JP2017175322A - Setting method for acoustic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable even a user of low skill to easily perform setting of acoustic equipment in accordance with a use style of a speaker.SOLUTION: Two sound signals from a waveform input part are supplied to a route control a40. One configuration data is selected in response to a selecting operation of a user. The selected configuration data includes type information indicating what kind of speaker is to be connected. Speakers corresponding to the configuration data are narrowed down from among multiple speakers, and the user selects one speaker from among the narrowed-down speakers. The selected configuration data and preset corresponding to the selected speaker are applied to SP signal processing parts 43a and 43b.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a setting method for an audio device such as a power amplifier that can be easily set in accordance with a use form of a speaker.

Conventional power amplifiers that do not have a signal processing function are equipped with an equalizer and filter in order to make the speaker sound optimally, and a speaker processor that equalizes the characteristics of the sound emitted from the speaker and creates the sound. There was also a usage to connect to the previous stage.
An example of the speaker processor is shown in Non-Patent Document 1. This speaker processor includes components of various functions for speaker adjustment, such as an equalizer and a delay, and the user changes the parameters of each component to adjust the effect of signal processing. If the speaker processor is adjusted well, it is possible to apply optimum processing to various speakers.

Yamaha Corporation SPEAKER PROCESSOR SP2060 Owner's Manual [online], [Search January 27, 2016], Internet <http://download.yamaha.com/api/asset/file?language=en&site=countrysite-master. prod.wsys.yamaha.com & asset_id = 47915>

  There are two types of speaker systems: a full-range system that covers the entire audible band, and a subwoofer that is in charge of only the low band in the audible band. In addition, among the whole-range systems, there is a system that includes a low-frequency speaker and a high-frequency speaker and has a dedicated input terminal for each speaker and that can be connected to a bi-amplifier. In addition, each speaker system has sound characteristics peculiar to the same system. For example, the frequency bandwidths that can be output are different, or the output sound pressure level and allowable input power within the bands are different. Moreover, a plurality of speaker systems may be used in combination. The user should use a speaker processor to adjust the output signal of each channel (ch) of the power amplifier to characteristics suitable for the speaker system connected to that channel. In addition, the user should appropriately set a signal path or the like in the speaker processor in accordance with the use form of the speaker.

  However, there is a problem that it is difficult for a low-skilled user or a beginner to set a signal path and parameter values of each component in the speaker processor in accordance with the usage pattern and speaker characteristics.

  Therefore, an object of the present invention is to provide a method for setting an acoustic device such as a power amplifier that can be easily set in accordance with a use form of a speaker even for a low-skilled user.

In order to achieve the above object, a method for setting an audio device according to the present invention is a method for setting an audio device including a signal processing unit connected to an n input unit and an n output unit, where n is an integer of 1 or more. A first step of preparing a plurality of configuration data, a second step of preparing a plurality of presets corresponding to a plurality of speakers, and one of the plurality of configuration data according to a user's selection operation. A third step of selecting configuration data; a fourth step of extracting speakers corresponding to the selected configuration data from the plurality of speakers; and selecting one speaker from the extracted speakers. The fifth step received from the user, the selected configuration data, and the preset corresponding to the selected speaker are used for the sound signal processing performed by the signal processing unit. It is the most important; and a sixth step of use.
The present invention can be implemented in an arbitrary manner such as a system and an apparatus, in addition to being implemented as a method as described above.

  In the method for setting an audio device of the present invention, first, one piece of configuration data is selected from a plurality of pieces of configuration data in accordance with a user's selection operation. Next, a speaker corresponding to the selected configuration data is extracted from the plurality of speakers, and the user selects one speaker from the extracted speakers. Then, the selected configuration data and the preset corresponding to the selected speaker are applied to the signal processing performed by the signal processing unit. Each configuration data contains information on what type of speaker to connect, and by narrowing down the choices of the speaker based on that type, the user can easily make settings that match the usage pattern of the speaker. Can do.

It is a block diagram which shows the structure of the power amplifier 1 which is one Embodiment of the setting method of this invention. 2 is a diagram illustrating an operation panel of a power amplifier 1. FIG. 3 is a block diagram of signal processing of a digital signal processing unit 21 of the power amplifier 1. FIG. 4 is a block diagram of SP signal processing 43 of the digital signal processing unit 21. FIG. It is a figure which shows the connection in route control a, b of the digital signal processing part 21. FIG. 3 is a table for explaining an amplifier mode of the power amplifier 1; It is an example of an icon of an output composition displayed by power amplifier setting processing concerning the present invention, and an example of an icon of amplifier mode. It is a figure which shows the flowchart of the configuration wizard process which concerns on this invention, and the display screen displayed at each process step.

Hereinafter, embodiments for carrying out the present invention will be specifically described with reference to the drawings.
First, FIG. 1 is a block diagram showing a configuration of a power amplifier 1 which is one embodiment of the setting method of the present invention.
The power amplifier 1 in FIG. 1 basically has a 2-channel configuration of Ach (A channel) and Bch (B channel), and is connected by a bus 24 to a CPU (Central Processing Unit) 10, a flash memory 11, and a RAM ( Random Access Memory) 12, other I / O 13, operator 14, display 15, waveform input unit 20, digital signal processing unit 21, D / A / A / D unit 22, and analog power amplification unit 23. Yes. The digital signal processing unit 21 described above is composed of one or more DSPs (Digital Signal Processors).

