JP4258991B2 - Musical sound generator and musical sound generation processing program - Google Patents

Description

【数２】

【数３】

【数４】

【数５】

【数６】

【数７】

【数８】

【００２３】
そして、各レジスタの優先度の値に基づいて、下記の数式８により総合的なチャンネル優先度の平均値を計算し、レジスタＳＳに格納する（ステップＤ８）。ＳＳに格納した優先度の値は、図６に示したＲＡＭのエリアにおいて、各チャンネル番号（ボイス番号）に対応する音色番号に対して、ベロシティ及びポリプレッシャの値とともに、優先度の値が記憶される。この場合は、音色数は音色０及び音色１の２種類である。
【数８】

【００２４】
図１１はメインフローにおけるステップＡ５のアサイン処理のフローである。まず、アサイン処理変数の初期化を行う。すなわち、現在見つかっている最も低い優先度をセットするレジスタＰＬに２５５（最大値）をセットし、現在調査中のチャンネル番号をセットするレジスタＣＣに０（チャンネル番号０）をセットし、現在までに見つかっている最も低い優先度のチャンネル番号をセットするレジスタＣＬに０をセットする(ステップＥ１)。
【００２５】
次に、現在調査中のチャンネルの優先度をセットするレジスタＰに現在のチャンネルの優先度をセットする(ステップＥ２)。最初は、現在調査中のチャンネル番号ＣＣの値は０である。次に、Ｐの値が０であるか否かを判別する(ステップＥ３)。すなわち、現在調査中のチャンネルの優先度が０で、そのチャンネルが消音状態であるか否かを判別する。この場合には、ＰＬにＰの値すなわち０をセットし、ＣＬにＣＣの値すなわち現在調査中のチャンネル番号をセットする(ステップＥ４)。
【００２６】
ステップＥ３においてＰの値が０でない場合には、Ｐの値がＰＬの値より小さいか否かを判別する(ステップＥ５)。すなわち、現在調査中のチャンネルの優先度が現在見つかっている最も低い優先度よりも低いか否かを判別する。Ｐの値がＰＬの値より小さい場合には、ＰＬにＰの値をセットし、ＣＬにＣＣのチャンネル番号をセットする(ステップＥ６)。すなわち、現在調査中のチャンネルを現在見つかっている最も低い優先度のチャンネル番号として入れ替える。
【００２７】
この入れ替えの後、又はステップＥ５においてＰの値がＰＬの値以上である場合には、ＣＣの値をインクリメントして(ステップＥ７)、次のチャンネル番号を指定する。そして、インクリメントしたＣＣの値が８より小さいか否か、すなわち最大チャンネル番号７以下か否かを判別する(ステップＥ８)。ＣＣの値が８より小さい場合には、次のチャンネル番号が存在するので、ステップＥ２に移行して上記処理を繰り返す。
【００２８】
例えば、図６の例では、ステップＥ２においてＰにチャンネル番号０の音色０、優先度である５０をＰにセットした後、ステップＥ３ではＰの値が０でないのでステップＥ５に進む。ステップＥ５において、Ｐの値５０はＰＬの値２５５よりも小さいのでステップＥ６に進んで、ＰＬに優先度５０をセットし、ＣＬにチャンネル番号０をセットする。次に、ステップＥ７において次のチャンネル番号１がセットされ、ステップＥ２に移行する。
【００２９】
次に、ステップＥ２において、Ｐにチャンネル番号１の音色１、優先度４２がセットされる。そして、ステップＥ３、ステップＥ５に進む。ステップＥ５において、Ｐの値４２はＰＬの値５０より小さいので、見つかっている最も低い優先度のチャンネル番号が入れ替わり、ステップＥ６に進んでＰＬに優先度４２をセットし、ＣＬにチャンネル番号１をセットする。
【００３０】
このように、ステップＥ３においてＰの値が０でない場合には、ステップＥ８においてＣＣの値が８になるまで、すなわちすべてのチャンネルの優先度を検索するまで、ステップＥ２からステップＥ８までのループを繰り返し実行して、すべてのチャンネルの中で最も低い優先度（図６の例では８）のチャンネル（ＣＬのチャンネル番号）を捜す。そして、ＣＬの値を割り当てチャンネル番号として保持する(ステップＥ９)。図６の例ではチャンネル番号５を保持する。ステップＥ３においてＰの値が０で現在調査中のチャンネルが消音状態である場合には、発音イベントを無条件にそのチャンネルに割り当てられるので、ステップＥ４においてそのチャンネル番号をＣＬにセットした後は、ステップＥ９に進んでＣＬの値を割り当てチャンネル番号として保持する。
【００３１】
