Constitution]
FIG. 1 is a diagram illustrating a configuration example of a display device according to an embodiment of the present invention. As shown in FIG. 1, the display device includes an input unit 10, a storage unit 20, a display unit 30, and an analyzer unit 40 to which these components are connected. The input unit 10 is, for example, an input terminal to which a microphone (not shown) is connected. An acoustic signal corresponding to the sound collected by the microphone is input to the input unit 10. In the actual performance, the performance sound of the music performed by the performer is emitted from a speaker (not shown), and after being propagated through the acoustic space formed by the performance venue, the sound is collected by the microphone and corresponds to the performance sound. An acoustic signal is input to the input unit 10.

In the present embodiment, the microphone is installed in the vicinity of a work table (not shown) for an acoustic engineer provided in a passenger seat, and the acoustic engineer has a frequency characteristic of a performance sound and a frequency characteristic during rehearsal. Not only can the difference be confirmed by hearing, but various adjustments can be made while visually confirming the difference between the two. In the present embodiment, the case where the microphone is installed in the vicinity of the work table will be described, but it may of course be installed in another place. For example, it may be installed at several positions such as the second-floor seats and side seats of the performance venue, the characteristics may be confirmed for each position, and adjustment may be performed as necessary.
In the present embodiment, the input unit 10 is input with time data indicating the time elapsed since the performance of the music started. As an example of such time data, there is a time code indicating the performance start timing of each part when the music performance is advanced. Hereinafter, a case where a time code is used as the time data will be described, but it is needless to say that a sound generated at a predetermined time interval such as a clock sound output from a rhythm machine or the like may be used as the time data. . Further, if generation of frequency characteristic data performed by the analyzer unit 40 described later is performed at predetermined time intervals, only the instruction of the beginning of the music may be given from the outside. In short, the time data may be any data that can synchronize performance data with reference data, which will be described later.

  The storage unit 20 is, for example, a hard disk, and stores data serving as a reference when adjusting the output level for each frequency component of the musical performance sound. FIG. 2 is a diagram illustrating an example of the contents stored in the storage unit 20. As illustrated in FIG. 2, the storage unit 20 outputs to the storage unit 20 at the time indicated by the time data in association with the time data. Reference data representing the output level for each frequency component of the performance sound to be played is stored.

  The analyzer unit 40 analyzes the acoustic signal input from the input unit 10 according to a Fast Fourier Transformation (FFT) algorithm and generates frequency characteristic data representing an output level for each frequency component. And operates in one of the following two modes according to the operation content of the acoustic engineer. The first is a reference data generation mode in which frequency characteristic data generated by analyzing an acoustic signal input to the input unit 10 is written as reference data in the storage unit 20 in association with time data input together with the acoustic signal. . Secondly, the output level represented by the frequency characteristic data generated by analyzing the acoustic signal input to the input unit 10 together with the time data is stored in the storage unit 20 in association with the same time data as the time data. This is a comparison display mode in which the output level represented by the reference data is displayed on the display unit 30 in association with each frequency component. Hereinafter, the frequency characteristic data generated by the analyzer unit 40 operating in the comparison display mode is referred to as “demonstration data”. More specifically, in the present embodiment, the analyzer unit 40 operating in the comparison display mode generates the demonstration data and reads the reference data corresponding to the time data from the storage unit 20 to represent the latter. A process of lowering the output level by a predetermined level (6 db in the present embodiment) and superimposing it on the display unit 30 in front of the output level represented by the former is performed. For example, during rehearsal, by operating the analyzer unit 40 in the reference data generation mode, the reference data can be generated and stored in the storage unit 20 for the music played during the rehearsal. On the other hand, at the time of the performance, the analyzer unit 40 is operated in the comparison display mode, so that the difference in frequency characteristics from the rehearsal can be displayed on the display unit 30 for the music played during the performance. it can.

  And the display part 30 is a liquid crystal display and its drive circuit, for example, and displays the image corresponding to the data delivered from the analyzer part 40. FIG. The acoustic engineer described above can quantitatively grasp the difference between the output level represented by the demonstration data and the output level represented by the reference data based on the display content of the display unit 30 for each frequency component.