  Among these, the CPU 10 is a control means for comprehensively controlling the operation of the power amplifier 1, and by executing a control program stored in the memory 11, parameters can be edited according to the operation of the operator 14, 15 or the signal processing of the digital signal processing unit 21 is controlled. The flash memory 11 is a rewritable nonvolatile memory, and stores a plurality of configuration data, a plurality of SP presets corresponding to a plurality of speakers, and the like in addition to the control program. One of the plurality of configuration data is specified in an amplifier mode to be described later, and each configuration data defines a sound signal path from the input unit to the output unit and signal processing in the path. The RAM 12 is a volatile memory in which the CPU 10 writes and reads various data, and is used as a work memory of the CPU 10 and a current memory that stores a plurality of parameters for controlling the current operation of the amplifier 1. The other I / O 13 is an interface for communicating by connecting various external devices. Any other standard such as Ethernet (trademark), USB (Universal Serial Bus), etc. can be adopted as a standard used for communication in the I / O 13, and wired wireless is not an issue. The display 15 is a display unit that displays various information according to the control of the CPU 10, and is configured by, for example, a liquid crystal panel (LCD) or a light emitting diode (LED).

  The configuration of the path from the sound signal input unit to the output unit will be described. The waveform input unit 20 receives two sound signals (inputs, analog Ach and Bch) from the external source 2 via the two input terminals of the amplifier 1. Signal) is converted into a digital sound signal and supplied to the digital signal processing unit 21. The digital signal processing unit 21 performs signal processing such as crossover processing, delay processing, equalizer processing, limiter processing, and dynamics processing on the two digital sound signals, and converts the processed two sound signals to D / A. Output to A / D unit 22. The D / A / A / D unit 22 converts the two digital sound signals into analog sound signals and supplies them to the analog power amplifier 23. The analog power amplifier 23 power-amplifies each of the two analog sound signals, and outputs the power-amplified Ach and Bch sound signals (output signals) to the one or two speakers 3 connected to the speaker terminals.

  The configuration of the operation panel of the power amplifier 1 is shown in FIG. As shown in FIG. 2, a rectangular display 15 is provided at the upper center of the operation panel, and a seesaw-type power switch 31 is provided at the lower left side. On the right side of the switch 31, an Ach knob 30a for controlling the gain of the Ach sound signal and an Ach button 30b on which “A” is written are arranged vertically, and on the right side there are a menu key (Menu) 30c and a return key 30d. Arranged side by side. Further, a rotary encoder with a push switch (hereinafter referred to as “encoder”) 30e on the right side, a Bch knob 30f for controlling the gain of the Bch sound signal on the right side, and a Bch button 30g on which “B” is written Placed in. A power lamp (POWER) and a warning lamp (ALERT) are arranged above the power switch 31, and a first lamp (PL1) is located above the Ach button 30b, and a second lamp (PL2) is located above the Bch button 30g. Be placed. When the user operates the Ach knob 30a or the Bch knob 30f, the CPU 10 controls the Ach or Bch signal gain in the amplifier 1 in accordance with the amount of operation. In FIG. 2, a home screen that mainly displays the current gains of Ach and Bch is displayed on the display 15.

Next, FIG. 3 shows a block diagram of signal processing executed by the digital signal processing unit 21. The upper arrow is Ach, and the lower arrow is Bch.
As shown in this figure, the two sound signals Ach and Bch from the waveform input unit 20 are supplied to a route control a block denoted by reference numeral 40. In the route control a, one of DUAL / PARALLEL / SUM shown in FIG. 5A is connected according to the input configuration selected by the user. (a1) In DUAL, the supplied Ach sound signal is output as an Ach sound signal, and the supplied Bch sound signal is output as a Bch sound signal. (a2) In PARALLEL, the supplied Ach sound signal is output as two sound signals Ach and Bch. (a3) In SUM, the supplied two sound signals of Ach and Bch are mixed, and the sum sound signal is output as two sound signals of Ach and Bch. The two sound signals Ach and Bch from the route control a are respectively supplied to two IN signal processing 41a and 41b that perform input side processing. In the IN signal processing 41a and 41b for each channel, a plurality of blocks connected in series are connected. (Multi-band comp, delay, etc.) apply common signal processing to the supplied sound signal regardless of the speaker connected to each channel. A parameter set used for signal processing by each block of the IN signal processing unit is initially set to a predetermined value when configuration data to be described later is applied.

