JPH05191894A - Reverberation adder - Google Patents

Reverberation adder

Info

Publication number
JPH05191894A
JPH05191894A JP4005519A JP551992A JPH05191894A JP H05191894 A JPH05191894 A JP H05191894A JP 4005519 A JP4005519 A JP 4005519A JP 551992 A JP551992 A JP 551992A JP H05191894 A JPH05191894 A JP H05191894A
Authority
JP
Japan
Prior art keywords
reverberation
signal
pattern
delay
adder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP4005519A
Other languages
Japanese (ja)
Inventor
Hiroshi Kowaki
宏 小脇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Ten Ltd
Original Assignee
Denso Ten Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Ten Ltd filed Critical Denso Ten Ltd
Priority to JP4005519A priority Critical patent/JPH05191894A/en
Publication of JPH05191894A publication Critical patent/JPH05191894A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K15/00Acoustics not otherwise provided for
    • G10K15/08Arrangements for producing a reverberation or echo sound
    • G10K15/12Arrangements for producing a reverberation or echo sound using electronic time-delay networks

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Stereophonic System (AREA)
  • Reverberation, Karaoke And Other Acoustics (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE:To substantially reduce reverberation time, to reduce a localization feeling and to form more natural reverberation by alternately replacing part of respective reverberation patterns to be formed. CONSTITUTION:A signal from an arbitrary tap of an FIR filter adding the reverberation pattern to respective stereo input signals L and R, respectively, is delayed and its amplitude is adjusted, the adjusted signals are crossed and fed back to the input of the respective FIR filters facing with each other, and the reverberation pattern is formed from the feedback signal. In such a case, part of the reverberation patterns to be outputted from an adder 7 are supplied by a multiplier 6. At the same time, part of the reverberation pattern to be outputted from an adder 8 are supplied. Thus, the time intervals between the reverberation patterns whose right and left reverberation sound is crossed which is outputted from the FIR filter can be shortened and periodicity can be reduced.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はステレオ入力信号に残響
信号を付加する残響付加装置に関する。特に本発明では
残響パターンを形成するFIRフィルタの後部タップか
らの信号等を相互に交差して帰還して形成した各左右ス
テレオ出力信号の残響パターンについて定位感を低減す
ることを目的とする。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reverberation adding device for adding a reverberation signal to a stereo input signal. Particularly, it is an object of the present invention to reduce the sense of localization of the reverberation pattern of each of the left and right stereo output signals formed by crossing the signals from the rear taps of the FIR filter forming the reverberation pattern and returning them.

【0002】[0002]

【従来の技術】従来このような分野の技術として特開昭
61−169897号公報に記載されたものがある。こ
れは遅延回路をフィードバックループに備えた残響付加
装置においてフィードバックループの帰還を準静的に変
化させカラレーションの低減を図るものである。すなわ
ちカラレーションを低減するために、遅延して帰還する
残響信号の遅延時間を大きくしさらにフラッタエコーの
低減のために遅延回路と振幅調整回路を複数並列に接続
して残響密度を高くしている。
2. Description of the Related Art Conventionally, as a technique in such a field, there is one described in JP-A-61-169897. This is to reduce the coloration by changing the feedback of the feedback loop quasi-statically in the reverberation adding device including the delay circuit in the feedback loop. That is, in order to reduce coloration, the delay time of the reverberation signal that is delayed and returned is increased, and in order to reduce flutter echo, a plurality of delay circuits and amplitude adjustment circuits are connected in parallel to increase the reverberation density. ..