[B. Operation]
Next, of the operations performed by the display device shown in FIG. 1, operations that clearly show the features will be described with reference to the drawings.

(B-1: Operation in reference data generation mode)
First, the operation performed by the display device when operating in the reference data generation mode will be described with reference to FIG. In the operation example described below, when an acoustic engineer performs an operation to instruct to operate in the reference data generation mode when performing the rehearsal of the music to be played as the first song during the performance, explain. Under such circumstances, when the performance of the music is started, an acoustic signal corresponding to the music is input to the input unit 10 and time data indicating the passage of time since the performance is started. Input to the input unit 10 at predetermined time intervals. Hereinafter, an operation performed by the analyzer unit 40 operating in the reference data generation mode when such an acoustic signal or time data is input will be described with reference to FIG.

  FIG. 3 is a flowchart showing a flow of operations performed by the analyzer unit 40 operating in the reference data generation mode. As shown in FIG. 3, when an acoustic signal is input through the input unit 10 (step SA1), the analyzer unit 40 analyzes the acoustic signal according to an FFT algorithm and generates frequency characteristic data ( In step SA2), the output level for each frequency component represented by the frequency characteristic data is displayed on the display unit 30 (step SA3).

  Next, the analyzer unit 40 determines whether or not a predetermined time has elapsed since the performance of the music was started (step SA4). In the present embodiment, the analyzer unit 40 determines that the predetermined time has elapsed when the time data described above is input to the input unit 10 together with the acoustic signal. The analyzer unit 40 uses the frequency characteristic data generated in step SA2 as reference data only when the determination result in step SA4 is “Yes”, and the reference data and the time data input in step SA1. Are written in the storage unit 20 in association with each other (step SA5).

  Thereafter, the analyzer unit 40 determines whether or not the acoustic engineer is instructed to end the operation of the reference data generation mode (step SA6), and the above-described determination is made until the determination result is “Yes”. The processes after step SA1 are repeatedly executed. As a result, the contents stored in the storage unit 20 are in a state as shown in FIG. As a result, the storage unit 20 stores the reference data for each lapse of a predetermined time from the start of the performance of the music played as the first music during the performance.

(B-2: Operation in comparison display mode)
Next, an operation performed by the display device when operating in the comparative display mode described above will be described with reference to FIG. In the operation example described below, the reference data is stored in the storage unit 20, and an operation for instructing to operate in the above-described comparison display mode at the time of performance of the first song at the performance performance. The case where is performed by an acoustic engineer will be described.

  FIG. 4 is a flowchart showing a flow of operations performed by the display device operating in the comparison display mode. As shown in FIG. 4, the operation in the comparison display mode is different from the operation in the reference data generation mode in that the processes in steps SB5 and SB6 are performed instead of the process in step SA5. Hereinafter, only steps SB5 and SB6, which are different from the operation in the above-described reference data generation mode, will be described.

  In step SB5 of FIG. 4, the analyzer unit 40 reads the reference data stored in the storage unit 20 in association with the same time data as the time data input in step SA1. In step SB6 of FIG. 4, the analyzer unit 40 lowers the output level for each frequency component represented by the reference data by a predetermined amount and then displays the output level of the demonstration data displayed on the display unit 30 in step SA3. Are displayed on the display unit 30 in association with each frequency component.

  FIG. 5 is a diagram illustrating an example of an image displayed on the display unit 30 by the process of step SB6. In the display example of FIG. 5, the output level represented by the demonstration data (the white bar graph in FIG. 5) and the output level represented by the reference data (the black bar graph in FIG. 5) are displayed for each frequency component. ing. In the display example shown in FIG. 5, there is exemplified a case where data representing the center frequency of the frequency band to which the frequency component belongs is displayed in association with a bar graph representing the output level of each frequency component. Of course, for example, data representing the upper and lower frequencies of the frequency band to which the frequency component belongs may be displayed in association with each other. As described above, in the present embodiment, since the output level represented by the reference data is displayed by being lowered by a predetermined level (for example, 6 db), the demonstration data for each frequency component as shown in FIG. If the difference between the output level represented by the reference data and the output level represented by the reference data is the predetermined level, it indicates that the output level adjusted at the time of rehearsal is reproduced in the actual performance for all frequency components. . On the contrary, as shown in FIG. 6, when there is a frequency component in which the difference between the output level represented by the demonstration data and the output level represented by the reference data is larger or smaller than the predetermined level, This indicates that the output level needs to be readjusted.