  The Ach and Bch sound signals output from the IN signal processing 41a and 41b are supplied to the route control b block denoted by reference numeral 42. In the route control b, one of the DUAL / PARALLEL / SINGLE connections shown in FIG. 5B is made according to the input configuration selected by the user. (b1) In DUAL, the supplied Ach sound signal is output as an Ach sound signal, and the supplied Bch sound signal is output as a Bch sound signal. (b2) In PARALLEL, the supplied Ach sound signal is output as two sound signals Ach and Bch. (b3) In SINGLE, the supplied Ach sound signal is output as an Ach sound signal, and a silent sound signal is output as a Bch sound signal. The two sound signals Ach and Bch from the route control b are supplied to two SP signal processes 43a and 43b that perform signal processing in accordance with the speaker 3 connected to each channel. FIG. 4 shows a block diagram of an example of signal processing of the SP signal processing 43a and 43b. As shown in this figure, the SP signal processing 43a, 43b is composed of a plurality of blocks including a cascaded crossover 50, a delay 51, an equalizer (EQ) 52, and a limiter 53. The parameter set used by each block of the SP signal processing unit is initialized based on an amplifier mode and an SP preset described later when the configuration data is applied.

  There are various types of speakers 3 connected to the power amplifier 1, and combinations thereof are various. For example, there is a type that covers the entire audible band from low to high (FULL: full range system), a type that covers the low range in the audible band (SUB: subwoofer), and some of the wide range systems are low. There is a type (BI-AMP: bi-amplifier) that has a high-frequency speaker terminal and a high-frequency speaker terminal. These types of speakers are used in appropriate combinations according to the purpose of use. The input configuration and output configuration of the digital signal processing unit 21 are set according to the type and usage of the speaker 3 connected to the amplifier 1. The [output configuration] is set by the user in accordance with the type of the one or two speakers 3 connected to the two output terminals of the Ach and Bch of the amplifier 1 and the usage form thereof. Then, according to the set [output configuration], the configuration of each of the two sound signals output by the amplifier 1 (which type of speaker sound signal) is determined. [Input configuration] is based on whether the input signals of a plurality of channels of the amplifier 1 are all used, only a part thereof, or whether the input signals are mixed when using all. Is set, and according to the set [input configuration], the configuration of the sound signal received by the amplifier 1 (the number of input signals to be used) and the configuration of the sound signal received by each processing block in the digital signal processing unit 21 (which channel) Input signal or mixed signal).

Based on the set output configuration and input configuration, an amplifier mode that defines what speaker 3 is connected to the power amplifier 1 and what signal is input is determined. In the power amplifier setting method according to the present invention, the user first selects one output configuration, then selects an input configuration from the narrowed candidates, and based on the selected output configuration and input configuration. One amplifier mode is selected.
A table of amplifier modes shown as a matrix of a plurality of output configurations and a plurality of input configurations as options is shown in FIG. This table has a row in which six output configurations are arranged and a column in which five input configurations are arranged. There are 30 selection frames (cells) in the table, and it is possible to set an amplifier mode in each selection frame. However, in the present invention, the amplifier mode which is not necessary is omitted, and the number of options is limited. For example, it is limited to 15 modes. One of the 15 amplifier modes is selected based on the output configuration and input configuration selected by the user. Explaining each output configuration option, [FULL + FULL] is one type of speaker system (entire system) that covers the entire audible band at the two output terminals of Ach and Bch of amplifier 1 (total system). 2 units) Output configuration to be connected. This speaker system is not limited to 1 way but may be 2 way or 3 way. In this case, a sound signal in the entire audible band is supplied from the amplifier 1 to each speaker system.

[SUB + SUB] is an output configuration in which one (sub-woofer) type speaker system (subwoofer) responsible for the low frequency range of the audible frequency is connected to the two output terminals of Ach and Bch of amplifier 1 one by one (total of two). is there. When the corresponding configuration data is applied, a low frequency sound signal is supplied from the amplifier 1 to each speaker system.
[FULL + SUB] is an output configuration in which a FULL type speaker system is connected to the Ach output terminal of the amplifier 1 and a SUB type speaker system is connected to the Bch output terminal of the amplifier 1. When the corresponding configuration data is applied, the FULL type speaker system is supplied with a sound signal in which the low frequency band of the entire audible band is cut from the amplifier 1, and the SUB type speaker system is supplied with the low frequency sound signal. Is supplied.

[BI-AMP] provides a bi-amp connectable speaker system (BI-AMP type), and the amplifier 1's Ach output terminal has a high-frequency speaker terminal for the BI-AMP type speaker system. This is an output configuration in which the low-frequency speaker terminal of the BI-AMP type speaker system is connected to the Bch output terminal of the amplifier 1 to drive the bi-amplifier. When the corresponding configuration data is applied, a low-frequency sound signal is supplied from the amplifier 1 to the high-frequency speaker terminal, and a low-frequency sound signal is supplied to the low-frequency speaker terminal. Is supplied.
The [FULL (BOOST)] is connected to the Ach output terminal of the amplifier 1 by connecting one FULL type speaker system and using the total power that can be supplied by the analog power amplifier 23 for Ach power amplification. This is an output configuration that drives one speaker system more powerfully. By making the Bch output of the amplifier 1 a silent signal and loosening the restrictions on the Bch output protection circuit, one loudspeaker system can be sounded louder than when two loudspeaker systems are connected (Boost operation) ). When the corresponding configuration data is applied, a sound signal in the entire audible band is supplied to the Ach speaker system from the amplifier 1, and even if a speaker is connected to Bch, a silent sound signal is supplied to the speaker system. There is no sound.
[SUB (BOOST)] is an output configuration in which a single SUB type speaker system is connected to the Ach output terminal of the amplifier 1 and the entire power is used for Ach power amplification to drive the speaker system strongly. is there. Similarly to the above, one loudspeaker system is sounded with a louder sound (Boost operation).