【0003】ところで従来技術におけるカラレーション
低減をステレオ再生に適用する例として本発明の前提と
して次のようなものがある。図4は本発明の前提となる
残響付加装置を示す図である。本図に示す残響付加装置
は、一方にディジタルのステレオ信号(L,R)を入力
する加算器1及び2と、該加算器1及び2からの信号を
入力し、例えば1サンプリング周期毎にディジタル信号
を遅延し、出力用のマルチタップを具備する、例えばR
AM(RandomAccess Memory) のようなデイレイメモリ
3及び4と、該デイレイメモリ3及び4の前記マルチタ
ップに接続される複数の乗算器5及び6と、各該複数の
乗算器5及び6の出力を加算してステレオ用出力信号
(L,R)を形成する加算器7及び8と、前記デイレイ
メモリ3及び4の後部タップからの信号を所定時間遅延
する遅延器9及び10と、該遅延器9及び10による遅
延信号の振幅を調整して振幅調整された信号を前記加算
器2及び1の他方の入力に交差して帰還する乗算器11
及び12とを含む。
By the way, as an example of applying the coloration reduction in the prior art to stereo reproduction, there is the following as a premise of the present invention. FIG. 4 is a diagram showing a reverberation adding apparatus which is a premise of the present invention. The reverberation adding apparatus shown in this figure inputs adders 1 and 2 for inputting a digital stereo signal (L, R) to one side, and signals from the adders 1 and 2 and, for example, digitally at every sampling cycle. Delay signal and have multi-tap for output, eg R
A delay memory 3 or 4 such as an AM (Random Access Memory), a plurality of multipliers 5 and 6 connected to the multi-tap of the delay memories 3 and 4, and an output of each of the plurality of multipliers 5 and 6 Adders 7 and 8 that add to form a stereo output signal (L, R), delay units 9 and 10 that delay the signals from the rear taps of the delay memories 3 and 4 for a predetermined time, and the delay unit 9 And a multiplier 11 for adjusting the amplitude of the delayed signal and crossing the amplitude-adjusted signal to the other input of the adders 2 and 1 for feedback.
And 12 are included.

【0004】上記残響付加装置はディジタルシグナルプ
ロセッサ(DSP)で構成される。デイレイメモリ3、
乗算器5及び加算器7、デイレイメモリ4、乗算器6及
び加算器8とで構成されるものはそれぞれFIRフィル
タといわれるものである。図5は図4の本発明の前提と
なる残響付加装置の動作を説明するための残響パターン
を示す図である。本図(a)は前記加算器7の出力パタ
ーンを示し、本図(b)は前記加算器8の出力の残響パ
ターンを示す。本図(a)及び(b)に示すように、乗
算器5及び6で左右独立に演算を行う各FIRフィルタ
による初期部の残響パターンを形成し又、遅延された信
号を対向するFIRフィルタに入力し交差するように帰
還しカラレーションの低減を図ろうとしている。すなわ
ちこのようにステレオ信号を交差して帰還させるのは、
従来技術(特開昭61−169897号)に示すように
FIRフィルタの出力信号を単に帰還したのでは、FI
Rフィルタの乗算器5及び6で形成された同一の残響パ
ターンが繰り返されて信号処理上周期性が生じるのでこ
れを防止し、自然な残響を得ようとするためである。
The reverberation adding device is composed of a digital signal processor (DSP). Day memory 3,
Each of the multiplier 5, the adder 7, the delay memory 4, the multiplier 6, and the adder 8 is called an FIR filter. FIG. 5 is a diagram showing a reverberation pattern for explaining the operation of the reverberation adding apparatus which is the premise of the present invention in FIG. The figure (a) shows the output pattern of the adder 7, and the figure (b) shows the reverberation pattern of the output of the adder 8. As shown in (a) and (b) of this figure, the reverberation pattern of the initial part is formed by each FIR filter that performs the left and right independent operations by the multipliers 5 and 6, and the delayed signal is formed in the opposite FIR filter. It tries to reduce the coloration by inputting and returning so that they intersect. In other words, in this way, crossing a stereo signal and returning it is
If the output signal of the FIR filter is simply fed back as shown in the prior art (Japanese Patent Laid-Open No. 61-169897), FI
This is because the same reverberation pattern formed by the multipliers 5 and 6 of the R filter is repeated to cause periodicity in signal processing, and this is prevented to obtain natural reverberation.