ステップＥ９において、最も低い優先度の発音イベントのチャンネル番号を保持した後はステップＥ１０に進み、今回発生した発音イベントの優先度を計算してレジスタＳＣに格納する。次に、ＰＬの優先度の値がＳＣの優先度の値よりも小さいか否かを判別する（ステップＥ１１）。ＰＬの優先度がＳＣの優先度よりも小さい場合には、現在指定しているチャンネルに今回発音する発音イベントを割り当てることができる。この場合において、ＰＬが０であるか否か、すなわち優先度が０で消音状態であるか否かを判別する（ステップＥ１２）。
【００３２】
ＰＬが０でない場合には、割り当てチャンネル番号における発音イベントのレベルが０（消音）になっていないので、強制ファーストダンプ処理を行ってその発音イベントを強制的に消音する(ステップＥ１３)。一方、ＰＬが０である場合には、すでにそのチャンネルは消音状態になっているので、強制ファースト処理を行う必要はない。ステップＥ１３の強制ファーストダンプ処理の後、又はステップＥ１２においてＰＬが０（消音状態）である場合には、発音フラグＨＦに１をセットする（ステップＥ１４）。ステップＥ１１において、ＰＬの優先度がＳＣの優先度以上である場合には、今回の発音イベントは発音されない。この場合には、ＨＦに０をセットする（ステップＥ１５）。ＨＦに１又は０をセットした後は、図７のメインフローに戻る。
【００３３】
メインフローにおけるステップＡ６の発音処理においては、入力されたＭＩＤＩデータの発音イベントに対して、ＨＦの値が１である場合にはその発音イベントに対する発音処理を実行し、ＨＦの値が０である場合にはその発音イベントは発音されず無視される。
【００３４】
なお、この実施形態において、チャンネルのすべてが発音状態である場合に新たな発音イベントが発生したときは、その新たな発音イベントの優先度が発音中の発音イベントのうち最も低い優先度より高い場合に、その発音チャンネルの発音イベントを強制的に消音して新たな発音イベントを割り当てるが、その優先度の演算は数式８に示すように、ピッチベンド、ビブラート、ポルタメント、モノプレッシャ、ポリプレッシャ、ベロシティ、及びタッチセンスの７個のファクタをすべて加味して優先度を算出している。
【００３５】
しかしながら、優先度の算出のためには、主にソロ演奏等に使用している発音パートに対するファクタであるピッチベンド、ビブラート、ポルタメントに基づいて優先度を算出し、ソロ演奏等の発音パートの優先度が高くなるような構成にしてもよい。
また、音色に変化に影響を与えるモノプレッシャ、ポリプレッシャ、ベロシティ、及びタッチセンスのファクタに基づいて優先度を算出し、演奏者が意識的に音楽的効果を付加した発音チャンネル（ボイス）の優先度が高くなるような構成でにしてもよい。
すなわち、上記実施形態の構成は、発音パートに重点をおいて優先度を決定する第１の発明と、音色変化に重点をおいて優先度を決定する第２の発明とを含んでいる。
【００３６】
以上のように、上記実施形態の楽音発生装置は、所定数の発音チャンネルによって複数の発音パートを分担する場合に、各発音チャンネルに割り当てられる発音イベントに対して音楽的効果を付加する制御データの種別及び各発音パートに応じて優先度を算出し、発音チャンネルのすべてが発音状態である場合に新たな発音イベントが発生したときは、その新たな発音イベントの優先度が発音中の発音イベントのうち最も低い優先度より高い場合に、その発音チャンネルの発音イベントを強制的に消音して新たな発音イベントを割り当てる。
【００３７】
また、上記実施形態のプログラムは、楽音発生装置のコンピュータによって実行させる楽音発生処理のプログラムであって、
所定数の発音チャンネルによって複数の発音パートを分担する発音手段の各発音チャンネルに割り当てられる発音イベントに対して音楽的効果を付加する制御データの種別及び各発音パートに応じて優先度係数を設定するステップと、所定数の発音チャンネルのすべてが発音状態である場合に新たな発音イベントが発生したときは各発音チャンネルにおいて発音中の発音イベントに対する優先度を優先度係数に基づいて算出するステップと、この算出するステップによって算出された各発音チャンネルの優先度のうち最も低い優先度が新たな発音イベントの優先度より低いか否かを判定するステップと、この判定するステップによって最も低い優先度が新たな発音イベントの優先度より低いと判定された場合に最も低い優先度の発音イベントを強制的に消音させてその発音チャンネルに前記新たな発音イベントを割り当てるステップとを有する構成になっている。
すなわち、このプログラムは、楽音発生装置のコンピュータを楽音発生処理における各処理を実行する複数の手段として機能させる。
【００３８】
