JP2011069930A - Acoustic apparatus - Google Patents

Acoustic apparatus Download PDF

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JP2011069930A
JP2011069930A JP2009219827A JP2009219827A JP2011069930A JP 2011069930 A JP2011069930 A JP 2011069930A JP 2009219827 A JP2009219827 A JP 2009219827A JP 2009219827 A JP2009219827 A JP 2009219827A JP 2011069930 A JP2011069930 A JP 2011069930A
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JP5593481B2 (en
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Takaaki Yanagisawa
隆晃 柳沢
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Korg Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an acoustic apparatus which generates a novel sound effect when an event command signal showing that supply of a stereo signal is stopped is imparted. <P>SOLUTION: In a normal time, a control part 1300 makes switches 1405 and 1410 be in an ON state and imparts only a left signal and a right signal of a stereo sound source part 1400 to addition parts 1200 and 1250, respectively, so that only the sound of a stereo signal is emitted. Then when the event command signal is imparted, the control part 1300 makes switches 1420 and 1425 be in the ON state at this time, and adds the sound effect generated by inputting two kinds of signals from a loop delay part 1000 to a sound effect generation part 1100 alternately into the addition parts 1200 and 1250 as well, so that the novel sound effect can be obtained by generating the sound effect even if the stereo sound signal from the stereo sound source part 1400 is stopped. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、ステレオ信号の供給が停止する旨を示す信号であるイベント指令信号が与えられた時に奇抜な効果音を発音可能な音響効果装置に関する。   The present invention relates to an acoustic effect device capable of producing an unusual sound effect when an event command signal, which is a signal indicating that supply of a stereo signal is stopped, is given.

従来、効果音を仮想的に付与する装置、より具体的には、残響音を仮想的に聴取者の後方側から聞こえるようにした装置が提案されていた。この装置は、聴取者の前方に配置された2個以上のスピーカを使用し、入力信号から生成された残響や反射音等のサラウンド信号が聴取者の後方から到来するように、聴取者の後方に頭部伝達関数(Head Related Transfer Function)をFIRフィルタにて実現し、更に、後方から到来するサラウンド信号を複数の遅延器により所定時間だけ遅延させることにより、後方にも音場が形成される。換言すれば、後方での音の定位感を聴取者に与えて、実際に後方にスピーカを設置したのと同様な臨場感のある音響効果を奏することが可能であった(例えば、特許文献1参照。)。   Conventionally, there has been proposed a device that virtually gives a sound effect, more specifically, a device that virtually hears a reverberant sound from the rear side of a listener. This device uses two or more speakers arranged in front of the listener, so that surround signals such as reverberation and reflected sound generated from the input signal come from behind the listener. A head related transfer function is realized with an FIR filter, and a surround signal arriving from behind is delayed for a predetermined time by a plurality of delay devices, thereby forming a sound field in the rear. . In other words, it is possible to give the listener a sense of localization of the sound in the rear and to produce a realistic sound effect similar to that of actually installing the speaker behind (for example, Patent Document 1). reference.).

特開平5−207597号公報(第2−5頁、第1図)JP-A-5-207597 (page 2-5, Fig. 1)

しかしながら、従来の装置によれば、実際にはスピーカを配置しないにもかかわらず、そこから音が鳴るような定位感を得ることはできるものの、入力信号が停止したり、ゲーム機のゲーム進行等で特殊なイベントが発生してメインのステレオ信号が停止した場合の音響効果については何ら考慮されていなかった。したがって、従来技術にあっては、イベントが発生して音の再生が停止された場合等には、何ら臨場感のある音響効果を与えることができなかった。   However, according to the conventional device, although a speaker is not actually arranged, a feeling of localization from which sound is produced can be obtained, but the input signal is stopped, the game progress of the game machine, etc. However, no consideration was given to the acoustic effect when a special event occurred and the main stereo signal stopped. Therefore, in the related art, when an event occurs and sound reproduction is stopped, it is impossible to provide a realistic sound effect.

そして、本発明者の研究調査によれば、例えばゲーム機では何らかのイベントが発生した時にステレオ音の再生を停止させ、この停止に応答して珍しい音響効果を付与することが期待されていることが分かった。そこで、本発明は、かかる従来の課題を解決するためになされたもので、ステレオ信号の供給が停止する旨を示す信号であるイベント指令信号が与えられると奇抜な効果音を発音させる音響装置を提供することを目的とする。   According to the research of the inventor, for example, in a game machine, when an event occurs, it is expected that playback of stereo sound is stopped and an unusual sound effect is given in response to the stop. I understood. Therefore, the present invention has been made to solve such a conventional problem, and an audio device that produces an unusual sound effect when an event command signal that is a signal indicating that the supply of stereo signals is stopped is provided. The purpose is to provide.

上記目的を達成するために、本発明は、左信号および右信号からなるステレオ信号を出力するステレオ音源部と、
ステレオ信号を入力してループ状に信号を循環させるループ遅延部と、
このループ遅延部で遅延された信号を入力して、効果音信号を生成する効果音生成部と、前記ステレオ音源部からの左信号と前記効果音生成部からの効果音とを加算する第1の加算部と、前記ステレオ音源部からの右信号と前記効果音生成部からの効果音とを加算する第2の加算部と、自装置の動作制御をする制御部と、を備え、
前記制御部は、
前記ステレオ信号の供給が停止する旨を示す信号であるイベント指令信号が与えられない通常時には前記ステレオ音源部の左信号および右信号のみを夫々前記第1の加算部と前記第2の加算部に与える一方、前記イベント指令信号が与えられた場合には、前記ループ遅延部からの信号を前記効果音生成部へ2種類交互に入力させるようにして効果音生成部を起動させることを特徴とするようにした。
To achieve the above object, the present invention provides a stereo sound source unit that outputs a stereo signal composed of a left signal and a right signal,
A loop delay unit that inputs a stereo signal and circulates the signal in a loop; and
A sound effect generator that generates a sound effect signal by inputting the signal delayed by the loop delay unit, and a first signal that adds the left signal from the stereo sound source unit and the sound effect from the sound effect generator A second addition unit that adds the right signal from the stereo sound source unit and the sound effect from the sound effect generation unit, and a control unit that controls the operation of the device itself,
The controller is
When an event command signal, which is a signal indicating that the supply of the stereo signal is stopped, is not given, only the left signal and the right signal of the stereo sound source unit are normally sent to the first adder unit and the second adder unit, respectively. On the other hand, when the event command signal is given, the sound effect generation unit is activated by alternately inputting two types of signals from the loop delay unit to the sound effect generation unit. I did it.