  For example, in the display example shown in FIG. 6, the output level of the performance sound in the 500 to 600 Hz band is higher than the output level of the reference data. An acoustic engineer who has visually confirmed this, lowers the output level of the frequency component using an acoustic adjustment device such as a parametric equalizer (not shown), and the output level of the music being played is equal to the output level adjusted during the rehearsal. Can be. In the present embodiment, the case where the output level represented by the demonstration data and the reference data is displayed on the display unit 30 as a bar graph has been described. This is because the output level represented by the demonstration data and the output level represented by the reference data change as time passes after the performance of the music starts, so other graphs such as a line graph are used. This is because the difference between the two is displayed more easily than the case. However, it goes without saying that other types of graphs such as a line graph may be used.

As described above, according to the present embodiment, at the actual performance, the output level for each frequency component of the performance sound of the music being played in the first music and the output represented by the reference data created during the rehearsal for that music Whether or not there is a frequency component whose difference from the level is smaller or larger than the predetermined level is visually confirmed from the display content of the display unit 30, and when there is such a frequency component, the output level of the frequency component is It is possible to make a quantitative adjustment according to the difference, and there is an effect that the above adjustment can be performed from the beginning of the performance. In the above-described embodiment, a case has been described in which the reference data is generated for the music played as the first song during the performance. However, the target for generating the reference data is the first song. Needless to say, it is not limited.
In the above-described embodiment, the acoustic engineer visually confirms the difference between the output level represented by the demonstration data and the output level represented by the reference data, and adjusts the output level of the frequency component in which the difference between the two is significant. Although the description has been given of the case where the adjustment is appropriately performed using the apparatus, it is needless to say that a correction unit that automatically corrects when the difference between the two exceeds a predetermined threshold may be provided.
In addition, the control is performed on software that causes a control unit such as a CPU (Central Processing Unit) to execute processing unique to the display device according to the present invention (specifically, processing according to the flowcharts shown in FIGS. 3 and 4). It may be installed in a computer device having a display unit, and may have the same function as the display device, and the software can be distributed over a network or read from a computer device such as a CD-ROM (Compact Disk-Read Only Memory). Of course, it may be recorded on a recording medium and distributed.

[C. Deformation]
Although one embodiment of the present invention has been described above, it goes without saying that such an embodiment may be modified as described below.
(C-1: Modification 1)
In the above-described embodiment, the case has been described in which the reference data for the music played as the first music in the performance is created and stored in the storage unit 20 during the rehearsal. However, the sound signal representing the performance sound of the music played while adjusting the output level at the time of rehearsal is stored in the storage unit 20 as it is, and the sound signal is read at any time during the actual performance and subjected to FFT to perform the above reference. Of course, data may be generated. However, as described in the above-described embodiment, according to the aspect in which the frequency characteristic data for each elapsed time after the performance of the music is started is stored as the reference data, the acoustic signal is stored as it is. There is an effect that the required storage capacity can be reduced as compared with the aspect. Note that the reference data and the acoustic signal are supplied from the outside of the display device according to the present invention (for example, the acoustic signal is recorded on a recording medium such as a CD-ROM and recorded on the recording medium. In the aspect in which the acoustic signal is reproduced and supplied to the display device), the storage unit 20 is not necessarily essential.