Next, the input configuration specified by the user will be described. In [Input 2ch, All stages 2ch], the user inputs two independent sound signals to Ach and Bch of the amplifier 1, and the amplifier 1 is set according to the corresponding configuration data. Is an input configuration in which the Ach input signal is processed by the IN signal processing 41a and the SP signal processing 43a, and the Bch input signal is processed by the IN signal processing 41b and the SP signal processing 43b.
In [Input 1ch, All stages 2ch], the user inputs one sound signal to Ach of the power amplifier 1, and according to the corresponding configuration data, the amplifier 1 converts the Ach input signal into the IN signal processing 41a and the SP signal. This is an input configuration in which processing 43a and IN signal processing 41b and SP signal processing 43b perform parallel processing.
[Input 1ch, latter 2ch], the user inputs one sound signal to the Ach of the amplifier 1, and the amplifier 1 uses the corresponding configuration data to process the input signal of the Ach by the IN signal processing 41a. This is an input configuration in which processed sound signals are processed in parallel by SP signal processing 43a and 43b.
[Input 1ch, 1ch for all stages] is an input configuration for Boost operation. The user inputs one sound signal to Ach of the amplifier 1, and the amplifier 1 receives the input signal of Ach by the corresponding configuration data. , An input configuration for processing by the IN signal processing 41a and the SP signal processing 43a.
[Input 2ch, mixed] is an input configuration for Boost operation, and the user inputs two independent sound signals to Ach and Bch of the amplifier 1, and the amplifier 1 inputs two inputs according to the corresponding configuration data. An input configuration that mixes signals and applies IN signal processing and SP signal processing to the sum sound signal in a manner similar to the input configuration of [input 1ch, ** ("*" is a wild card)] described above. It is. In this case, the path of the IN signal processing and the SP signal processing is uniquely determined according to the [output configuration].

  Referring to the amplifier mode table in FIG. 6, when one of the output configurations is first selected by the user, the input configuration is limited by the selected output configuration, and only that input configuration can be selected. For example, when the user selects [FULL + FULL], any input configuration of [input 2 ch, all stages 2 ch] [input 1 ch, all stages 2 ch] [input 2 ch, mixed] can be selected. Next, when the user selects one of the selectable input configurations, the amplifier 1 selects one amplifier mode corresponding to the selected output configuration and input configuration, and sets configuration data corresponding to that mode. This is applied to the digital signal processing unit 21. For example, when [input 2ch, all stages 2ch] is selected, the mode 1 amplifier mode is selected. In the amplifier 1 in mode 1, the route control a is set to (a1) DUAL, the Ach input signal is processed by the IN signal processing 41a, and the Bch input signal is processed by the IN signal processing 41b. Then, the route control b is set to (b1) DUAL, the sound signal processed by the IN signal processing 41a is processed by the SP signal processing 43a, and the sound signal processed by the IN signal processing 41b is processed by the SP signal processing 43b. Is done. The settings of the route control a and the route control b are collectively indicated by “(a1, b1)” (FIG. 6). When this configuration data is applied, the parameter set of each block of the SP signal processing 43a and 43b is selected by the user according to the selected configuration data of mode 1 and the speaker 3 connected to the outputs of Ach and Bch. An initial setting value is set based on two SP presets corresponding to a FULL type two-speaker system (two [FULL]). In this mode 1, sound signals in all audible frequency bands that have been subjected to signal processing suitable for the two connected speakers 3 are output from the Ach and Bch of the amplifier 1.

  The memory 11 stores a plurality of configuration data corresponding to a plurality of amplifier modes. Each configuration data includes setting of route control a and b, speaker information designating each type of two speakers to be connected to Ach and Bch, and processing for determining the type of processing performed in each block of two SP signal processing It includes information and defines the path of the sound signal from the input section to the output section of the digital signal processing section 21 and the signal processing in that path. That is, by applying the configuration data according to the amplifier mode to the digital signal processing unit 21, the operation of the power amplifier 1 in the amplifier mode is realized.