つまり、図4に示すように、制御部1300はイベント指令信号が与えられない通常時には、スイッチ1405、1410をオン状態として、ステレオ音源部1400の左信号(L信号)および右信号(R信号)のみを夫々加算部1200、1250(第1の加算部、前記第2の加算部)に与えるので、通常時には単なるステレオ信号のみが放音される。そして、制御部1300はイベント指令信号が与えられると、ステレオ信号の供給は停止されるものの、スイッチ1420、1425をオン状態として、ループ遅延部1000からの信号を効果音生成部1100へ2種類交互に入力させて生成された効果音を加算部1200、1250にも加える。その結果、たとえステレオ音源部1400からのステレオ音信号が停止しても、効果音が発生し奇抜な音響効果を得ることが可能となる。   That is, as shown in FIG. 4, the control unit 1300 turns on the switches 1405 and 1410 in the normal state when no event command signal is given, and the left signal (L signal) and the right signal (R signal) of the stereo sound source unit 1400. Only the stereo signals are output to the adding units 1200 and 1250 (the first adding unit and the second adding unit). When the event command signal is given to the control unit 1300, the supply of the stereo signal is stopped, but the switches 1420 and 1425 are turned on, and two types of signals from the loop delay unit 1000 are alternately supplied to the sound effect generation unit 1100. Is added to the adding units 1200 and 1250 as well. As a result, even if the stereo sound signal from the stereo sound source unit 1400 is stopped, a sound effect is generated and an unusual sound effect can be obtained.

より具体的には、上記音響装置において、前記ループ遅延部は、前記ステレオ音源部からの左信号と右信号との加算信号を第1の入力とする加算部(74)と、この加算部(74)の加算信号に対して遅延を与える遅延部(76)と、この遅延部(76)で遅延された信号に係数を乗じる係数部(78)と、この係数部(78)からの信号に対して遅延を与える遅延部(72)とをこの順番で接続し、前記加算部(74)は前記遅延部(72)からの信号の第2の入力として、前記第1の入力と前記第2の入力とを加算する構成とし、前記効果音生成部は、前記係数部(78)と前記遅延部(72)との接続点からの信号と前記加算部(74)の加算結果に係数を乗じる係数部(79)からの信号との2種類の信号を交互に入力して効果音信号を生成し、前記制御部は、通常時には前記係数部(79)および前記係数部(78)の係数を「0」とする一方、イベント指令信号が与えられた場合には、前記係数部(79)の係数を「1」とすると共に前記係数部(78)の係数を「−1」より大きく「1」より小さな値とすることを特徴とする音響装置が構成できる。また、上記音響装置において、前記ループ遅延部を第1のループ遅延部(90)と第2のループ遅延部(100)で構成し、前記第1のループ遅延部(90)は、前記ステレオ音源部からの左信号を遅延部(120)で遅延させた信号を第1の入力とする加算部(96)と、この加算部(96)の加算信号に対して遅延を与える遅延部(92)と、この遅延部(92)で遅延された信号に係数を乗じる係数部(94)とをこの順番で接続して、前記加算部(96)は前記係数部(96)からの信号を第2の入力として、前記第1の入力と前記第2の入力とを加算する構成とし、また、前記第2のループ遅延部(100)は前記ステレオ音源部からの左信号を遅延部(125)で遅延させた信号を第1の入力とする加算部(106)と、この加算部(106)の加算信号に対して遅延を与える遅延部(102)と、この遅延部(102)で遅延された信号に係数を乗じる係数部(104)とをこの順番で接続して、前記加算部(106)は前記係数部(104)からの信号の第2の入力として、前記第1の入力と前記第2の入力とを加算する構成とし、更に、前記遅延部(125)の遅延量を前記遅延部(120)の遅延量より小さく設定し、前記前記効果音生成部は、前記第1のループ遅延部(90)の加算部(96)からの信号に係数を乗じた信号と、前記第2のループ遅延部(100)の加算部(106)からの信号に係数を乗じた信号との2種類の信号を交互に入力して効果音信号を生成し、前記制御部は、通常時には前記係数部(110)、前記係数部(115)、前記係数部(94)および前記係数部(104)の4つの係数を「0」とする一方、イベント指令信号が与えられた場合には、前記係数部(110)及び前記係数部(115)の係数を「1」とすると共に、前記係数部(94)及び前記係数部(104)の係数を「−1」より大きく「1」より小さな値とすることを特徴とする音響装置としても良い。   More specifically, in the acoustic apparatus, the loop delay unit includes an addition unit (74) having a first input of an addition signal of the left signal and the right signal from the stereo sound source unit, and the addition unit ( 74) a delay unit (76) that gives a delay to the added signal, a coefficient unit (78) that multiplies the signal delayed by the delay unit (76) by a coefficient, and a signal from the coefficient unit (78). A delay unit (72) that gives a delay to the delay unit (72) is connected in this order, and the adder unit (74) serves as the second input of the signal from the delay unit (72) and the second input. The sound effect generator multiplies the signal from the connection point between the coefficient unit (78) and the delay unit (72) and the addition result of the adder (74) by a coefficient. Two kinds of signals, the signal from the coefficient part (79) and the sound signal The control unit normally sets the coefficients of the coefficient unit (79) and the coefficient unit (78) to “0”, and when an event command signal is given, the control unit (79) ) Is set to “1”, and the coefficient of the coefficient section (78) is set to a value larger than “−1” and smaller than “1”. In the acoustic apparatus, the loop delay unit includes a first loop delay unit (90) and a second loop delay unit (100), and the first loop delay unit (90) includes the stereo sound source. An adder (96) having a signal obtained by delaying the left signal from the adder (120) by the delay unit (120) as a first input, and a delay unit (92) for delaying the added signal of the adder (96) And a coefficient unit (94) for multiplying the signal delayed by the delay unit (92) by a coefficient in this order, and the adding unit (96) receives the signal from the coefficient unit (96) as a second signal. As the input, the first input and the second input are added, and the second loop delay unit (100) receives the left signal from the stereo sound source unit by the delay unit (125). An adder (106) having the delayed signal as a first input, and this adder A delay unit (102) that delays the addition signal of the unit (106) and a coefficient unit (104) that multiplies the signal delayed by the delay unit (102) in this order, and The adder (106) is configured to add the first input and the second input as the second input of the signal from the coefficient unit (104), and further, the delay of the delay unit (125) The amount is set to be smaller than the delay amount of the delay unit (120), and the sound effect generation unit includes a signal obtained by multiplying the signal from the addition unit (96) of the first loop delay unit (90) by a coefficient, The sound signal is generated by alternately inputting two types of signals, a signal obtained by multiplying the signal from the addition unit (106) of the second loop delay unit (100) by a coefficient, and the control unit includes: Normally, the coefficient part (110), the coefficient part (115), and the coefficient While the four coefficients of the part (94) and the coefficient part (104) are set to “0”, when an event command signal is given, the coefficients of the coefficient part (110) and the coefficient part (115) are changed. In addition to “1”, the coefficients of the coefficient part (94) and the coefficient part (104) may be larger than “−1” and smaller than “1”.