【0005】[0005]

【発明が解決しようとする課題】しかしながら従来の残
響付加装置ではさらにカラレーションを低減しかつ残響
音の高密度化を維持するために各FIRフィルタの残響
パターンの時間間隔すなわち遅延時間を長くすると、各
左右ステレオ出力信号に交互に現れる残響パターンに周
期性が現れ定位感による不自然感を伴う場合がある。
However, in the conventional reverberation adding device, if the time interval of the reverberation pattern of each FIR filter, that is, the delay time is made longer in order to further reduce the coloration and maintain the high density of the reverberation sound, In some cases, reverberation patterns appearing alternately in each of the left and right stereo output signals have periodicity, which is accompanied by an unnatural feeling due to localization.

【0006】したがって本発明は、上記問題点に鑑みて
カラレーションを低減しかつ残響音の高密度化を得ると
ともにFIRフィルタの周期性を少なくできるステレオ
用の残響音を形成できる残響付加装置を提供することを
目的とする。
Therefore, in view of the above problems, the present invention provides a reverberation adding device capable of forming a reverberation sound for stereo in which the coloration can be reduced and the reverberation sound can be densified and the periodicity of the FIR filter can be reduced. The purpose is to do.

【0007】[0007]

【課題を解決するための手段】本発明は前記問題点を解
決するために、各ステレオ入力信号にそれぞれ残響パタ
ーンを付加するFIRフィルタの任意のタップからの信
号を遅延し振幅を調整しこの調整された信号を交差して
対向する各該FIRフィルタの入力に帰還し該帰還信号
により残響パターンを形成する残響付加装置において、
各前記FIRフィルタからの各ステレオ出力信号の残響
パターン間の残響信号の一部を交互に入れ換える。
In order to solve the above problems, the present invention delays a signal from an arbitrary tap of an FIR filter for adding a reverberation pattern to each stereo input signal, adjusts the amplitude, and adjusts the amplitude. In a reverberation adding device for forming a reverberation pattern by the feedback signals by returning the crossed signals to the inputs of the respective FIR filters that face each other,
Some of the reverberation signals between the reverberation patterns of each stereo output signal from each said FIR filter are interchanged.

【0008】[0008]

【作用】本発明の残響付加装置によれば、各ステレオ入
力信号について交互に形成される各ステレオ信号の残響
パターン間の残響信号の一部を交互に入れ換えて遅延時
間を長くしかつ残響パターンの時間間隔を短くできるこ
とにより、従来FIRフィルタ毎の信号処理上の定位感
があったが、この定位感が減少しより自然な残響が形成
できるようになった。
According to the reverberation adding device of the present invention, a part of the reverberation signals between the reverberation patterns of the stereo signals which are alternately formed for each stereo input signal are alternately replaced to increase the delay time and reduce the reverberation pattern. By being able to shorten the time interval, there was a sense of localization in the signal processing of each FIR filter in the past, but this sense of localization was reduced and more natural reverberation could be formed.

【0009】[0009]