By the way, the speaker 3 connected to each output of the power amplifier 1 includes types such as FULL, SUB, and BI-AMP. The speaker 3 connected from the amplifier 1 has the frequency characteristics and phase characteristics of the speaker 3. By supplying a sound signal that is adjusted in accordance with the power and limited in power according to the allowable input of the speaker 3, the performance of the speaker 3 can be sufficiently extracted. Therefore, when the amplifier mode is selected, the amplifier 1 applies a parameter set (multiple parameters) to each block of the SP signal processing 43a (43b) based on the SP preset selected by the user according to the speaker 3 connected thereto. Initial setting. The SP preset for each speaker is a parameter set prepared for the speaker by the manufacturer of the speaker, such as a parameter for flattening frequency characteristics, a parameter indicating delay time, a parameter indicating allowable input, The recommended cut-off frequency is included.
Here, the signal processing of each block of each SP signal processing of FIG. 4 will be described. The crossover 50 extracts a low-frequency sound signal or a high-frequency sound signal from the input sound signal based on the designated cutoff frequency according to the combination of the connected speakers 3. The configuration data of the selected amplifier mode specifies whether the high frequency or low frequency is extracted from the sound signal at the crossover 50 of each channel and output, or the sound signal is output as it is. For example, when the output configuration of [FULL + SUB] or [BI-AMP] is specified by the user, the cutoff frequency is determined based on the SP preset selected by the user, and the Ach input signal is set to a low frequency at the cutoff frequency. Are output from Ach and Bch respectively. The EQ 52 is an equalizer that adjusts the frequency characteristics of the sound signal, and is used here to flatten the frequency characteristics of the sound emitted from the connected speaker 3. The EQ 52 may be used to make a sound close to a desired frequency characteristic. The limiter 53 limits the level of the sound signal so that the power value of the output from the analog power amplifier 23 does not exceed the specified limit value. The limit value is set according to the power that can be output from the analog power amplifier 23 and the allowable input of the connected speaker 3. During BOOST operation, the limit value is relaxed to enable high output. The delay 51 delays and outputs the sound signal by a designated delay time. In general, it is used to align the phases of sound emitted from a plurality of speakers 3, but in the case of [FULL + SUB] and [BI-AMP] in particular, a high frequency speaker and a low frequency speaker are used. Used for phase alignment.

  For example, when the user selects an output configuration of [FULL + FULL] and an input configuration of [input 1 ch, all stages 2 ch], the amplifier 1 selects the corresponding mode 2 and the configuration data of mode 2 is sent to the digital signal processing unit 21. Applies to Thereby, (a2, b1) is set in the route control a, b. That is, the route control a is set to (a2) PARALLEL, and the route control b is set to (b1) DUAL. At this time, the parameter sets of the SP signal processing 43a and 43b are initially set based on the configuration data of mode 2 and the two SP presets of the two FULL type speaker systems (two [FULL]) selected by the user. A set value is set. Sound signals in the entire audible band subjected to signal processing (flattening of frequency characteristics, phase control, power limitation, etc.) suitable for the two connected [FULL] type speakers 3 are sent from the Ach and Bch of the amplifier 1. Is output.

  When the user selects [FULL + FULL] and [input 2ch, mixed], the amplifier 1 selects the corresponding mode 3, and applies the configuration data of mode 3 to the digital signal processing unit 21. (A3, b1) is set in the route control a, b, and the parameter set of the SP signal processing 43a, 43b is the configuration data of mode 3 and two SP presets of two [FULL] selected by the user. Initialized based on.

  When the user selects an output configuration of [FULL + SUB] and an input configuration of [input 1 ch, subsequent stage 2 ch], the amplifier 1 selects the corresponding mode 8 and applies the configuration data of mode 8 to the digital signal processing unit 21. (A1, b2) is set in the route control a, b, and the parameter set of the SP signal processing 43a, 43b is the mode 8 configuration data and the two SP presets [SUB] and [FULL] selected by the user. Based on the above, an initial setting value is set. The SUB type speaker 3 ([SUB]) connected to the Ach of the amplifier 1 further receives a low-frequency sound signal extracted from the Ach input signal based on the cutoff frequency at the Ach crossover 50. The FULL type speaker 3 ([FULL]) output after being subjected to signal processing suitable for the speaker 3 and connected to the Bch of the amplifier 1 is connected to the Bch of the amplifier 1 based on the cutoff frequency at the Bch crossover 50. The high frequency sound signal extracted from the input signal is output after further signal processing suitable for the speaker 3 is performed. Here, the cut-off frequencies for extracting the high frequency and low frequency sound signals should be matched. The amplifier 1 determines one cut-off frequency based on two SP presets [FULL] and [SUB] selected by the user. For example, if the recommended cutoff frequency of the [FULL] SP preset is lower than the recommended cutoff frequency of the [SUB] SP preset, increase the [FULL] cutoff frequency and increase the [SUB] (recommended) cutoff frequency. If the recommended cutoff frequency of the [FULL] SP preset is higher than the recommended cutoff frequency of the [SUB] SP preset, raise the [SUB] cutoff frequency and set the [FULL] (recommended) It is better to match the cutoff frequency.

  When the user selects an output configuration of [SUB + SUB] and an input configuration of [input 2 ch, all stages 2 ch], the amplifier 1 selects the corresponding mode 4 and applies the configuration data of mode 4 to the digital signal processing unit 21. . (A3, b1) is set in the route control a, b, and the SP signal processing 43a, 43b parameter set applies the configuration data of mode 4 and the two SP presets of the two [SUB] selected by the user. Is done. The [SUB] type speaker 3 connected to the Ach of the amplifier 1 outputs a low-frequency sound signal extracted from the Ach input signal based on the cutoff frequency suitable for the speaker 3 at the crossover 50. The [SUB] type speaker 3 connected to the Bch of the amplifier 1 outputs a low-frequency sound signal extracted from the Bch input signal based on the cutoff frequency suitable for the speaker 3 at the crossover 50. Is done. As the cutoff frequency of each channel, the recommended cutoff frequency included in the SP preset selected for that channel is used.

