JPS599273Y2 - Filter circuit in electric musical instruments - Google Patents
Filter circuit in electric musical instrumentsInfo
- Publication number
- JPS599273Y2 JPS599273Y2 JP4171378U JP4171378U JPS599273Y2 JP S599273 Y2 JPS599273 Y2 JP S599273Y2 JP 4171378 U JP4171378 U JP 4171378U JP 4171378 U JP4171378 U JP 4171378U JP S599273 Y2 JPS599273 Y2 JP S599273Y2
- Authority
- JP
- Japan
- Prior art keywords
- low
- electric
- electric musical
- filter circuit
- strings
- 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.)
- Expired
Links
Landscapes
- Filters And Equalizers (AREA)
Description
【考案の詳細な説明】
本考案は電気楽器例えば弦式電気ピアノのフィルタ回路
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filter circuit for an electric musical instrument, such as a stringed electric piano.
ピアノは、駒、響板等の損失を持っているので音の減衰
が早いのに対し、弦式電気ピアノはインシュレータ、フ
レーム等の損失の少ないもので構威されているために減
衰が遅いという欠点があった。Pianos have loss in the bridges, soundboard, etc., so the sound decays quickly, whereas string electric pianos have insulators, frames, and other components with low loss, so the sound decays slowly. There were drawbacks.
そこで例えば第1図に示すようにチューニングピン1及
びプレツシャバ−2の近くに減衰材3を介在したコ字形
フレーム4を配置し、弦5をこのフレーム4の上部に設
けた第1の支持点6と第2の支持点7の上に張設するか
又は弦5をフレーム上に減衰材を介して取付けた第1の
支持点とこれと間隔を置いて固定した第2の支持点に張
設することによりピックアップ8を介しピアノとは・゛
同様の減衰エンベロープの楽音を取出すことができたが
、これに伴い高い倍音のレベルが第2図Aに示すように
非常に小さくなってしまった。Therefore, for example, as shown in FIG. 1, a U-shaped frame 4 with a damping material 3 interposed near the tuning pin 1 and pressure bar 2 is arranged, and the string 5 is attached to a first support point 6 provided at the upper part of the frame 4. and a second support point 7, or the string 5 is stretched between a first support point attached to the frame via a damping material and a second support point fixed at a distance therefrom. By doing so, it was possible to extract musical tones with a damping envelope similar to that of a piano through the pickup 8, but as a result, the level of high overtones became extremely low as shown in Figure 2A.
(第2図Bはフレームに設けた弦枕の上に弦を張設した
もののエンベロープ特性)このためにフォルテで弾いた
時、フォルテの感じが出にくくピアノあるいはピアニシ
モと同じような音色で聞えてしまい実際のピアノでえぐ
られるダイナミックレンジ感(ピアニシモでは丸い感じ
の音、フォルテシモでは輝きのある音色になるというよ
うに音の大小によって音色が変化するときの聴感をいう
)に欠けた音になる傾向があった。(Figure 2B shows the envelope characteristics of the strings strung on a string pillow installed in the frame.) For this reason, when played on a forte, it is difficult to get a forte feel, and the tone is similar to that of a piano or pianissimo. However, the sound tends to lack the sense of dynamic range (the sense of hearing when the tone changes depending on the size of the sound, such as a round sound in pianissimo and a bright tone in fortissimo), which is the result of an actual piano. was there.
本考案はピアノとほぼ同様の減衰エンペロープをうろこ
とができるとともにダイナミックレンジ感もえられる弦
式電気ピアノを提供することを目的とするもので、弦を
フレームに張設すると共に該弦の支持点とフレームとの
間に減衰材を介挿し、弦の振動をピックアップにより電
気信号に変換しスピーカ等から放音する式の電気楽器に
おいて、前記ピックアップとスピーカ等との接続回路に
、各鍵の基本周波数の低次高調波以上をカットする複数
個の低域フィルタと該低域フィルタと並列に接続された
2000 Hz乃至10000 Hzに共振点を有する
帯域フィルタとを介入したことを特徴とする。The purpose of the present invention is to provide a string-type electric piano that can move through a damping envelope similar to that of a piano while also providing a sense of dynamic range. In an electric instrument in which a damping material is inserted between the frame and the string vibration is converted into an electric signal by a pickup and the sound is emitted from a speaker, etc., the fundamental frequency of each key is connected to the connection circuit between the pickup and the speaker, etc. The present invention is characterized by intervening a plurality of low-pass filters that cut low-order harmonics or higher, and a bandpass filter having a resonance point between 2000 Hz and 10000 Hz, which is connected in parallel with the low-pass filters.
本考案は、ダイナミックレンジ感を与えるには(1)倍
音構成(高調波)特に2000 Hz以上の倍音(高調
波)が変化すルコと、(2) 2000 Hz乃至10
000 Hzまでの間の高次高調波のうち数個の倍音レ
ベルが基本波レベルから200 dB以上小さくならな
いこと(レベルがあまり小さいとマスキングされてしま
うからである。In this invention, in order to give a sense of dynamic range, (1) the overtone composition (harmonics), especially the overtones (harmonics) above 2000 Hz change, and (2) the harmonics from 2000 Hz to 10
The level of several harmonics among the higher harmonics up to 000 Hz must not be lower than 200 dB from the fundamental wave level (this is because if the level is too low, they will be masked).
)が必要であるという研究結果に基礎を置くものである
。) is necessary.
以下、本考案の一実施例を第3図について説明する。An embodiment of the present invention will be described below with reference to FIG.