本発明によれば、イベント指令信号が与えられると奇抜な効果音を発音させることができるという効果が得られる。   According to the present invention, when an event command signal is given, an effect that a strange sound effect can be produced is obtained.

音響装置1の構成図である。1 is a configuration diagram of an acoustic device 1. FIG. 音響装置2の構成図である。1 is a configuration diagram of an acoustic device 2. FIG. 効果音生成部50の構成図である。3 is a configuration diagram of a sound effect generator 50. FIG. 本発明の構成図である。It is a block diagram of the present invention. ステレオ音源部の他の構成例の説明図である。It is explanatory drawing of the other structural example of a stereo sound source part.

以下、本発明を実施の形態について図面を参照しつつ説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(第1実施形態)
図1は本発明の第1実施の音響装置1の構成図である。この音響装置1は、左信号(Lチャンネル信号)および右信号(Rチャンネル信号)からなるステレオ信号を出力するステレオ音源部10と、Lチャンネル信号をその2入力の内の一方の入力とする加算部20と、この加算部20の加算結果をデジタルアナログ変換するD/A変換器30と、この変換されたアナログ信号を放音するスピーカ40と、Rチャンネル信号をその2入力の内の一方の入力とする加算部25と、この加算部25の加算結果をデジタルアナログ変換するD/A変換器35と、この変換されたアナログ信号を放音するスピーカ45とを有している。
(First embodiment)
FIG. 1 is a configuration diagram of an audio device 1 according to a first embodiment of the present invention. This audio device 1 includes a stereo sound source unit 10 that outputs a stereo signal composed of a left signal (L channel signal) and a right signal (R channel signal), and addition using the L channel signal as one of the two inputs. Unit 20, a D / A converter 30 for digital / analog conversion of the addition result of the addition unit 20, a speaker 40 for emitting the converted analog signal, and an R channel signal for one of the two inputs It has an adder 25 as an input, a D / A converter 35 for digital / analog conversion of the addition result of the adder 25, and a speaker 45 for emitting the converted analog signal.

また、この音響装置1は、加算部80によって左信号と右信号との加算結果を入力してループ状に音信号を循環させるループ遅延部70を備えている。このループ遅延部70は、ステレオ音源部10からの左信号と右信号との加算部80による加算信号を第1の入力とする加算部74と、この加算部74の加算信号に対して遅延を与える遅延部76と、この遅延部76で遅延された信号に係数Aを乗じる係数部78と、この係数部78からの信号に対して遅延を与える遅延部72とをこの順番で右回りに接続し、加算部70は、加算部80の加算結果と遅延部72からの信号とを加算する構成としている。更に、効果音生成部50は、係数Aを有する係数部78と遅延部72との接続点からの信号と、加算部74の加算結果に係数Bを乗じる係数部79からの信号との2種類の信号を交互に入力して、効果音信号を生成する。なお、遅延部76と遅延部72の遅延量は同じとなるように設定されている。   In addition, the acoustic device 1 includes a loop delay unit 70 that inputs an addition result of the left signal and the right signal by the adding unit 80 and circulates the sound signal in a loop shape. This loop delay unit 70 has a delay with respect to the addition signal of the addition unit 74 having the first input of the addition signal from the addition unit 80 of the left signal and the right signal from the stereo sound source unit 10 and the addition signal of the addition unit 74. A delay unit 76 for giving, a coefficient unit 78 for multiplying the signal delayed by the delay unit 76 by a coefficient A, and a delay unit 72 for giving a delay to the signal from the coefficient unit 78 are connected clockwise in this order. The adding unit 70 is configured to add the addition result of the adding unit 80 and the signal from the delay unit 72. Further, the sound effect generator 50 has two types of signals: a signal from the connection point between the coefficient unit 78 having the coefficient A and the delay unit 72 and a signal from the coefficient unit 79 that multiplies the addition result of the adder 74 by the coefficient B. Are alternately input to generate a sound effect signal. The delay amounts of the delay unit 76 and the delay unit 72 are set to be the same.