したがって、このような構成の楽音発生装置又は楽音発生処理のプログラムによれば、所定数の発音チャンネルのすべてが発音状態である場合に新たな発音イベントが発生したときに、発音中の発音イベントを強制的に消音させて発音チャンネルを確保するアサイン処理を行っても音楽的に不自然な影響を与えることがない。
【００３９】
なお、上記実施形態においては、各発音パートに応じて優先度係数を設定するが、その場合において、メロディパート等のように主旋律の発音パートに対して高い優先度を設定する。
また、上記実施形態においては、音楽的効果を付加する制御データの種別、すなわち、ピッチベンド、ビブラート、ポルタメントに応じて優先度係数を設定するが、その場合において、音楽的効果の付加量が大きいほど高い優先度を設定する。
【００４０】
また、上記実施形態の楽音発生装置は、所定数の発音チャンネルを有する発音手段の各発音チャンネルに発音イベントを割り当てる場合に、各発音チャンネルに割り当てられる発音イベントに対して音色変化を与える制御データの種別に応じて優先度を算出し、発音チャンネルのすべてが発音状態である場合に新たな発音イベントが発生したときは、その新たな発音イベントの優先度が発音中の発音イベントのうち最も低い優先度より高い場合に、その発音チャンネルの発音イベントを強制的に消音して新たな発音イベントを割り当てる。
【００４１】
また、上記実施形態のプログラムは、楽音発生装置のコンピュータによって実行させる楽音発生処理のプログラムであって、
所定数の発音チャンネルを有する発音手段の各発音チャンネルに割り当てられる発音イベントに対して音色変化を与える制御データの種別に応じて優先度係数を設定するステップと、所定数の発音チャンネルのすべてが発音状態である場合に新たに発音すべき発音イベントが発生したときは各発音チャンネルにおいて発音中の発音イベントに対する優先度を優先度係数に基づいて算出するステップと、この算出するステップによって算出された各発音チャンネルの優先度のうち最も低い優先度が新たな発音イベントの優先度より低いか否かを判定するステップと、この判定するステップによって最も低い優先度が新たな発音イベントの優先度より低いと判定された場合に最も低い優先度の発音イベントを強制的に消音させてその発音チャンネルに新たな発音イベントを割り当てるステップとを有する構成になっている。
すなわち、このプログラムも、楽音発生装置のコンピュータを楽音発生処理における各処理を実行する複数の手段として機能させる。
【００４２】
したがって、このような構成の楽音発生装置又は楽音発生処理のプログラムによれば、所定数の発音チャンネルのすべてが発音状態である場合に新たな発音イベントが発生したときに、発音中の発音イベントを強制的に消音させて発音チャンネルを確保するアサイン処理を行っても音楽的に不自然な影響を与えることがない。
【００４３】
なお、上記実施形態においては、音色変化を与える制御データの種別に応じて優先度係数を設定するが、この場合において、制御データによって与えられる音色変化量が大きいほど高い優先度を設定する。
【００４４】
さらに、上記実施形態によれば、発音パートに重点をおいて優先度を決定する第１の発明と音色変化に重点をおいて優先度を決定する第２の発明とを合成して、すなわち、数式８に示す演算のように、発音パート及び音色変化に重点をおいて優先度を決定する第３の発明を構成することも明らかである。
この場合には、所定数の発音チャンネルによって複数の発音パートを分担する発音手段の各発音チャンネルに割り当てられる発音イベントに対して音色変化及び各発音パートに応じて優先度係数を設定する。
【００４５】
なお、上記実施形態においては、ＭＩＤＩデータの入力に対して優先度に基づくアサイン処理を行う場合について説明したが、図８のフローにおいて鍵盤入力が設定された場合にも、鍵盤から入力される演奏データに含まれる制御データ、各発音チャンネルに対して指定された発音パートに応じて、鍵盤入力に対して優先度に基づくアサイン処理を行う構成にしてもよい。
【００４６】
【発明の効果】
本発明によれば、所定数の発音チャンネルのすべてが発音状態である場合に新たな発音イベントが発生したときに、発音中の発音イベントを強制的に消音させて発音チャンネルを確保するアサイン処理を行っても音楽的に不自然な影響を与えることがない。
【図面の簡単な説明】
【図１】本発明による楽音発生装置の実施形態の構成を示すブロック図。
【図２】図１におけるＲＡＭのエリアのデータ構成を示す図。
【図３】図２における音色パラメータのデータ構成例を示す図。
【図４】図２における機器トータルパラメータのデータ構成例を示す図。
【図５】図２における発音パートパラメータのデータ構成例を示す図。