PU1・・・は各鍵の押圧によって弦の振動に対応した
出力を発生する圧電素子から或るピックアップ、10は
インピーダンス変換器、11は2000 Hzから10
000 Hzまでに共振点を有する帯域フィルタ(BP
F)、12は各鍵の基本周波数以上の倍音(各鍵の基本
周波数の低次高調波以上)をカットする低域フィルタ(
LPF)である。PU1... is a certain pickup from a piezoelectric element that generates an output corresponding to the vibration of the string by pressing each key, 10 is an impedance converter, and 11 is a pickup from 2000 Hz to 10
A bandpass filter (BP) with a resonance point up to 000 Hz
F), 12 is a low-pass filter (
LPF).
帯域フィルタ11及び低域フィルタ12の共振周波数(
fR及びカットオフ周波数fcの設定例を次の表に示す
。The resonance frequency of the bandpass filter 11 and the low-pass filter 12 (
Setting examples of fR and cutoff frequency fc are shown in the following table.
図に示すように、Aエ乃至A2の13鍵に対応するピツ
クアツフ゜PU1乃至PU13・・・A#乃至A3の1
2鍵に対応するピックアップPU74乃至PU85各グ
ルーフ゜のピツクアツフ゜出力を各インピーダンス変換
器10を通じてミキシングし、各低域フィルタ12に通
すことにより、マスキング要素として働く低い倍音がカ
ットされ、各鍵の基本周波数のみが強調されて出力し、
一方、各ピツクアツフ゜の出力をインピーダンス変換器
10を通じてすべてミキシングし共通の帯域フィルタ1
1に通すことにより2000 Hz乃至10000 H
zまでの高調波のみが強調されて出力し、その合歳出力
が増幅器を経てスピーカにカロわるので゛、スピーカか
らピアノのように澄んだかつダイナミック感のある音色
の楽音が放音される。As shown in the figure, pick up files PU1 to PU13 corresponding to 13 keys of A to A2...1 to A# to A3
By mixing the pick-up outputs of each group of pickups PU74 to PU85 corresponding to two keys through each impedance converter 10 and passing it through each low-pass filter 12, low overtones that act as masking elements are cut, and only the fundamental frequency of each key is mixed. is highlighted and output,
On the other hand, the outputs of each pickup are all mixed together through an impedance converter 10 and a common bandpass filter 1
2000 Hz to 10000 H by passing through
Only the harmonics up to z are emphasized and output, and the combined output is transferred to the speaker via an amplifier, so that the speaker emits a clear and dynamic musical tone like a piano.
このように本考案はピアノのように減衰が早く且つダイ
ナミックレンジ感の有る音色を有する楽音をうろことが
できるという効果かえられる。In this way, the present invention has the advantage of being able to produce musical tones that decay quickly and have a sense of dynamic range, like a piano.
第1図は本考案に使用する電気楽器の一例の側面図、第
2図は電気楽音の減衰特性、第3図は本考案の電気楽器
のフィルタ回路の電気回路図である。
3・・・減衰材、4・・・コ字形フレーム、6・・・第
1の支持点、7・・・第2の支持点、8・・・ピックア
ップ、10・・・インピーダンス変換器、11・・・帯
域フィルタ、12・・・低域フィルタ、PU・・・圧電
素子ピックアップ。FIG. 1 is a side view of an example of an electric musical instrument used in the present invention, FIG. 2 is an attenuation characteristic of an electric musical tone, and FIG. 3 is an electric circuit diagram of a filter circuit of the electric musical instrument of the present invention. 3... Damping material, 4... U-shaped frame, 6... First support point, 7... Second support point, 8... Pickup, 10... Impedance converter, 11 ...Band filter, 12...Low pass filter, PU...Piezoelectric element pickup.
Claims (1)
との間に減衰材を介挿し、弦の振動をピックアップによ
り電気信号に変換しスピーカ等から放音する式の電気楽
器において、前記ピックアップとスピーカ等との接続回
路に、各鍵の基本周波数の低次高調波以上をカットする
複数個の低域フィルタと該低域フィルタと並列に接続さ
れた2000 Hz乃至10000 Hzに共振点を有
する帯域フィルタとを介入したことを特徴とする電気楽
器におけるフィルタ回路。In an electric musical instrument in which strings are stretched on a frame and a damping material is inserted between the support point of the strings and the frame, vibrations of the strings are converted into electric signals by a pickup and sound is emitted from a speaker or the like. In the connection circuit between the key and the speaker, etc., a plurality of low-pass filters are connected in parallel to the low-order harmonics of the fundamental frequency of each key and have resonance points between 2000 Hz and 10000 Hz. A filter circuit for an electric musical instrument, characterized by intervening a bandpass filter.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4171378U JPS599273Y2 (en) | 1978-04-01 | 1978-04-01 | Filter circuit in electric musical instruments |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4171378U JPS599273Y2 (en) | 1978-04-01 | 1978-04-01 | Filter circuit in electric musical instruments |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54146220U JPS54146220U (en) | 1979-10-11 |
JPS599273Y2 true JPS599273Y2 (en) | 1984-03-23 |
Family
ID=28912820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4171378U Expired JPS599273Y2 (en) | 1978-04-01 | 1978-04-01 | Filter circuit in electric musical instruments |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS599273Y2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6226799Y2 (en) * | 1980-02-05 | 1987-07-09 |
-
1978
- 1978-04-01 JP JP4171378U patent/JPS599273Y2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS54146220U (en) | 1979-10-11 |
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