そして、制御部60は、ステレオ信号の供給が停止されない通常時には係数部79および係数部78の係数B、Aを「0」とする一方、ステレオ信号の供給が停止される旨を示す信号であるイベント指令信号が与えられた場合には、係数部79の係数Bを「1」とすると共に、係数部78の係数Aを「−1」より大きく「1」より小さな値例えば「0.6」とする。遅延信号の帰還量を決める係数は、絶対値を「1」以下にすることで発振をさけており、負の係数「−1から0未満」にしても効果がある。   The control unit 60 is a signal indicating that the supply of the stereo signal is stopped while the coefficients B and A of the coefficient unit 79 and the coefficient unit 78 are set to “0” at the normal time when the supply of the stereo signal is not stopped. When the event command signal is given, the coefficient B of the coefficient part 79 is set to “1”, and the coefficient A of the coefficient part 78 is set to a value larger than “−1” and smaller than “1”, for example, “0.6”. And The coefficient that determines the feedback amount of the delay signal avoids oscillation by setting the absolute value to “1” or less, and it is effective to set the negative coefficient “−1 to less than 0”.

図3は仮想的に音像を定位させる効果音を生成する効果音生成部50の構成例である。符号130、135は夫々、右チャンネル用頭部伝達関数、左チャンネル用頭部伝達関数であり、左右耳用の頭部伝達関数を係数とするフィルタリングを行い、音像を任意の方向に定位させる。出力は夫々、左耳用、右耳用の信号となる。符号140、145は加算部である。トランスオーラル部150は、いわゆるトランスオーラル処理を実行するためのものであり、加算部140、加算部145からの加算結果を入力し、スピーカを使用しても右チャンネルの音は右耳だけに、また、左チャンネルの音は左耳だけに到達させる機能を有する。なお、このトランスオーラル部150を含む図3の構成自体は公知であり、例えば「電子情報通信学会刊:音響システムとディジタル処理234頁」に記載されている。このように効果音生成部50は音像定位処理を行う音像定位処理部となる。また、極めて単純には効果音生成部50は2種類の信号の交互の入力に応答して異なる効果音を発生する構成であれば良い。   FIG. 3 is a configuration example of the sound effect generation unit 50 that generates sound effects that virtually localize the sound image. Reference numerals 130 and 135 denote a right-channel head-related transfer function and a left-channel head-related transfer function, respectively, which perform filtering using the left-right ear head-related transfer function as a coefficient to localize the sound image in an arbitrary direction. Outputs are signals for the left ear and the right ear, respectively. Reference numerals 140 and 145 denote addition units. The trans-oral unit 150 is for performing so-called trans-oral processing. The addition result from the addition unit 140 and the addition unit 145 is input, and even if the speaker is used, the right channel sound is only in the right ear. The sound of the left channel has a function to reach only the left ear. 3 including the trans-oral unit 150 is known per se, and is described in, for example, “published by the Institute of Electronics, Information and Communication Engineers: Acoustic System and Digital Processing, page 234”. In this way, the sound effect generating unit 50 is a sound image localization processing unit that performs sound image localization processing. In addition, the sound effect generation unit 50 may be configured to generate different sound effects in response to alternating input of two types of signals.

次に動作を説明する。制御部60は、ステレオ信号の供給が停止されない通常時には係数部79の係数Bおよび係数部78の係数Aを「0」とする。この場合、ループ遅延部70内での信号のループ遅延が行われないと共に、効果音生成部50へのループ遅延部70からの信号は無効とされる。したがって、この場合にはステレオ音源10からのLチャンネル信号とRチャンネル信号とが夫々、加算部20、加算部25に入力されてステレオ音がスピーカ40、スピーカ45から放音されるにすぎない。   Next, the operation will be described. The control unit 60 sets the coefficient B of the coefficient unit 79 and the coefficient A of the coefficient unit 78 to “0” at the normal time when the supply of the stereo signal is not stopped. In this case, the loop delay of the signal in the loop delay unit 70 is not performed, and the signal from the loop delay unit 70 to the sound effect generating unit 50 is invalidated. Therefore, in this case, the L channel signal and the R channel signal from the stereo sound source 10 are input to the adder 20 and the adder 25, respectively, and the stereo sound is merely emitted from the speakers 40 and 45.