  When the user selects the output configuration of [BI-AMP] and the input configuration of [input 1ch, rear 2ch], the amplifier 1 selects the corresponding mode 10 and applies the configuration data of mode 10 to the digital signal processing unit 21. To do. (A1, b2) is set in the route control a, b, and the parameter set of each block of the SP signal processing 43a, 43b is one of the configuration data of mode 10 and the [BI-AMP] type selected by the user. An initial setting value is set based on one SP preset corresponding to the speaker system. The low-frequency speaker terminal of the BI-AMP type speaker 3 connected to the Ach of the amplifier 1 outputs a low-frequency sound signal extracted based on the cutoff frequency by the Ach crossover 50, and the amplifier A high-frequency sound signal extracted based on the cut-off frequency at the Bch crossover 50 is output to the high-frequency speaker terminal of the speaker 3 connected to one Bch. In the [BI-AMP] SP preset, the cut-off frequencies for extracting the high-frequency and low-frequency sound signals are the same (one), and are set to the two crossovers 50 as they are.

  When the user selects [BI-AMP] and [input 2ch, mixed], the amplifier 1 selects the corresponding mode 11 and applies the configuration data of mode 11 to the digital signal processing unit 21. (A3, b2) is set in the route control a, b, and the parameter set of the SP signal processing 43a, 43b is the configuration data of mode 11 and one SP preset of [BI-AMP] selected by the user. Based on this, an initial set value is set.

  When the user selects an output configuration of [FULL (BOOST)] and an input configuration of [input 1 ch, all stages 1 ch], the amplifier 1 selects mode 12 and applies the configuration data of mode 12 to the digital signal processing unit 21. To do. (A1, b3) is set in the route control a, b, and the parameter set of the block of the SP signal processing 43a is the configuration data of mode 12 and the SP preset of the [FULL] type speaker system selected by the user. Based on this, an initial set value is set.

FIG. 8 shows a flowchart of the configuration wizard process of the power amplifier 1 according to the present invention and a display screen displayed at each processing step.
When the user presses the menu key (Menu) 30c on the panel, the CPU 10 causes the display 15 to display the [MENU] screen of << a >>. On this [MENU] screen, when the user turns the encoder 30e on the panel to move the cursor in the screen to [CONFIG WIZARD] and pushes the encoder 30e, the CPU 10 starts this configuration wizard process. Thus, the push switch of the encoder 30e functions as an enter key. Further, due to the rotation of the encoder 30e, the cursor moves on one screen and the parameter value changes on another screen. When a certain character has an icon, the character is displayed as a black character with a white background. When a character does not have an icon, the character is displayed as a white character with a black background. In addition, each selection screen described below displays a check column for each option, and the check column for the most recently selected option is checked. When the configuration wizard process is started, the CPU 10 displays the [SP TYPE] screen of << b >> on the display unit 15 in step S10. On the [SP TYPE] screen, the user can temporarily select one of the six output configurations by moving the cursor while scrolling by turning the encoder 30e. In the right part of the screen, an icon (FIG. 7A) corresponding to the temporarily selected output configuration is displayed. Once the desired output configuration is selected, the user pushes the encoder 30e to confirm the selection of the output configuration. The CPU 10 checks the rectangular check box of the output configuration, and proceeds to step S11 ([NEXT]).

  In step S11, the CPU 10 displays the [ROUTING] screen of << c >> on the display unit 15. On the [ROUTING] screen, the input configuration limited according to the output configuration selected in step S10 is displayed, and the user moves the cursor to temporarily select one of them. For example, when [FULL + FULL] is selected in step S10, [IN: 2CH ALL: 2CH] (input 2ch, all stages 2ch), [IN: 1CH ALL: 2CH] (input 1ch, all stages 2ch), [ Three input configurations are displayed: IN: 2CH MIX] (input 2ch, mixed). Once the desired input configuration is selected, the user pushes the encoder 30e to confirm the selection of the input configuration. On the right side of the screen, one amplifier mode icon (FIG. 7B) corresponding to the selected output configuration and the temporarily selected input configuration is displayed. The CPU 10 checks the rectangular check box of the input configuration, and proceeds to step S12 ([NEXT]). When the user presses the return key 30d during the process of step S11, the CPU 10 returns to the previous process (S10) ([BACK]) and executes the output configuration selection process again.

  The icon of each amplifier mode displayed here (FIG. 7B) includes text of the input configuration and output configuration of the amplifier mode, and a schematic diagram of processing in the amplifier mode. In the example of << c >>, since [FULL + FULL] is selected and [IN: 2CH ALL: 2CH] is temporarily selected, the corresponding [Mode 1 (a1.b1)] icon is displayed. In step S12, the CPU 10 selects one amplifier mode (for example, mode 1) corresponding to the selected output configuration and input configuration, and proceeds to step S13.