【実施例】以下本発明の実施例について図面を参照して
説明する。図1は本発明の実施例に係る残響付加装置を
示す図である。本図に示す残響付加装置は、一方にディ
ジタルのステレオ信号(L、R)を入力する加算器1及
び2と、該加算器1及び2からの信号を入力し、例えば
1サンプリング周期毎にディジタル信号を遅延し、出力
用のマルチタップを具備する、例えばRAM(Random
Access Memory) のようなデイレイメモリ3及び4と、
該デイレイメモリ3及び4の前記マルチタップに接続さ
れる複数の乗算器5及び6と、該複数の乗算器5の出力
の大部分と前記複数の乗算器6の出力の一部とを加算し
てステレオ用出力信号(L)を形成する加算器7と、前
記乗算器6の出力の大部分と前記乗算器5の出力の一部
とを加算してステレオ用出力信号(R)形成する加算器
8と、前記デイレイメモリ3及び4の任意のタップ(本
実施例では最終段のタップ)からの信号を所定時間遅延
する遅延器9及び10と、該遅延器9及び10による遅
延信号の振幅を調整して振幅調整された信号を前記加算
器2及び1の他方の入力に交差して帰還する乗算器11
及び12とを含む。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a reverberation adding apparatus according to an embodiment of the present invention. The reverberation adding device shown in the figure has adders 1 and 2 for inputting a digital stereo signal (L, R) to one side, and signals from the adders 1 and 2 for inputting, for example, digital signals every sampling period. A signal is delayed and a multi-tap for output is provided, for example, a RAM (Random
Access memories) such as delay memories 3 and 4,
A plurality of multipliers 5 and 6 connected to the multi-tap of the delay memories 3 and 4 are added, and most of outputs of the plurality of multipliers 5 and a part of outputs of the plurality of multipliers 6 are added. And an adder 7 that forms a stereo output signal (L), and an addition that forms a stereo output signal (R) by adding the majority of the output of the multiplier 6 and a part of the output of the multiplier 5. Unit 8, delay units 9 and 10 for delaying a signal from an arbitrary tap (the final stage tap in this embodiment) of the delay memories 3 and 4, and the amplitude of the delay signal by the delay units 9 and 10. A multiplier 11 that crosses the other input of the adders 2 and 1 and feeds back the amplitude-adjusted signal
And 12 are included.