次に、制御部60は、ステレオ信号の供給が停止される旨を示す信号であるイベント指令信号が与えられると、係数部79の係数Bを「1」にすると共に、係数部78の係数Aを「0.6」にする。この結果、先ず最初に、加算部80による加算結果が、加算部70及び係数部79を介して効果音生成部50に入力され、これに応答して効果音生成部50が効果音を生成する。次にループ遅延の効果が発揮され、加算部70、遅延部76、係数部78を循環した信号が符号A1で示す線を介して効果音生成部50に入力され、これに応答して効果音生成部50が効果音を生成する。次いで、加算部70、遅延部76、係数部78、遅延部72を循環した信号が係数部79を介して効果音生成部50に入力され、これに応答して効果音生成部50が効果音を生成する。次いで、再度、加算部70、遅延部76、係数部78を循環した信号が符号A1で示す線を介して効果音生成部50に入力され、これに応答して効果音生成部50が効果音を生成する。次いで、加算部70、遅延部76、係数部78、遅延部72を循環した信号が係数部79を介して効果音生成部50に入力され、これに応答して効果音生成部50が効果音を生成するという動作を繰り返す。つまり、図1に示すように、効果音生成部50への入力は符号X、Y、X、Y、…と交互に繰り返すことになる。なお、係数部78の係数Aは1未満の「0.6」であるため、最終的には、効果音生成部50への入力は除々に減衰して最終的には入力信号は存在しなくなり効果音も存在しなくなる。このように効果音生成部50への入力は、ループ遅延部70を使用して交互に行われるので奇抜な効果音の生成を行うことが可能となる。   Next, when an event command signal which is a signal indicating that the supply of the stereo signal is stopped is given, the control unit 60 sets the coefficient B of the coefficient unit 79 to “1” and the coefficient A of the coefficient unit 78. To “0.6”. As a result, first, the addition result by the adding unit 80 is input to the sound effect generating unit 50 via the adding unit 70 and the coefficient unit 79, and the sound effect generating unit 50 generates a sound effect in response thereto. . Next, the effect of the loop delay is exhibited, and the signal that has circulated through the adding unit 70, the delay unit 76, and the coefficient unit 78 is input to the sound effect generating unit 50 through the line indicated by the symbol A1, and in response to this, the sound effect is generated. The generation unit 50 generates sound effects. Next, a signal that has circulated through the adding unit 70, the delay unit 76, the coefficient unit 78, and the delay unit 72 is input to the sound effect generating unit 50 via the coefficient unit 79, and the sound effect generating unit 50 responds to this by the sound effect generating unit 50 Is generated. Next, the signal that has circulated again through the adding unit 70, the delay unit 76, and the coefficient unit 78 is input to the sound effect generating unit 50 via a line indicated by reference numeral A1, and the sound effect generating unit 50 responds to this by receiving the sound effect. Is generated. Next, a signal that has circulated through the adding unit 70, the delay unit 76, the coefficient unit 78, and the delay unit 72 is input to the sound effect generating unit 50 via the coefficient unit 79, and the sound effect generating unit 50 responds to this by the sound effect generating unit 50 The operation of generating is repeated. That is, as shown in FIG. 1, the input to the sound effect generator 50 is repeated alternately with the codes X, Y, X, Y,. Since the coefficient A of the coefficient unit 78 is “0.6”, which is less than 1, finally, the input to the sound effect generating unit 50 is gradually attenuated and finally no input signal exists. There is no sound effect. As described above, since the input to the sound effect generating unit 50 is alternately performed using the loop delay unit 70, it is possible to generate a strange sound effect.

(第2実施形態)
図2は本発明の第2実施の音響装置2の構成図である。この音響装置2は、左信号(Lチャンネル信号)および右信号(Rチャンネル信号)からなるステレオ信号を出力するステレオ音源部10と、Lチャンネル信号をその2入力の内の一方の入力とする加算部20と、この加算部20の加算結果をデジタルアナログ変換するD/A変換器30と、この変換されたアナログ信号を放音するスピーカ40と、Rチャンネル信号をその2入力の内の一方の入力とする加算部25と、この加算部25の加算結果をデジタルアナログ変換するD/A変換器35と、この変換されたアナログ信号を放音するスピーカ45とを有している。
(Second Embodiment)
FIG. 2 is a configuration diagram of the acoustic device 2 according to the second embodiment of the present invention. This audio device 2 includes a stereo sound source unit 10 that outputs a stereo signal composed of a left signal (L channel signal) and a right signal (R channel signal), and addition using the L channel signal as one of the two inputs. Unit 20, a D / A converter 30 for digital / analog conversion of the addition result of the addition unit 20, a speaker 40 for emitting the converted analog signal, and an R channel signal for one of the two inputs It has an adder 25 as an input, a D / A converter 35 for digital / analog conversion of the addition result of the adder 25, and a speaker 45 for emitting the converted analog signal.

また、この音響装置2のループ遅延部は、第1のループ遅延部90と第2のループ遅延部100とから成っている。第1のループ遅延部90は、ステレオ音源部10からの左信号を遅延部120で遅延させた信号を入力とする加算部96と、加算部96の加算信号に対して遅延を与える遅延部92と、この遅延部92で遅延された信号に係数A2を乗じる係数部94とをこの順番で右回りに接続して、加算部96は係数部94からの信号と遅延部120からの信号とを加算する構成となっている。同様に、第2のループ遅延部100は、ステレオ音源部10からの左信号を遅延部125で遅延させた信号を入力とする加算部106と、この加算部106の加算信号に対して遅延を与える遅延部102と、この遅延部102で遅延された信号に係数A1を乗じる係数部104とをこの順番で右回りに接続して、加算部106は係数部104からの信号と遅延部125からの信号とを加算する構成となっている。   In addition, the loop delay unit of the acoustic device 2 includes a first loop delay unit 90 and a second loop delay unit 100. The first loop delay unit 90 includes an adder 96 that receives a signal obtained by delaying the left signal from the stereo sound source unit 10 by the delay unit 120, and a delay unit 92 that delays the added signal from the adder 96. And a coefficient unit 94 that multiplies the signal delayed by the delay unit 92 by the coefficient A2 in this order in a clockwise direction, and the addition unit 96 combines the signal from the coefficient unit 94 and the signal from the delay unit 120. It is the structure which adds. Similarly, the second loop delay unit 100 has an adder unit 106 that receives a signal obtained by delaying the left signal from the stereo sound source unit 10 by the delay unit 125, and delays the added signal of the adder unit 106. The delay unit 102 to be applied and the coefficient unit 104 that multiplies the signal delayed by the delay unit 102 by the coefficient A1 are connected clockwise in this order, and the adder unit 106 receives the signal from the coefficient unit 104 and the delay unit 125 It is the structure which adds these signals.

