JP6665617B2 - How to set up audio equipment - Google Patents

Description

  The present invention relates to a setting method of an audio device such as a power amplifier, which can easily perform setting according to a usage mode of a speaker.

Conventional power amplifiers without signal processing functions are equipped with equalizers and filters inside the speaker for optimal sounding of the speaker, and a speaker processor for equalizing the characteristics of the sound emitted from the speaker and creating sound. There was also a usage to connect to the previous stage.
Non-Patent Document 1 shows an example of the speaker processor. The speaker processor includes components of various functions for speaker adjustment, such as an equalizer and a delay, and a user changes a parameter of each component to adjust an effect of signal processing. By properly adjusting the speaker processor, various speakers can be optimally processed.

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

  Speaker system types include a full-range system that covers the entire audible band, and a subwoofer that is responsible for only the low band in the audible band. In addition, among all-range systems, there is a system that includes a low-range speaker and a high-range speaker, and has a dedicated input terminal for each speaker, and is connectable to a bi-amplifier. Further, each speaker system has a sound characteristic unique to the system even if it is the same type of system. For example, the output frequency bandwidth may be different, or the output sound pressure level and the allowable input power within that band may be different. Also, 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. Further, the user should appropriately set the signal path and the like in the speaker processor according to the usage mode of the speaker.

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

  Therefore, an object of the present invention is to provide a method of setting an audio device such as a power amplifier, which enables a user with a low skill to easily perform setting according to a usage form of a speaker.

In order to achieve the above object, a method of setting a power amplifier according to the present invention is a method of setting an audio device having 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 receiving a selection of one output configuration from a plurality of output configurations from a user, and an input restricted by the selected output configuration. A third step of receiving a selection of one input configuration from the configuration from the user, and selecting one of the plurality of amplifier modes based on the selected output configuration and the selected input configuration. The most main feature of the present invention is to include a fourth step of selecting, and a fifth step of selecting configuration data according to the selected amplifier mode and applying the selected data to signal processing performed by the signal processing unit. That.
The present invention can be implemented in any mode, 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 according to the present invention, first, a user selects an output configuration (which is easy to understand), and then the user selects one input configuration from input configurations restricted by the selected output configuration. And one amplifier mode is selected from the plurality of amplifier modes based on the selected output configuration and input configuration, and the configuration data corresponding to the selected amplifier mode is transmitted to the signal processing unit. It is applied to the signal processing to be performed. After the user first selects the output configuration relatively easily, and then selects the input configuration from the narrowed options, it is possible to easily perform the setting according to the usage form of the speaker.

FIG. 1 is a block diagram illustrating a configuration of a power amplifier 1 that is one embodiment of a setting method according to the present invention. FIG. 3 is a diagram illustrating an operation panel of the power amplifier 1. FIG. 3 is a block diagram of signal processing of a digital signal processing unit 21 of the power amplifier 1. 3 is a block diagram of an SP signal processing 43 of the digital signal processing unit 21. FIG. FIG. 3 is a diagram showing connections in route control a and b of the digital signal processing unit 21. 3 is a table for explaining an amplifier mode of the power amplifier 1. 7A and 7B are an example of an output configuration icon and an example of an amplifier mode icon displayed in the power amplifier setting process according to the present invention. FIG. 3 is a diagram illustrating a flowchart of a configuration wizard process according to the present invention and a display screen displayed in each processing 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 of FIG. 1 basically has a two-channel configuration of Ach (A channel) and Bch (B channel), and is connected to a CPU (Central Processing Unit) 10, a flash memory 11, a RAM ( Random Access Memory 12, other I / O 13, operator 14, display 15, a waveform input unit 20, a digital signal processing unit 21, a D / A / A / D unit 22, and an analog power amplification unit 23. I have. The above-described digital signal processing unit 21 includes one or more DSPs (Digital Signal Processors).