(C-2: Modification 2)
In the above-described embodiment, for each elapsed time after the performance of the music is started, the output level represented by the demonstration data that is the frequency characteristic data at that time and the output level represented by the reference data corresponding to the elapsed time. The case where the difference between the former and the latter is quantitatively grasped by associating with each frequency component and lowering the latter by a predetermined level from the former and overlaying and displaying the former has been described. However. Of course, it is possible to raise the output level of the reference data by a predetermined level and display it superimposed on the output level represented by the demonstration data. In addition, the output level represented by the demonstration data may be lowered by the predetermined level and displayed before the output level represented by the reference data, and the output level represented by the demonstration data may be increased by the predetermined level. Of course, it may be displayed superimposed on the output level represented by the reference data. Furthermore, the output level represented by the demonstration data and the output level represented by the reference data may be displayed on the display unit 30 in different colors. By doing in this way, the difference between the former and the latter is displayed in an easily understandable manner. Further, the output level represented by the reference data and the output level represented by the demonstration data may be arranged for each frequency component and displayed on the display unit 30. As shown in FIG. 7, the difference between the former and the latter (FIG. In FIG. 7, it is of course possible to display the hatched portion on the display unit 30. In short, any aspect is acceptable as long as the difference between the output level for each frequency component adjusted during the rehearsal and the output level for each frequency component of the performance sound during the performance is easily displayed. Also good.

It is a block diagram which shows the structural example of the display apparatus which concerns on one Embodiment of this invention. 3 is a diagram illustrating an example of stored contents of the storage unit 20. FIG. It is a flowchart which shows the flow of operation | movement in the reference | standard data generation mode of the display apparatus. It is a flowchart which shows the flow of operation | movement in the comparison display mode of the display apparatus. 4 is a diagram showing an example of an image displayed on the display unit 30. FIG. 4 is a diagram showing an example of an image displayed on the display unit 30. FIG. It is a figure which shows an example of the image displayed on the display part of the display apparatus which concerns on the modification 2. As shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Input part, 20 ... Memory | storage part, 30 ... Display part, 40 ... Analyzer part.

Claims (7)

An input means for receiving an acoustic signal of a musical performance sound;
When the beginning of the song is instructed, the acoustic signal at the time when a predetermined time has elapsed from the beginning of the song is analyzed, and demonstration data representing the output level for each frequency component of the performance sound at that time is generated Generating means for
Reference data representing the output level for each frequency component when the predetermined time has elapsed from the beginning of the song is acquired, and the output level represented by the reference data and the output level represented by the demonstration data are associated with each frequency component A display device. Comprising storage means for storing the reference data when the predetermined time has elapsed from the beginning of the song;
The display device according to claim 1, wherein the display unit reads and acquires the reference data from the storage unit. The display device according to claim 1, wherein the display unit displays the output level represented by the reference data and the output level represented by the demonstration data in different colors. The display means lowers or raises one of the output level represented by the reference characteristic data and the output level represented by the demonstration data by a predetermined level,
When one of the output level represented by the reference data and the output level represented by the demonstration data is lowered by the predetermined level, the lowered one is displayed in front of the other, and conversely, either one is displayed. 4. The display device according to claim 3, wherein, when the level is raised by the predetermined level, the raised side is superimposed on the other side and displayed. An input means for receiving an acoustic signal of a musical performance sound;
When the beginning of the song is instructed, the acoustic signal at the time when a predetermined time has elapsed from the beginning of the song is analyzed, and demonstration data representing the output level for each frequency component of the performance sound at that time is generated Generating means for
Reference data representing the output level for each frequency component at the time when the predetermined time has elapsed from the beginning of the song is obtained, and the difference between the output level represented by the reference data and the output level represented by the demonstration data is determined for each frequency component. And a display device for displaying. Computer equipment,
An input means for receiving an acoustic signal of a musical performance sound;
When the beginning of the song is instructed, the acoustic signal at the time when a predetermined time has elapsed from the beginning of the song is analyzed, and demonstration data representing the output level for each frequency component of the performance sound at that time is generated Generating means for
Reference data representing the output level for each frequency component when the predetermined time has elapsed from the beginning of the song is acquired, and the output level represented by the reference data and the output level represented by the demonstration data are associated with each frequency component A program that functions as a display means for display. Computer equipment,
An input means for receiving an acoustic signal of a musical performance sound;
When the beginning of the song is instructed, the acoustic signal at the time when a predetermined time has elapsed from the beginning of the song is analyzed, and demonstration data representing the output level for each frequency component of the performance sound at that time is generated Generating means for
Reference data representing the output level for each frequency component at the time when the predetermined time has elapsed from the beginning of the song is obtained, and the difference between the output level represented by the reference data and the output level represented by the demonstration data is determined for each frequency component. A program that functions as a display means for display.

Images