更に、遅延部92、遅延部102、遅延部120の3つの遅延量は総てΔtaで同一に設定されており、また、遅延部125の遅延量Δtbは、遅延部92、102、120の遅延量Δtaの半分に設定されている。そして、効果音生成部50は第1のループ遅延部90の加算部96からの信号に係数部110の係数B2を乗じた信号と、第2のループ遅延部100の加算部106からの信号に係数部115の係数B1を乗じた信号との2種類の信号を入力して効果音信号を生成する構成となっている。そして、制御部61は、ステレオ信号の供給が停止されない通常時には係数部110、係数部115、係数部94および係数部104の係数B2、B1、A2を総て「0」とする一方、ステレオ信号の供給が停止される旨を示す信号であるイベント指令信号が与えられた場合には、係数部110及び係数部115の係数B2、係数B1を双方とも「1」とすると共に、係数部94及び係数部104の係数A2、係数A1を共に「−1」より大きく「1」より小さな値、例えば「0.6」とする構成となっている。   Further, the three delay amounts of the delay unit 92, the delay unit 102, and the delay unit 120 are all set to the same Δta, and the delay amount Δtb of the delay unit 125 is the delay amount of the delay units 92, 102, and 120. It is set to half of the amount Δta. Then, the sound effect generator 50 multiplies the signal from the adder 96 of the first loop delay unit 90 by the coefficient B2 of the coefficient unit 110 and the signal from the adder 106 of the second loop delay unit 100. A sound effect signal is generated by inputting two types of signals, the signal multiplied by the coefficient B1 of the coefficient unit 115. The control unit 61 sets the coefficients B2, B1, and A2 of the coefficient unit 110, the coefficient unit 115, the coefficient unit 94, and the coefficient unit 104 to “0” at the normal time when the supply of the stereo signal is not stopped. When the event command signal, which is a signal indicating that the supply of the signal is stopped, is given, both the coefficient B2 and the coefficient B1 of the coefficient unit 110 and the coefficient unit 115 are set to “1”, and the coefficient unit 94 and The coefficient A2 and the coefficient A1 of the coefficient unit 104 are both set to a value larger than “−1” and smaller than “1”, for example, “0.6”.

次に動作を説明する。制御部61は、通常時には係数部110の係数B2、係数部115の係数B1、係数部94の係数A2、係数部104の係数A1を総て「0」とする。この場合、ループ遅延部90及びループ遅延部100内での信号のループ遅延が行われないと共に、効果音生成部50へのループ遅延部90、ループ遅延部110からの信号は無効とされる。したがって、この場合にはステレオ音源部10からの音が加算部20、25に入力されてスピーカ40、スピーカ45からステレオ音が放音されるにすぎない。   Next, the operation will be described. The control unit 61 sets the coefficient B2 of the coefficient unit 110, the coefficient B1 of the coefficient unit 115, the coefficient A2 of the coefficient unit 94, and the coefficient A1 of the coefficient unit 104 to “0” in normal times. In this case, the loop delay of the signal in the loop delay unit 90 and the loop delay unit 100 is not performed, and the signals from the loop delay unit 90 and the loop delay unit 110 to the sound effect generation unit 50 are invalidated. Therefore, in this case, the sound from the stereo sound source unit 10 is only input to the addition units 20 and 25 and the stereo sound is emitted from the speakers 40 and 45.

次に、制御部61は、ステレオ信号の供給が停止される旨を示す信号であるイベント指令信号が与えられると、係数部110の係数B2及び係数部115の係数B1を「1」にすると共に、係数部94の係数A2及び係数部104の係数A1を「0.6」にする。この結果、先ず最初に、加算部106による加算結果が係数部115を介して効果音生成部50に入力され、これに応答して効果音生成部50が効果音を生成し、次いで、加算部96による加算結果が係数部110を介して効果音生成部50に入力され、これに応答して効果音生成部50が効果音を生成しする。まず、ループ遅延部100の加算部106からの信号が入力され、次いでループ遅延部90の加算部96からの信号が入力されるのは、遅延部125の遅延量Δtbが他の遅延部120の遅延量Δtaよりも小さく設定されているからである。   Next, when an event command signal which is a signal indicating that the supply of the stereo signal is stopped is given, the control unit 61 sets the coefficient B2 of the coefficient unit 110 and the coefficient B1 of the coefficient unit 115 to “1”. The coefficient A2 of the coefficient part 94 and the coefficient A1 of the coefficient part 104 are set to “0.6”. As a result, first, the addition result by the adding unit 106 is input to the sound effect generating unit 50 via the coefficient unit 115, and in response to this, the sound effect generating unit 50 generates the sound effect, and then the adding unit The result of addition by 96 is input to the sound effect generator 50 via the coefficient unit 110, and in response to this, the sound effect generator 50 generates a sound effect. First, the signal from the adder 106 of the loop delay unit 100 is input, and then the signal from the adder 96 of the loop delay unit 90 is input because the delay amount Δtb of the delay unit 125 is the same as that of the other delay units 120. This is because it is set smaller than the delay amount Δta.

以降、ループ遅延の効果が、ループ遅延部90とループ遅延部100とで独立して発揮される。先ず、ループ遅延部90では、遅延部92、係数部94および加算部96を符号B1で示すように循環した信号が順次、係数部110を介して効果音生成部50の一方の入力として入力される(符号V)。一方、ループ遅延部100では、遅延部102、係数部104および加算部106を符号B2で示すように循環した信号が順次、係数部115を介して効果音生成部50の他方の入力として入力される(符号W)。なお、係数部94の係数A2と係数部104の係数A1とは1未満の「0.6」であるため、遅延ループを周る度に信号が減衰して最終的には効果音生成部50に入力する信号は存在しなくなる。このように、効果音生成部50への入力は符号Vで示す入力と符号Wで示す入力は遅延部125の小さな遅延量分だけずれて交互に行われるので、この結果、奇抜な効果音の生成を行うことが可能となる。   Thereafter, the effect of the loop delay is exhibited independently by the loop delay unit 90 and the loop delay unit 100. First, in the loop delay unit 90, a signal obtained by circulating the delay unit 92, the coefficient unit 94, and the adder unit 96 as indicated by reference numeral B1 is sequentially input as one input of the sound effect generating unit 50 via the coefficient unit 110. (Reference V). On the other hand, in the loop delay unit 100, a signal obtained by circulating the delay unit 102, the coefficient unit 104, and the adder unit 106 as indicated by reference numeral B2 is sequentially input as the other input of the sound effect generation unit 50 via the coefficient unit 115. (Reference W). Since the coefficient A2 of the coefficient unit 94 and the coefficient A1 of the coefficient unit 104 are “0.6” which is less than 1, the signal attenuates every time it goes around the delay loop, and finally the sound effect generating unit 50 There is no signal input to. In this way, the input to the sound effect generating unit 50 is alternately performed with the input indicated by the symbol V and the input indicated by the symbol W being shifted by a small delay amount of the delay unit 125. Generation can be performed.