  The CPU 10 is a control unit that controls the operation of the power amplifier 1 in a centralized manner. By executing a control program stored in the memory 11, the CPU 10 edits parameters according to the operation of the operation unit 14, 15 and the signal processing of the digital signal processing unit 21. 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 a plurality of configuration data is specified in an amplifier mode described later, and each configuration data defines a path of a sound signal from an input unit to an 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 for storing a plurality of parameters for controlling the current operation of the amplifier 1. The other I / O 13 is an interface for connecting various external devices to perform communication. Other standards used for communication in the I / O 13 may be any standards such as Ethernet (trademark) and USB (Universal Serial Bus), and may be wired or wireless. The display 15 is a display unit that displays various information under 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 input section of the sound signal to the output section will be described. The waveform input section 20 receives two analog Ach and Bch sound signals (inputs) from the external source 2 via the two input terminals of the amplifier 1. Signals), and converts them into digital sound signals and supplies them 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 performs D / A processing on the two processed sound signals. -Output to the A / D unit 22. The D / A / A / D unit 22 converts each of the two digital sound signals into an analog sound signal and supplies the analog sound signal to the analog power amplifier 23. The analog power amplifier 23 power-amplifies the two analog sound signals, and outputs the power-amplified Ach and Bch sound signals (output signals) to one or two speakers 3 connected to the speaker terminals.

  FIG. 2 shows the configuration of the operation panel of the power amplifier 1. As shown in FIG. 2, a rectangular display 15 is provided at the upper center of the operation panel, and a seesaw power switch 31 is provided at the lower left. 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 vertically arranged, and on the right side thereof, a menu key (Menu) 30c and a return key 30d are arranged horizontally. Are arranged side by side. Further, a rotary encoder with push switch (hereinafter referred to as "encoder") 30e on the right side thereof, a Bch knob 30f for controlling the gain of the Bch sound signal and a Bch button 30g on which "B" is written are vertically provided on the right side thereof. Placed in A power lamp (POWER) and a warning lamp (ALERT) are arranged above the power switch 31, a first lamp (PL1) above the Ach button 30b, and a second lamp (PL2) 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 signal gain of the Ach or Bch in the amplifier 1 according to the operation amount. In FIG. 2, a home screen mainly displaying 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, two sound signals of Ach and Bch from the waveform input unit 20 are supplied to a block of a route control a indicated by reference numeral 40. In the route control a, one of the DUAL / PARALLEL / SUM connections shown in FIG. 5A is performed 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 sound signal of Ach is output as two sound signals of Ach and Bch. (a3) In the 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 of Ach and Bch from the route control a are respectively supplied to two IN signal processes 41a and 41b for performing input side processing. In the IN signal processes 41a and 41b of each channel, a plurality of blocks connected in series are provided. (Multiband comp, delay, etc.), common signal processing is applied to the supplied sound signal regardless of the speaker connected to each channel. A parameter set used by each block of the IN signal processing unit for signal processing is initialized to a predetermined value when configuration data described below is applied.

  The Ach and Bch sound signals output from the IN signal processing 41a and 41b are supplied to a route control b block indicated by reference numeral. In the route control b, one of the DUAL / PARALLEL / SINGLE connections shown in FIG. 5B is performed 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 sound signal of Ach is output as two sound signals of 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 of Ach and Bch from the route control b are supplied to two SP signal processes 43a and 43b that perform signal processing according to the speakers 3 connected to each channel. FIG. 4 is a block diagram showing an example of the signal processing of the SP signal processing 43a and 43b. As shown in this figure, the SP signal processing 43a, 43b includes a plurality of blocks of a cascade-connected 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 initially set at the time of applying the configuration data, based on an amplifier mode and SP preset described later.