【図６】図２におけるチャンネル優先度のデータ構成例を示す図。
【図７】図１のＣＰＵの動作を示すメインフローチャート。
【図８】図４におけるスイッチ処理のフローチャート。
【図９】図４におけるＭＩＤＩ処理のフローチャート。
【図１０】図９における優先度再計算のフローチャート。
【図１１】図４におけるアサイン処理のフローチャート。
【符号の説明】
１ ＣＰＵ
３ ＲＯＭ
４ ＲＡＭ
５ 鍵盤
６ スイッチ部
７ ＭＩＤＩインターフェース
８ 音源ＬＳＩ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a musical sound generating apparatus and a musical sound generating process program.
[0002]
[Prior art]
2. Description of the Related Art Musical sound generators such as electronic musical instruments in recent years are configured to provide rich musical sounds by simultaneously generating a plurality of sounding events. For this purpose, the sound generation means such as a sound source has a predetermined number of sound generation channels (also referred to as “voices”), and performs processing for assigning sound generation events to each sound generation channel by an assigner or the like. When a sounding event occurs due to MIDI data input, performance, etc., if all of the specified number of sounding channels are sounding, one sounding event is dumped first, and the sound is forcibly muted. In general, assignment processing for securing a channel (also referred to as “truncation processing”), that is, assignment processing giving priority to later arrival is performed.
In this assignment process, it is necessary to select a sound generation channel to be muted under some condition. Conventionally, the following three selection methods have been adopted. The first method is to select the most advanced tone signal envelope stage. The second method selects the musical sound signal having the lowest envelope level. The third method selects the received MIDI data or performance, for example, the oldest key pressed.
[0003]
[Problems to be solved by the invention]
However, in the above conventional technique, since the method of selecting the sound channel to be muted does not consider musical elements, there is a problem that the generated sound may be unnaturally affected depending on the result of forced muting. there were.