以上の説明ではステレオ音源部10は、LR2チャンネルの信号を出力するものとして説明してきたが、図1の加算部20、加算部25の入力に同一のモノラル音源の信号を加える構成としても本発明の効果を得ることができる。この場合は、左右同一波形のステレオ信号として扱われることになる。図5は、このタイプのステレオ音源部11の構成例を示している。モノラル音源部2000から出力されるモノラル音は、Lチャンネル係数乗算部2010によってLチャンネル用係数が乗じられ、これがLチャンネル用信号になると共に、Rチャンネル係数乗算部2020によってRチャンネル用係数が乗じられこれがLチャンネル用信号になる。このようにして、モノラル音を左右に振り分けてステレオ音源を生成するようにしても良い。   In the above description, the stereo sound source unit 10 has been described as outputting an LR2 channel signal. However, the present invention may be applied to a configuration in which the same monaural sound source signal is added to the inputs of the addition unit 20 and the addition unit 25 in FIG. The effect of can be obtained. In this case, the left and right waveforms are handled as stereo signals. FIG. 5 shows a configuration example of this type of stereo sound source unit 11. The monaural sound output from the monaural sound source unit 2000 is multiplied by an L channel coefficient by an L channel coefficient multiplication unit 2010, which becomes an L channel signal, and is multiplied by an R channel coefficient by an R channel coefficient multiplication unit 2020. This is an L channel signal. In this way, a stereo sound source may be generated by distributing monaural sounds to the left and right.

なお、音響装置1や音響装置2の主要部はCPUやDSPがROM等の記録媒体に記録されたプログラムをRAM等をワークエリアとして実行することによって実現することが可能である。そして、音響装置1や音響装置2は、ゲーム機や小型のステレオ再生機に適用可能である。   The main part of the audio device 1 or the audio device 2 can be realized by the CPU or DSP executing a program recorded on a recording medium such as a ROM using the RAM or the like as a work area. The audio device 1 and the audio device 2 can be applied to a game machine or a small stereo player.

以上説明してきたように、本発明の音響装置は、ゲーム機等のゲーム展開に応じて奇抜な効果音を発音させる用途等に利用することができる。   As described above, the acoustic device of the present invention can be used for the purpose of generating unusual sound effects according to game development of game machines and the like.

1 音響装置
2 音響装置
10 ステレオ音源部
11 ステレオ音源部
20 加算部
25 加算部
30 D/A変換器
35 D/A変換器
40 スピーカ
45 スピーカ
50 効果音生成部
60 制御部
61 制御部
70 ループ遅延部
80 加算部
90 ループ遅延部
100 ループ遅延部
1 sound equipment
2 sound device 10 stereo sound source unit 11 stereo sound source unit 20 adder unit 25 adder unit 30 D / A converter 35 D / A converter 40 speaker 45 speaker 50 sound effect generator 60 control unit 61 control unit 70 loop delay unit 80 addition Unit 90 loop delay unit 100 loop delay unit

Claims (3)