  There are various types of speakers 3 connected to the power amplifier 1, and the combinations thereof are also various. For example, there is a type that covers the entire audible band from low to high (FULL: whole range system), and a type that covers the low range in the audible band (SUB: subwoofer). There is a type (BI-AMP: bi-amplifier) that has a high-range speaker terminal and a high-range speaker terminal and is capable of bi-amp connection. These types of speakers are used in an appropriate combination according to the purpose of use. The input configuration and the output configuration of the digital signal processing unit 21 are set according to the type and use form of the speaker 3 connected to the amplifier 1. The [output configuration] is set by the user according to the type of the one or two speakers 3 connected to the two output terminals of Ach and Bch of the amplifier 1 and the usage form. 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 all input signals of a plurality of channels of the amplifier 1 are used, only a part of the input signals are used, and when all the input signals are used, the input signals are mixed and used. 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 kind of speaker 3 is connected to the power amplifier 1 and what kind of 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 selects the input configuration based on the selected output configuration and input configuration. In which one amplifier mode is selected.
FIG. 6 shows an amplifier mode table shown as a matrix of a plurality of output configurations and a plurality of input configurations as options. 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 for each selection frame. However, in the present invention, the amplifier mode that is not necessary is omitted, and the number of options is limited to a limited number of modes. For example, it is characterized in that the mode is limited to 15 modes. One of these 15 amplifier modes is selected based on the output configuration and the input configuration selected by the user. To explain each option of the output configuration, [FULL + FULL] is a type (FULL type) loudspeaker system (FULL type) that covers the entire audible band for each of two output terminals of Ach and Bch of the amplifier 1 (total system). (2 units) Output configuration to connect. This speaker system is not limited to one-way, but may be two-way or three-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 a speaker system (sub woofer) of a type (SUB type) in charge of the low frequency range of audible frequencies is connected to two output terminals of Ach and Bch of the amplifier 1 one by one (two in total). 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] has 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 range is cut out of the entire audible band from the amplifier 1, and the SUB type speaker system receives the low range sound signal. Is supplied.

[BI-AMP] prepares a speaker system of the type (BI-AMP type) that can be connected to a bi-amplifier, and connects the high-range speaker terminal of the BI-AMP type speaker system to the output terminal of Ach of the amplifier 1. This is an output configuration in which a low-range speaker terminal of the BI-AMP type speaker system is connected to the output terminal of Bch of the amplifier 1 to drive a bi-amplifier. When the corresponding configuration data is applied, a high-range speaker terminal is supplied with a sound signal in which the low range of the entire audible band is cut from the amplifier 1, and a low-range speaker signal is supplied to the low-range speaker terminal. Is supplied.
[FULL (BOOST)] connects one FULL type speaker system to the Ach output terminal of the amplifier 1 and uses the entire power that can be supplied by the analog power amplifier 23 for the Ach power amplification. This is an output configuration for driving one speaker system more strongly. By making the output of the Bch of the amplifier 1 a silent signal and relaxing the restriction of the protection circuit of the Bch output, one speaker system can emit a louder sound than when two speaker systems are connected (Boost operation). ). When the corresponding configuration data is applied, a sound signal in the entire audible band is supplied from the amplifier 1 to the speaker system of Ach, and a silent sound signal is supplied to the speaker system even if a speaker is connected to Bch. No sound is heard.
[SUB (BOOST)] is an output configuration in which one SUB type speaker system is connected to the Ach output terminal of the amplifier 1 and the total power is used for Ach power amplification to drive the speaker system strongly. is there. In the same manner as described above, one speaker system sounds with a louder sound (Boost operation).

Next, an input configuration designated by the user will be described. [Input 2ch, all stages 2ch] is such that the user inputs two independent sound signals to Ach and Bch of the amplifier 1 and the amplifier 1 uses the corresponding configuration data. Is an input configuration in which the input signal of Ach is processed by the IN signal processing 41a and the SP signal processing 43a, and the input signal of Bch is processed by the IN signal processing 41b and the SP signal processing 43b.
[Input 1ch, all stages 2ch] is such that the user inputs one sound signal to Ach of the power amplifier 1, and the amplifier 1 converts the input signal of Ach into the IN signal processing 41a and the SP signal by the corresponding configuration data. This is an input configuration in which the processing 43a and the IN signal processing 41b and the SP signal processing 43b are processed in parallel.
[Input 1ch, latter stage 2ch] is such that the user inputs one sound signal to Ach of the amplifier 1 and the amplifier 1 processes the input signal of Ach by the IN signal processing 41a according to the corresponding configuration data. This is an input configuration in which processed sound signals are processed in parallel by SP signal processing 43a and 43b.
[Input 1ch, All-stage 1ch] is an input configuration for the Boost operation. The user inputs one sound signal to Ach of the amplifier 1, and the amplifier 1 converts the input signal of Ach to the corresponding configuration data. , IN signal processing 41a and SP signal processing 43a.
[Input 2ch, Mixed] is an input configuration for the Boost operation. The user inputs two independent sound signals to Ach and Bch of the amplifier 1, and the amplifier 1 has two input signals according to the corresponding configuration data. An input configuration in which signals are mixed and IN signal processing and SP signal processing are performed on the sum sound signal in the same manner as the input configuration of [input 1 ch, ** (“*” is a wild card)] described above. It is. In this case, a path for IN signal processing and SP signal processing is uniquely determined according to [output configuration].