【0010】前述したように、上記残響付加装置はディ
ジタルシグナルプロセッサ(DSP)で構成され、デイ
レイメモリ3、乗算器5及び加算器7、デイレイメモリ
4、乗算器6及び加算器8とで構成されるものはそれぞ
れFIRフィルタといわれるものである。図2は図1の
本発明の残響付加装置の動作を説明するための各ステレ
オ信号の残響パターンを示す図であり、図2は図1の各
残響パターンのうち一部の入れ換えを説明する図であ
る。図2(a)は前記加算器7の出力パターンを示し、
図2(b)は前記加算器8の出力の残響パターンを示
す。図2(a)及び(b)に示すように、乗算器5及び
6で左右独立に演算を行う各FIRフィルタの初期部の
残響パターン出力を形成し残響パターン形成後に各ディ
ジタルメモリ3及び4の後部タップの信号を他方のディ
ジタルメモリ4及び3の入力に交差するように帰還しそ
の遅延帰還時間及び振幅を調整してカラレーションの低
減を図ろうとしている。すなわち入力信号(L)が前記
デイレイメモリ3で1サンプリング周期づつ遅延し、タ
ップから遅延信号が取り出され前記乗算器5により遅延
が進む程に振幅が小さくなるように調整されてこのよう
に調整された信号が前記加算器7によりたたみこまれて
残響パターンとしてステレオ信号(L)が形成される。
前記デイレイメモリ3での遅延が終了した信号が前記遅
延器9により遅延されて前記乗算器11により振幅を調
整されて前記デイレイメモリ4への入力信号になる。こ
の入力信号は上記と同様にして残響パターンとしてステ
レオ信号(R)を形成し、前記デイレイメモリ4での遅
延が終了した信号が前記遅延器10および乗算器12を
介して前記デイレイメモリ3への入力信号になる。図3
に示すような信号の処理において前記加算器7から出力
される残響パターンのうち一部が前記乗算器6から供給
される。同様に前記加算器8から出力される残響パター
ンのうち一部が前記乗算器5から供給される。このため
FIRフィルタにより形成される左右の残響音が交差す
る残響パターンの時間間隔を実質的に短く設定でき周期
性を少なくできる。よって従来各ステレオ出力信号では
左右のFIRフィルタの残響パターンが交互に現れて定
位感が生じるが、各FIRフィルタでの形成される残響
パターンの一部が左右入れ換えられることによって上記
定位感が少なくなり自然な残響信号が形成できることに
なる。したがって、本実施例におけるFIRフィルタを
用いることにより、カラレーションが少なくかつ周期性
の少ない残響付加装置を提供できる。
As described above, the reverberation adding device is composed of a digital signal processor (DSP), and is composed of the delay memory 3, the multiplier 5 and the adder 7, the delay memory 4, the multiplier 6 and the adder 8. Each one is called an FIR filter. 2 is a diagram showing a reverberation pattern of each stereo signal for explaining the operation of the reverberation adding apparatus of the present invention in FIG. 1, and FIG. 2 is a diagram for explaining replacement of a part of each reverberation pattern in FIG. Is. FIG. 2A shows an output pattern of the adder 7,
FIG. 2B shows the reverberation pattern of the output of the adder 8. As shown in FIGS. 2A and 2B, the reverberation pattern output of the initial part of each FIR filter, which is operated independently by the multipliers 5 and 6, is formed. The signal of the rear tap is fed back so as to cross the inputs of the other digital memories 4 and 3, and the delay feedback time and amplitude thereof are adjusted to reduce the coloration. That is, the input signal (L) is delayed by one sampling cycle in the delay memory 3, the delay signal is taken out from the tap, and the multiplier 5 adjusts the amplitude so that it becomes smaller as the delay progresses. The added signal is convolved by the adder 7 to form a stereo signal (L) as a reverberation pattern.
The signal whose delay has been completed in the delay memory 3 is delayed by the delay device 9 and the amplitude thereof is adjusted by the multiplier 11 to become an input signal to the delay memory 4. This input signal forms a stereo signal (R) as a reverberation pattern in the same manner as described above, and the signal whose delay has been completed in the delay memory 4 is sent to the delay memory 3 via the delay device 10 and the multiplier 12. It becomes an input signal. Figure 3
A part of the reverberation pattern output from the adder 7 in the processing of the signal as shown in is supplied from the multiplier 6. Similarly, a part of the reverberation pattern output from the adder 8 is supplied from the multiplier 5. Therefore, the time interval of the reverberation pattern where the left and right reverberations formed by the FIR filter intersect can be set to be substantially short, and the periodicity can be reduced. Therefore, conventionally, in each stereo output signal, the reverberation patterns of the left and right FIR filters alternately appear to give a sense of localization. A natural reverberation signal can be formed. Therefore, by using the FIR filter according to the present embodiment, it is possible to provide a reverberation adding device with less coloration and less periodicity.

【0011】[0011]

【発明の効果】以下説明したように本発明によれば、各
ステレオ入力信号についてFIRフィルタで残響パター
ンを形成し、残響パターン形成後の信号等を交互にFI
Rフィルタに帰還して各ステレオ信号を入れ換えて形成
される各残響パターンの一部を交互に入れ換えることに
より、残響時間が実質的に短くなり定位感が少なくなり
より自然な残響が形成できるようになった。
As described below, according to the present invention, a reverberation pattern is formed by an FIR filter for each stereo input signal, and signals after the reverberation pattern are formed are alternately FI.
By alternately exchanging some of the reverberation patterns that are formed by exchanging the stereo signals by returning to the R filter, the reverberation time is substantially shortened, the localization feeling is reduced, and more natural reverberation can be formed. became.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例に係る残響付加装置を示す図で
ある。
FIG. 1 is a diagram showing a reverberation adding apparatus according to an embodiment of the present invention.

【図2】図1の本発明の残響付加装置の動作を説明する
ための各ステレオ信号の残響パターンを示す図である。
FIG. 2 is a diagram showing a reverberation pattern of each stereo signal for explaining the operation of the reverberation adding apparatus of the present invention in FIG.