  In step S13, the CPU 10 first causes the display 15 to display the [SP SERIES] screen of << d >>. The [SP SERIES] screen of << d >> displays the target channel, the type of speaker to be connected to that channel in the selected amplifier mode, and the speaker system product that matches that type as selection candidates. The Since one SP preset is stored in the memory 11 corresponding to each product, selection of one product here can be regarded as selection of one corresponding SP preset. Also, if all the products that match one type are displayed on this screen, the number of users is too large for the user to choose, so here, first, the product series and then the individual product in two stages. Selects one product. In the example of the [SP SERIES] screen of Ach shown in << d >>, the target channel is [A], the speaker type [FULL], and [A], [CBR], including [FULL] type products as selection candidates 3 series of [Club V] and [<GENERIC>] and [<FLAT>] indicating general products are displayed. Here, the user moves the cursor to temporarily select any one of those series or general products. When the desired series or general product is provisionally selected, the user pushes the encoder 30e to confirm the selection of the series or general product. The CPU 10 checks the corresponding rectangular check box and proceeds to the next process in step S13 ([NEXT]). In << d >>, the [CBR] series is selected. If the user presses the return key 30d during the above process, the CPU 10 returns to the previous process (S11) ([BACK]) and can execute the input configuration selection process again.

In the next process in step S13, the CPU 10 causes the display 15 to display the [SP MODEL] screen of << e >>. On the [SP MODEL] screen of << e >>, the target channel [A], the speaker type [FULL] of the target channel, and the products corresponding to the [FULL] type in the selected [CBR] series are displayed. . Here, the user moves the cursor to temporarily select one of these products. When the desired product (SP preset) is selected, the user pushes the encoder 30e to confirm the selection of the product (SP preset). The CPU 10 checks the corresponding rectangular check box, and when the selected configuration data specifies the Bch speaker type in addition to Ach (mode 1 to mode 9), the next processing in step S13 If only the Ach speaker type is designated (mode 10 to mode 15), the process proceeds to step S14. When the user presses the return key 30d during the above process, the CPU 10 returns to the previous process ([BACK]) and executes the series selection process again. When the Ach speaker type of the selected configuration data is [FULL], only [FULL] type products (SP presets) are displayed as selection candidates on the Ach [SP MODEL] screen. Also, when the Ach speaker type is [SUB], only [SUB] type products are displayed on the same screen as [BI-AMP], and only [BI-AMP] type products are displayed as selection candidates. The
Although not shown in the figure, when the speaker type of Bch is the same as that of Ach in the next processing in step S13, the CPU 10 displays a screen asking the user whether or not to select the product selected in Ach also in Bch. 15 is displayed. If the response is made when the user selects, the CPU 10 selects the same product (SP preset) as Ach in Bch, and proceeds to step S14. Here, when the user responds that the selection is not made, or when the speaker type of Bch is different from Ach, the CPU 10 selects one series from the user on the [SP SERIES] screen of Bch as in the case of Ach described above. Next, selection of one product (SP preset) is received from the user on the [SP MODEL] screen. When the user presses the return key 30d during each selection process, the CPU 10 returns to the previous selection process ([BACK]) and executes the previous selection process again. Then, when the selection of the Ach and Bch SP presets is completed, the CPU 10 proceeds to step S14.

  In step S14, the CPU 10 includes the setting of the route control a and b and the parameter set of the SP signal processing 43a and 43b based on the configuration data of the selected amplifier mode and the selected 1 or 2 SP preset. Determine one configuration plan (multiple parameter values). Then, the CPU 10 causes the display 15 to display the [CONFIRMATION] screen of << f >> including the determined setting plan. The user turns the encoder 30e, scrolls the setting plan in the [CONFIRMATION] screen, and confirms each parameter value. If there is no problem, the user pushes the encoder 30e and instructs application. As a result, the CPU 10 proceeds to step S15 ([APPLY]). If there is any problem, the user operates the return key 30d, and the CPU 10 returns to the previous process (S13) ([BACK]), and the Ach or Bch SP preset selection process performed immediately before. Run again.

  In step S15, the CPU 10 sets each parameter value of the setting plan determined in step S14 as an initial value in a parameter set such as route control a and b, SP signal processing 43a and 43b, and performs signal processing thereof. Apply a configuration plan. When the parameter value setting is completed, the CPU 10 displays a [CONFIG WIZARD] screen including [EXECUTED!] On the display unit 15 to notify the user that the setting of the power amplifier 1 is completed. For example, when mode 1 is selected and [CBR12] is selected for chA and chB, the Ach of amplifier 1 outputs a sound signal that has been subjected to signal processing suitable for CBR12 on the Ach input signal and amplified in power. Then, the Bch of the amplifier 1 outputs a sound signal obtained by performing signal processing suitable for the CBR 12 on the Bch input signal and amplifying the power. Here, when the user pushes the encoder 30e ([OK]), the CPU 10 ends the configuration wizard process, and the CPU 10 causes the display 15 to display the home screen of << h >>. On this home screen, the Ach and Bch products (for example, [CBR12]) selected by the most recent configuration wizard process are displayed together with the current gains of Ach and Bch. In the home screen of FIG. 2 before execution of the configuration wizard process, different products ([SW115V]) are displayed for Ach and Bch. Each parameter value set based on the setting plan is not a fixed value and can be individually adjusted by a user on another screen (not shown).