  Referring to the amplifier mode table of FIG. 6, when any of the output configurations is first selected by the user, the input configuration is restricted by the selected output configuration, and only the input configuration can be selected. For example, when the user selects [FULL + FULL], any of the input configurations of [input 2 ch, all steps 2 ch], [input 1 ch, all steps 2 ch], and [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 according to the selected output configuration and input configuration, and outputs the configuration data corresponding to the selected 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 input signal of Ach is processed by the IN signal processing 41a, and the input signal of Bch 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, 43b is selected by the user according to the configuration data of the selected mode 1 and the speaker 3 connected to the output 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 subjected to signal processing suitable for the two connected speakers 3 are output from 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 for specifying 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 processings It includes information and defines a path of a sound signal from an input unit to an output unit of the digital signal processing unit 21 and signal processing in the 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 speakers 3 connected to each output of the power amplifier 1 include types such as FULL, SUB, and BI-AMP. By supplying a sound signal that is adjusted according to the power and is power-limited according to the allowable input of the speaker 3, the performance of the speaker 3 can be sufficiently brought out. For this reason, when the amplifier mode is selected, the amplifier 1 assigns a parameter set (a plurality of parameters) to each block of the SP signal processing 43a (43b) based on the SP preset selected by the user according to the connected speaker 3. Initialize. Note that the SP preset for each speaker is a parameter set prepared for the speaker by the speaker manufacturer or the like, and includes parameters for flattening frequency characteristics, parameters for indicating a delay time, parameters for indicating an allowable input, The recommended cut-off frequency and the like are 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 a specified cutoff frequency in accordance with a combination of the connected speakers 3. The configuration data of the selected amplifier mode specifies whether to extract and output the high range or the low range from the sound signal at the crossover 50 of each channel, or to output the sound signal 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 input signal of Ach is set to the low band at the cutoff frequency. And high-frequency sound signals and 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. This EQ 52 may be used to create a sound closer 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 output power of the analog power amplifier 23 and the allowable input of the connected speaker 3. At the time of BOOST operation, the limit value is relaxed to enable large output. The delay 51 outputs the sound signal after delaying it by a designated delay time. In general, it is used to align the phases of sounds emitted from a plurality of speakers 3 with each other. Used for phase matching.

  For example, when the user selects the output configuration of [FULL + FULL] and the input configuration of [input 1ch, all stages 2ch], the amplifier 1 selects the corresponding mode 2 and converts the mode 2 configuration data to the digital signal processing unit 21. Apply to Thus, (a2, b1) is set for the route controls a and 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 two SP presets of two FULL type speaker systems (two [FULL]) selected by the user. The set value is set. The sound signal of the entire audible band subjected to signal processing (flattening of frequency characteristics, phase control, power limitation, etc.) suitable for two connected [FULL] type speakers 3 is transmitted from 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 to the route control a, b, and the parameter set of the SP signal processing 43a, 43b is composed of the configuration data of mode 3 and two SP presets of two [FULL] selected by the user. Initialized based on