【図3】図2の各残響パターンのうち一部の入れ換えを
説明する図である。
FIG. 3 is a diagram illustrating replacement of some of the reverberation patterns in FIG.

【図4】本発明の前提となる残響付加装置を示す図であ
る。
FIG. 4 is a diagram showing a reverberation adding device which is a premise of the present invention.

【図5】図4の本発明の前提となる残響付加装置の動作
を説明するための残響パターンを示す図である。
5 is a diagram showing a reverberation pattern for explaining the operation of the reverberation adding apparatus which is the premise of the present invention in FIG. 4;

【符号の説明】[Explanation of symbols]

1,2,7,8…加算器 3,4…デイレイメモリ 5,6,11,12…乗算器 9,10…遅延器 1, 2, 7, 8 ... Adder 3, 4 ... Delay memory 5, 6, 11, 12 ... Multiplier 9, 10 ... Delay device

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 H04R 3/12 Z 8622−5H ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location H04R 3/12 Z 8622-5H

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 各ステレオ入力信号にそれぞれ残響パタ
ーンを付加するFIRフィルタの任意のタップからの信
号を遅延し振幅を調整しこの調整された信号を交差して
対向する各該FIRフィルタの入力に帰還し該帰還信号
により残響パターンを形成する残響付加装置において、 各前記FIRフィルタからの各ステレオ出力信号の残響
パターン間の残響信号の一部を交互に入れ換えることを
特徴とする残響付加装置。
1. A signal from an arbitrary tap of an FIR filter for adding a reverberation pattern to each stereo input signal is delayed, the amplitude is adjusted, and the adjusted signal is applied to the input of each of the opposed FIR filters. A reverberation adding device which returns and forms a reverberation pattern by the feedback signal, wherein a part of the reverberation signals between the reverberation patterns of the stereo output signals from the respective FIR filters are alternately replaced.
JP4005519A 1992-01-16 1992-01-16 Reverberation adder Withdrawn JPH05191894A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4005519A JPH05191894A (en) 1992-01-16 1992-01-16 Reverberation adder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4005519A JPH05191894A (en) 1992-01-16 1992-01-16 Reverberation adder

Publications (1)

Publication Number Publication Date
JPH05191894A true JPH05191894A (en) 1993-07-30

Family

ID=11613441

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4005519A Withdrawn JPH05191894A (en) 1992-01-16 1992-01-16 Reverberation adder

Country Status (1)

Country Link
JP (1) JPH05191894A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6285766B1 (en) 1997-06-30 2001-09-04 Matsushita Electric Industrial Co., Ltd. Apparatus for localization of sound image
US8036389B2 (en) * 2005-09-26 2011-10-11 Samsung Electronics Co., Ltd. Apparatus and method of canceling vocal component in an audio signal
JP2015064597A (en) * 2009-10-21 2015-04-09 フラウンホッファー−ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー.ファオ Reverberation device and method of reverberating audio signal

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6285766B1 (en) 1997-06-30 2001-09-04 Matsushita Electric Industrial Co., Ltd. Apparatus for localization of sound image
US8036389B2 (en) * 2005-09-26 2011-10-11 Samsung Electronics Co., Ltd. Apparatus and method of canceling vocal component in an audio signal
JP2015064597A (en) * 2009-10-21 2015-04-09 フラウンホッファー−ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー.ファオ Reverberation device and method of reverberating audio signal
US9245520B2 (en) 2009-10-21 2016-01-26 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Reverberator and method for reverberating an audio signal
JP2016197252A (en) * 2009-10-21 2016-11-24 フラウンホッファー−ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー.ファオ Reverberation device and method for reverberating audio signal
US9747888B2 (en) 2009-10-21 2017-08-29 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Reverberator and method for reverberating an audio signal
US10043509B2 (en) 2009-10-21 2018-08-07 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandtem Forschung E.V. Reverberator and method for reverberating an audio signal

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