左信号および右信号からなるステレオ信号を出力するステレオ音源部と、
ステレオ信号を入力してループ状に信号を循環させるループ遅延部と、
このループ遅延部で遅延された信号を入力して、効果音信号を生成する効果音生成部と、前記ステレオ音源部からの左信号と前記効果音生成部からの効果音とを加算する第1の加算部と、前記ステレオ音源部からの右信号と前記効果音生成部からの効果音とを加算する第2の加算部と、自装置の動作制御をする制御部と、を備え、
前記制御部は、
前記ステレオ信号の供給が停止する旨を示す信号であるイベント指令信号が与えられない通常時には前記ステレオ音源部の左信号および右信号のみを夫々前記第1の加算部と前記第2の加算部に与える一方、前記イベント指令信号が与えられた場合には、前記ループ遅延部からの信号を前記効果音生成部へ2種類交互に入力させるようにして効果音生成部を起動させることを特徴とする音響装置。
A stereo sound source unit that outputs a stereo signal composed of a left signal and a right signal;
A loop delay unit that inputs a stereo signal and circulates the signal in a loop; and
A sound effect generator that generates a sound effect signal by inputting the signal delayed by the loop delay unit, and a first signal that adds the left signal from the stereo sound source unit and the sound effect from the sound effect generator A second addition unit that adds the right signal from the stereo sound source unit and the sound effect from the sound effect generation unit, and a control unit that controls the operation of the device itself,
The controller is
When an event command signal, which is a signal indicating that the supply of the stereo signal is stopped, is not given, only the left signal and the right signal of the stereo sound source unit are normally sent to the first adder unit and the second adder unit, respectively. On the other hand, when the event command signal is given, the sound effect generation unit is activated by alternately inputting two types of signals from the loop delay unit to the sound effect generation unit. Acoustic device.
請求項1に記載の音響装置において、
前記ループ遅延部は、
前記ステレオ音源部からの左信号と右信号との加算信号を第1の入力とする加算部(74)と、この加算部(74)の加算信号に対して遅延を与える遅延部(76)と、この遅延部(76)で遅延された信号に係数を乗じる係数部(78)と、この係数部(78)からの信号に対して遅延を与える遅延部(72)とをこの順番で接続し、前記加算部(74)は前記遅延部(72)からの信号の第2の入力として、前記第1の入力と前記第2の入力とを加算する構成とし、
前記効果音生成部は、
前記係数部(78)と前記遅延部(72)との接続点からの信号と前記加算部(74)の加算結果に係数を乗じる係数部(79)からの信号との2種類の信号を交互に入力して効果音信号を生成し、
前記制御部は、
通常時には前記係数部(79)および前記係数部(78)の係数を「0」とする一方、イベント指令信号が与えられた場合には、前記係数部(79)の係数を「1」とすると共に前記係数部(78)の係数を「−1」より大きく「1」より小さな値とすることを特徴とする音響装置。
The acoustic device according to claim 1,
The loop delay unit is
An adder (74) having as a first input an addition signal of the left signal and the right signal from the stereo sound source unit; and a delay unit (76) for delaying the add signal of the adder (74) A coefficient part (78) for multiplying the signal delayed by the delay part (76) by a coefficient and a delay part (72) for delaying the signal from the coefficient part (78) are connected in this order. The addition unit (74) is configured to add the first input and the second input as a second input of the signal from the delay unit (72),
The sound effect generator
Two types of signals, a signal from the connection point between the coefficient unit (78) and the delay unit (72), and a signal from the coefficient unit (79) for multiplying the addition result of the addition unit (74) by a coefficient are alternately used. To generate a sound effect signal,
The controller is
Normally, the coefficients of the coefficient part (79) and the coefficient part (78) are set to “0”, whereas when an event command signal is given, the coefficient of the coefficient part (79) is set to “1”. The acoustic device is characterized in that the coefficient of the coefficient part (78) is set to a value larger than “−1” and smaller than “1”.
請求項1に記載の音響装置において、
前記ループ遅延部は、第1のループ遅延部(90)と第2のループ遅延部(100)とから成り、
前記第1のループ遅延部(90)は、
前記ステレオ音源部からの左信号を遅延部(120)で遅延させた信号を第1の入力とする加算部(96)と、この加算部(96)の加算信号に対して遅延を与える遅延部(92)と、この遅延部(92)で遅延された信号に係数を乗じる係数部(94)とをこの順番で接続して、前記加算部(96)は前記係数部(96)からの信号を第2の入力として、前記第1の入力と前記第2の入力とを加算する構成とし、
前記第2のループ遅延部(100)は、
前記ステレオ音源部からの左信号を遅延部(125)で遅延させた信号を第1の入力とする加算部(106)と、この加算部(106)の加算信号に対して遅延を与える遅延部(102)と、この遅延部(102)で遅延された信号に係数を乗じる係数部(104)とをこの順番で接続して、前記加算部(106)は前記係数部(104)からの信号の第2の入力として、前記第1の入力と前記第2の入力とを加算する構成とし、
更に、前記遅延部(125)の遅延量を前記遅延部(120)の遅延量より小さく設定し、
前記前記効果音生成部は、
前記第1のループ遅延部(90)の加算部(96)からの信号に係数を乗じた信号と、前記第2のループ遅延部(100)の加算部(106)からの信号に係数を乗じた信号との2種類の信号を交互に入力して効果音信号を生成し、
前記制御部は、
通常時には前記係数部(110)、前記係数部(115)、前記係数部(94)および前記係数部(104)の4つの係数を「0」とする一方、イベント指令信号が与えられた場合には、前記係数部(110)及び前記係数部(115)の係数を「1」とすると共に、前記係数部(94)及び前記係数部(104)の係数を「−1」より大きく「1」より小さな値とすることを特徴とする音響装置。
The acoustic device according to claim 1,
The loop delay unit includes a first loop delay unit (90) and a second loop delay unit (100).
The first loop delay unit (90)
An adder (96) having as a first input a signal obtained by delaying the left signal from the stereo sound source unit by the delay unit (120), and a delay unit for delaying the added signal of the adder (96) (92) and a coefficient unit (94) for multiplying the signal delayed by the delay unit (92) by a coefficient in this order, and the adding unit (96) receives the signal from the coefficient unit (96). As a second input, the first input and the second input are added together,
The second loop delay unit (100) includes:
An adder (106) having a signal obtained by delaying the left signal from the stereo sound source unit by the delay unit (125) as a first input, and a delay unit for delaying the added signal of the adder (106) (102) and a coefficient unit (104) that multiplies the signal delayed by the delay unit (102) in this order, and the addition unit (106) receives the signal from the coefficient unit (104). As the second input, the first input and the second input are added.
Furthermore, the delay amount of the delay unit (125) is set smaller than the delay amount of the delay unit (120),
The sound effect generator includes:
A signal obtained by multiplying the signal from the adder (96) of the first loop delay unit (90) by a coefficient and a signal from the adder (106) of the second loop delay unit (100) are multiplied by a coefficient. The sound signal is generated by alternately inputting two types of signals, i.e.
The controller is
Normally, when the coefficient part (110), the coefficient part (115), the coefficient part (94), and the coefficient part (104) are set to “0”, an event command signal is given. The coefficient of the coefficient part (110) and the coefficient part (115) is “1”, and the coefficient of the coefficient part (94) and the coefficient part (104) is larger than “−1” and “1”. An acoustic device characterized by a smaller value.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014033376A (en) * 2012-08-04 2014-02-20 Korg Inc Sound effect device

Citations (1)

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JPH0537478A (en) * 1991-07-31 1993-02-12 Fujitsu Ten Ltd Field controller

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0537478A (en) * 1991-07-31 1993-02-12 Fujitsu Ten Ltd Field controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014033376A (en) * 2012-08-04 2014-02-20 Korg Inc Sound effect device

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