  When the user selects the output configuration of [FULL + SUB] and the input configuration of [input 1ch, latter 2ch], 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 for the route control a, b, and the parameter set of the SP signal processing 43a, 43b is the configuration data of mode 8 and two SP presets of [SUB] and [FULL] selected by the user. The initial setting value is set based on. The SUB type speaker 3 ([SUB]) connected to Ach of the amplifier 1 receives the low-frequency sound signal extracted from the input signal of Ach based on the cutoff frequency at the crossover 50 of Ach, and further outputs the same. After being subjected to signal processing suitable for the speaker 3, the signal is output to the FULL type speaker 3 ([FULL]) connected to the Bch of the amplifier 1. The high frequency sound signal extracted from the input signal is output after being subjected to signal processing suitable for the speaker 3. Here, the cutoff frequency for extracting the high-frequency and low-frequency sound signals should be matched. The amplifier 1 determines one cutoff 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, raise the [FULL] cutoff frequency and increase the [recommended] cutoff frequency of [SUB]. If the recommended cut-off frequency of the [FULL] SP preset is higher than the recommended cut-off frequency of the [SUB] SP preset, raise the [SUB] cut-off frequency and increase the [FULL] (recommended). It is better to match the cutoff frequency.

  When the user selects the output configuration of [SUB + SUB] and the input configuration of [input 2ch, all stages 2ch], the amplifier 1 selects the corresponding mode 4 and applies the mode 4 configuration data to the digital signal processing unit 21. . (A3, b1) is set for the route control a, b, and the parameter set of the SP signal processing 43a, 43b is applied to the mode 4 configuration data and two SP presets of two [SUB] selected by the user. Is done. The [SUB] type speaker 3 connected to Ach of the amplifier 1 outputs a low-frequency sound signal extracted from the input signal of Ach based on a 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 input signal of the Bch at the crossover 50 based on a cutoff frequency suitable for the speaker 3. Is done. As the cutoff frequency of each channel, a 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 1 ch, latter 2 ch], the amplifier 1 selects the corresponding mode 10 and applies the configuration data of mode 10 to the digital signal processing unit 21. I 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 the configuration data of mode 10 and one of the [BI-AMP] type selected by the user. An initial setting value is set based on one SP preset corresponding to the speaker system. A low-frequency sound signal extracted based on the cutoff frequency at the Ach crossover 50 is output to a low-frequency speaker terminal of the BI-AMP type speaker 3 connected to Ach of the amplifier 1. The high-frequency sound signal extracted based on the cut-off frequency in 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 cutoff 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 the mode 11 to the digital signal processing unit 21. (A3, b2) is set to the route control a, b, and the parameter set of the SP signal processing 43a, 43b is configured by the configuration data of mode 11 and one SP preset of [BI-AMP] selected by the user. An initial setting value is set based on this.

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

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 in each process 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 the [MENU] screen, when the user turns the encoder 30e on the panel to move the cursor on the screen to [CONFIG WIZARD] and pushes the encoder 30e, the CPU 10 starts the configuration wizard processing. Thus, the push switch of the encoder 30e functions as an enter key. Further, the rotation of the encoder 30e moves the cursor on one screen, and changes the parameter value on another screen. When a character has an icon, the character is displayed as a black character with a white background, and when a certain character has no icon, the character is displayed as a white character with a black background. In each of the selection screens to be described below, a check box for each option is displayed, and a check box 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 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 this screen, an icon (FIG. 7A) corresponding to the temporarily selected output configuration is displayed. When 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 causes the display 15 to display a [ROUTING] screen of << c >>. On the [ROUTING] screen, the input configuration restricted 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 steps 2ch), [IN: 1CH ALL: 2CH] (input 1ch, all steps 2ch), [ IN: 2CH MIX] (input 2ch, mixed) is displayed. When 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 this screen, one amplifier mode icon (FIG. 7B) corresponding to the selected output configuration and the provisionally selected input configuration is displayed. The CPU 10 checks the rectangular check box of the input configuration, and proceeds to step S12 ([NEXT]). If the user presses the return key 30d during the processing in step S11, the CPU 10 returns to the previous processing (S10) ([BACK]) and executes the output configuration selection processing again.