  By applying the setting plan in the configuration wizard processing, each block of the digital signal processing unit 21 performs signal processing corresponding to the selected amplifier mode (configuration data) and the selected product (SP preset). For example, in the SP signal processing 43 for a channel in which one [FULL] type product is selected regardless of the mode, a parameter set is set based on the SP preset corresponding to that product. Similarly, the SP preset of the [SUB] product is applied to the SP signal processing 43 of the channel for which a certain [SUB] product is selected. When any of modes 7 to 9 is selected and a [FULL] product and a [SUB] product are selected, the SP is based on the two SP presets of the [FULL] product and the [SUB] product. A cutoff frequency in the crossover 50 of the signal processing 43 is determined.

  The user can adjust the parameter values of the IN signal processing 41 a and 41 b and the SP signal processing 43 a and 43 b using the user interface of the amplifier 1. For example, when the user turns the Ach knob 30a, the CPU 10 changes the gain of Ach. Moreover, the edit screen of the crossover 50 can be entered, the cutoff frequency can be selected, and the value can be changed by the encoder 30e.

Although the embodiment according to the present invention described above is a 2ch power amplifier, the present invention can also be applied to acoustic devices other than 2ch, for example, acoustic devices such as 4ch and 8ch. In that case, two channels may be paired, and the method of the present invention may be applied to each pair, or a group may be formed by three or more channels and the method of the present invention may be applied to each group. The power amplifier setting method of the present invention is not limited to the power amplifier, and is applied to various acoustic devices connected to the front stage of the power amplifier, such as a speaker processor and a stage box for extending the input / output of the digital mixer. it can. Further, when signal processing is performed for only one channel, Ach is used, but Bch may be used. In modes 7 to 11, the low frequency band is processed by Ach and the high frequency band is processed by Bch.
In the above description, there are six output configuration options, but it is not necessary to limit to six. For example, only three of [FULL + FULL], [SUB + SUB], and [FULL + SUB] in the table of FIG. 6 may be used. Also, the input configuration options need not be limited to the embodiment. In the present invention, the number of modes to be selected may be smaller than the product of the number of output configurations and the number of input configurations.
In the embodiment according to the present invention described above, the output configuration and the input configuration limited according to the output configuration are presented to the user, the user is allowed to specify the output configuration and the input configuration, and the specified output configuration and input configuration are specified. The present invention is characterized in that a limited amplifier mode is presented to the user and one of the amplifier modes is selected. In addition, the amplifier mode selected by the user includes information on what kind of speaker is connected to the power amplifier, so that SP presets that can be selected in the amplifier mode are narrowed down.

1 power amplifier, 2 external source, 3 speaker, 10 CPU, 11 flash memory, 12 RAM, 13 other I / O, 14 operator, 15 display, 20 waveform input unit, 21 digital signal processing unit, 22 D / A A / D section, 23 analog power amplifier section, 24 bus, 30a Ach knob, 30b Ach button, 30c menu key, 30d return key, 30e rotary encoder, 30f Bch knob, 30g Bch button, 31 power switch, 40 route control a, 41a, 41b Signal processing, 42 Route control b, 43a, 43b Signal processing, 50 Crossover, 51 Delay, 52 EQ, 53 Limiter

Claims (8)

When n is an integer of 1 or more, a method for setting an audio device including a signal processing unit connected to an n input unit and an n output unit,
A first step of preparing a plurality of configuration data;
A second step of preparing a plurality of presets corresponding to a plurality of speakers;
A third step of selecting one configuration data from among a plurality of configuration data according to a user's selection operation;
A fourth step of extracting a speaker corresponding to the selected configuration data from the plurality of speakers;
A fifth step of receiving from the user a selection of one of the extracted speakers;
A sixth step of applying the selected configuration data and the preset corresponding to the selected speaker to the sound signal processing performed by the signal processing unit;
A method for setting an audio device, comprising: Each of the plurality of configuration data specifies a type of n speaker connected to the n output unit,
The method for setting an audio device according to claim 1, wherein in the fourth step, a speaker of a type specified by the configuration data is extracted from the plurality of speakers.   The acoustic device setting method according to claim 2, wherein the plurality of configuration data designates a global system or a low-frequency system as the type.   The audio device setting method according to claim 3, wherein the plurality of configuration data includes configuration data designating a bi-amplifier as the type.   The plurality of configuration data respectively define a sound signal path from the n input section to the n output section in the signal processing section and a sound signal processing of a processing block in the path. The method for setting an audio device according to any one of claims 2 to 4. The plurality of configuration data specify the crossover operation of the processing block,
6. The method for setting an audio device according to claim 5, wherein the cut-off frequency of the crossover is determined based on a preset corresponding to the speaker selected in the fifth step.   7. The method for setting an audio device according to claim 1, wherein the preset corresponding to the speaker selected in the fifth step includes an equalizer parameter for flattening a frequency characteristic of the speaker. .   The method for setting an audio device according to claim 1, wherein the preset corresponding to the speaker selected in the fifth step includes a parameter indicating an allowable input of the speaker.