For example, if the main melody part, such as the melody part, and the accompaniment part, such as the rhythm part and chord part, are simultaneously sounding with the same sound source means, it is not possible to mute the main melody part by the conventional selection method. Musically unfavorable.
Or, for example, if the performer intentionally changes the timbre by adding aftertouch on the keyboard, muting the pronunciation event ignores the intention of the performer. Is not preferable.
An object of the present invention is to prevent an unnatural influence on music even if an assigning process for forcibly muting a sounding event during sounding to secure a sounding channel is performed.
[0004]
[Means for Solving the Problems]
  The musical sound generating apparatus according to claim 1 is a sounding event assigned to each sounding channel of sounding means (corresponding to the sound source LSI 8 of FIG. 1 in the embodiment) that shares a plurality of sounding parts by a predetermined number of sounding channels. AgainstTouch sense dataAnd a setting means (in the embodiment, corresponding to the CPU 1 in FIG. 1) for setting a priority coefficient according to each sounding part, and when a predetermined number of sounding channels are in a sounding state, a new sounding event is generated. Calculation means (corresponding to the CPU 1 in FIG. 1 in the embodiment) for calculating the priority for the sounding event being sounded and the new sounding event in each sounding channel when they occur, based on the priority coefficient, Determination means for determining whether or not the lowest priority among the sound channel priorities calculated by the means is lower than the priority of the new sound event (corresponding to the CPU 1 in FIG. 1 in the embodiment). If the determination means determines that the lowest priority is lower than the priority of the new pronunciation event, the lowest priority pronunciation event Assigning means for forcibly silenced by assigning a new sound event to its sound channel (in embodiments corresponds to the CPU1 in Figure 1) has a configuration in which a.
[0005]
  Claim2The musical tone generation processing program described in the above is a musical tone generation processing program executed by a computer of the musical tone generation apparatus (corresponding to the CPU 1 in FIG. 1 in the embodiment). For sound events that are assigned to each sound channel of sound means that share sound partsTouch sense dataAnd a step of setting a priority coefficient according to each sound part, and when a new sound event occurs when all of the predetermined number of sound channels are in sound, priority is given to the sound event that is sounding in each sound channel. Calculating a degree based on a priority coefficient, and determining whether or not the lowest priority among the priority of each sound channel calculated by the step of calculating is lower than the priority of a new sound event If the lowest priority is determined to be lower than the priority of the new sounding event by this determination step, the sounding event having the lowest priority is forcibly silenced and the new sounding event is assigned to the sounding channel. And a step of assigning.
[0006]
  According to the first or second aspect of the present invention, when a plurality of sound parts are shared by a predetermined number of sound channels, the sound events assigned to the sound channels are assigned.Touch sense dataThe priority is calculated according to each sound part, and when a new sounding event occurs when all sounding channels are in sounding status, the priority of the new sounding event is When the priority is higher than the lowest priority, the sounding event of the sounding channel is forcibly muted and a new sounding event is assigned.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments according to the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of an embodiment of a musical sound generator according to the present invention. In the figure, a CPU 1 is connected to a ROM 3, a RAM 4, a keyboard 5, a switch unit 6, and a MIDI I / F (interface) 7 via a system bus 2. The CPU 1 constitutes a computer that executes a musical sound generation processing program stored in the ROM 3 on the RAM 4 as a work area.
[0011]
The keyboard 5 inputs musical sound data, which is a sounding event, according to the performance. The switch unit 6 includes a switch for setting a tone color, a switch for setting a performance mode such as keyboard performance and automatic performance, a switch for adding musical effects such as pitch bend and vibrato, and the like. The MIDI I / F 7 exchanges MIDI data including sound generation events and the like between an external MIDI device and the electronic musical instrument. The CPU 1 is also connected to the tone generator LSI 8 and outputs the pitch data and control data of the sound generation event from the keyboard 5 and the MIDI I / F 7 to the tone generator LSI 8.