  The icon of each amplifier mode displayed here (FIG. 7B) includes a text of the input configuration and output configuration of the amplifier mode, and a schematic diagram of the processing in the amplifier mode. In the example of << c >>, since [FULL + FULL] is selected and [IN: 2CH ALL: 2CH] is tentatively 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 [d] [SP SERIES] screen. On the [d] [SP SERIES] screen, 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 are displayed as selection candidates. You. Since one SP preset is stored in the memory 11 corresponding to each product, the selection of one product here can be regarded as the selection of one corresponding SP preset. In addition, if all the products that fit one type are displayed on this screen, the number is too large for the user to select, so here, first, the product series, and then the user Select one product. In the example of the [SP SERIES] screen of Ach shown in << d >>, the target channel [A] and the speaker type [FULL] are selected, and [A], [CBR], Three series of [Club V] and [<GENERIC>] and [<FLAT>] indicating general products are displayed. Here, the user moves the cursor and provisionally selects any one of the series or the 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. During the above process, if the user presses the return key 30d, 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 [e] [SP MODEL] screen. The target channel [A], the speaker type [FULL] of the target channel, and the product corresponding to the [FULL] type in the selected [CBR] series are displayed on the [SP MODEL] screen of << e >>. . Here, the user moves the cursor and provisionally selects any one of the 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 if the selected configuration data specifies the speaker type of Bch in addition to Ach (mode 1 to mode 9), the next processing in step S13 is performed. If only the Ach speaker type has been designated (mode 10 to mode 15), the process proceeds to step S14. During the above process, if the user presses the return key 30d, the CPU 10 returns to the previous process ([BACK]) and executes the series selection process again. When the speaker type of Ach in the selected configuration data is [FULL], only the [FULL] type product (SP preset) is displayed as a selection candidate on the [SP MODEL] screen of Ach. When the Ach speaker type is [SUB], only the [SUB] type product is displayed, and when the Ach speaker type is [BI-AMP], only the [BI-AMP] type product is displayed on the same screen as a selection candidate. You.
Although not shown, when the speaker type of Bch is the same as that of Ach in the next process in step S13, the CPU 10 displays a screen asking the user whether to select the product selected in Ach also in Bch. 15 is displayed. If the user responds to the selection, the CPU 10 selects the same product (SP preset) for Bch as for Ach, and proceeds to step S14. Here, if the user responds that the user does not make a selection, or if the speaker type of Bch is different from Ach, the CPU 10 sends one series from the user to the [SP SERIES] screen of Bch, as in the case of Ach described above. Is received, and then the user selects one product (SP preset) on the [SP MODEL] screen. If the user presses the return key 30d during each of the selection processes, the CPU 10 returns to the immediately preceding selection process ([BACK]) and executes the immediately preceding selection process again. When the selection of the SP presets for Ach and Bch is completed, the CPU 10 proceeds to step S14.

  In step S14, based on the configuration data of the selected amplifier mode and the selected one or two SP presets, the CPU 10 sets the route control a and b and includes a parameter set of the SP signal processing 43a and 43b. Determine one configuration plan (multiple parameter values). Then, the CPU 10 causes the display 15 to display a [CONFIRMATION] screen of << f >> including the determined setting plan. The user scrolls the setting plan in the [CONFIRMATION] screen by turning the encoder 30e, and checks each parameter value. If there is no problem, the user pushes the encoder 30e and instructs to apply. Thereby, 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 selects the A-ch or B-ch SP preset performed immediately before. Is executed 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 of the route control a, b, SP signal processing 43a, 43b, etc. Apply a configuration plan. When the setting of the parameter values is completed, the CPU 10 displays a [CONFIG WIZARD] screen including [EXECUTED!] On the display 15 to notify the user that the setting of the power amplifier 1 has been completed. For example, when mode 1 is selected and [CBR12] is selected for chA and chB, a sound signal obtained by subjecting the input signal of Ach to signal processing suitable for CBR12 and power-amplifying is output from Ach of the amplifier 1. Then, the Bch of the amplifier 1 outputs a sound signal obtained by subjecting the input signal of the Bch to signal processing suitable for the CBR 12 and power-amplifying it. Here, when the user pushes the encoder 30e ([OK]), the CPU 10 ends the configuration wizard process, and the CPU 10 causes the display unit 15 to display the home screen of “h”. The home screen displays the current gains of Ach and Bch, as well as the products of Ach and Bch (for example, [CBR12]) selected in the latest configuration wizard process. In addition, on the home screen of FIG. 2 before the execution of the configuration wizard process, another product ([SW115V]) was displayed on Ach and Bch. Each parameter value set based on the setting plan is not a fixed value and can be individually adjusted by the 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 (config data) and the selected product (SP preset). For example, regardless of the mode, in the SP signal processing 43 of a channel in which one [FULL] type product is selected, a parameter set is set based on the SP preset corresponding to the 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 one of modes 7 to 9 is selected and a certain [FULL] product and a certain [SUB] product are selected, the SP is set based on the two SP presets of the [FULL] product and the [SUB] product. The cutoff frequency in the crossover 50 of the signal processing 43 is determined.

  The user can adjust the values of the parameters of the IN signal processing 41a, 41b and the SP signal processing 43a, 43b 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. Further, the user enters the edit screen of the crossover 50, selects a cutoff frequency, and can change the value with the encoder 30e.

Although the embodiment according to the present invention described above is a 2-channel power amplifier, the present invention can be applied to audio devices other than 2ch, for example, 4ch, 8ch, etc. In that case, the method of the present invention may be applied to each pair of two channels, or the group of three or more channels may be formed, and the method of the present invention may be applied to each group. Further, the method for setting a power amplifier according to the present invention is not limited to the power amplifier, and is applied to various audio devices connected to the previous stage of the power amplifier, for example, a speaker processor, a stage box for expanding the input and output of a digital mixer, and the like. it can. When signal processing is performed on only one channel, Ach is used, but Bch may be used. In the modes 7 to 11, the low band is processed by Ach and the high band is processed by Bch, but may be reversed.
In the above description, the number of output configuration options is six, but it is not necessary to limit the number 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, it is only necessary that the number of selected modes be smaller than the product of the number of output configurations and the number of input configurations.
The embodiment according to the present invention described above presents an output configuration and an input configuration limited according to the output configuration to the user, allows the user to specify the output configuration and the input configuration, and specifies the output configuration and the input configuration. Is presented to the user, and one of the amplifier modes is selected. Further, since the amplifier mode selected by the user contains information on what kind of speaker is connected to the power amplifier, SP presets that can be selected in the amplifier mode can be narrowed down.

1 power amplifier, 2 external sources, 3 speakers, 10 CPU, 11 flash memory, 12 RAM, 13 other I / O, 14 operators, 15 display, 20 waveform input section, 21 digital signal processing section, 22 D / A A / D section, 23 analog power amplifier, 24 bus, 30a Ach knob, 30b Ach button, 30c menu key, 30d return key, 30e rotary encoder, 30f Bch knob, 30g Bch button, 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;
Receiving a selection of one output configuration from the plurality of output configurations from a user;
A third step of receiving from the user a selection of one input configuration from among the input configurations restricted by the selected output configuration;
A fourth step of selecting one amplifier mode from a plurality of amplifier modes based on the selected output configuration and the selected input configuration;
A fifth step of selecting configuration data according to the selected amplifier mode and applying the configuration data to signal processing performed by the signal processing unit;
A method for setting an acoustic device, comprising:   The method according to claim 1, wherein the plurality of configuration data specify a path of a sound signal from an n input unit to an n output unit and signal processing in the path.   The method according to claim 1, wherein each of the plurality of output configurations specifies a type of one or more speakers connected to the n output units. 4. The method according to claim 3 , wherein the plurality of configuration data designates an entire system or a low-frequency system as the type. The method according to claim 3 , wherein the plurality of configuration data include configuration data that specifies a bi-amplifier as the type.   6. The sound according to claim 1, wherein each of the plurality of input configurations specifies whether to use only a part or all of the n signals received by the n input units. How to set up the device.   7. The method according to claim 1, wherein the plurality of input configurations define whether the n signals received by the n inputs are mixed and processed for each pair or processed without being mixed. How to set up audio equipment. A sixth step of preparing a plurality of presets corresponding to a plurality of speakers;
A seventh step of extracting a speaker corresponding to the selected configuration data from the plurality of speakers;
And an eighth step of receiving a selection of one speaker from the extracted speakers from the user. In the fifth step, a signal corresponding to the selected speaker is preset by the signal processing unit. The method according to claim 1, wherein the method is applied to a process.