[0012]
The tone generator LSI 8 includes eight tone generation channels (hereinafter simply referred to as channels) including CH0 to CH7, and can simultaneously generate musical sounds corresponding to eight tone generation events. In addition, the tone generator LSI 8 includes a synthesizer that synthesizes tone signals from eight channels into, for example, a two-channel stereo tone signal. The synthesized musical tone signal output from the tone generator LSI 8 is converted into an analog signal by the A / D 9 and subjected to filter processing and amplification processing in the output circuit 10 to be generated from an external speaker.
[0013]
FIG. 2 shows a part of the RAM 4 area, which includes areas for timbre parameters, device total parameters, sound production part parameters, and channel priority. Although not shown in the figure, the RAM 4 is provided with various registers, and temporarily stores various data in the musical tone generation process executed by the CPU 1.
In the timbre parameter area, as shown in FIG. 3, priority weights, that is, priority coefficient data are stored for each timbre corresponding to variable names corresponding to the types of factors (sound effect addition elements). The Even with the same factor, the priority weight differs for each timbre.
[0014]
The types of factors include pitch bend that continuously raises and lowers the pitch, vibrato that shakes the sound, portamento that smoothly shifts from the current pitch to the next pitch, the tone of each MIDI channel by the keyboard aftertouch operation, There are a mono pressure that changes volume, a poly pressure that changes tone color and volume for each sound generation channel (voice), a velocity that is sound intensity, and a touch sense that represents velocity sensitivity.
[0015]
In the device total parameter area, as shown in FIG. 4, priority weight data corresponding to variable names corresponding to the types of factors in the function of the device, that is, the musical tone generating device of FIG. 1, is stored.
In the sound part parameter area, as shown in FIG. 5, priority weight data corresponding to the variable name corresponding to the type of factor is stored for each sound part designated for each MIDI channel. . A tone color is specified for each part.
[0016]
In the channel priority area, as shown in FIG. 6, priority data is stored corresponding to the timbre number assigned to the channel number. As shown in the figure, in this case, two parts, part 0 and part 1, are assigned to 8 channels, 4 channels each. The priority is calculated by an arithmetic process described later.
[0017]
Next, a tone generation process in the tone generator of FIG. 1 will be described.
FIG. 1 is a main flowchart showing the operation of the musical tone generation process of the CPU 1. First, after predetermined initialization (step A1), switch processing (step A2), keyboard processing (step A3), MIDI processing (step A4), assignment processing (step A5), sound generation processing (step A6), and other processing (Step A7) is repeatedly executed.
Note that the assignment process in step A5 and the sound generation process in step A6 are continuous cooperative actions by the CPU 1 and the tone generator LSI 8, but are distinguished as two processes for convenience of explanation.
[0018]
FIG. 8 is a flow of the switch process in step A2 in FIG. The mode switch in the switch section is searched (step B1), and it is determined whether or not the current mode is the automatic performance mode (step B2). In the case of the automatic performance mode, input setting of MIDI data input via the MIDI I / F 7 is performed (step B3). If it is not the automatic performance mode but the manual performance mode, the performance data input by operating the keyboard 5 is set (step B4). After the setting of step B3 or B4, another switch search process is performed (step B5), and the process returns to the main flow of FIG.
[0019]
FIG. 9 is a flow of the MIDI processing in step A4 in the main flow. It is determined whether or not a MIDI event has been received (step C1). If it is not received, this flow is terminated. If it has been received, it is determined whether or not the MIDI channel matches the part number (step C2). . If they do not match, this flow ends. If they match, the matched part number of the MIDI data is set in the register p (step C3).
[0020]
Next, it is determined whether or not control data for adding sound effects is included in the received MIDI event (sound generation event). If included, the received control data is assigned to the part number [p]. Store in the corresponding RAM area.
That is, it is determined whether or not pitch bend has been received (step C4). The received value is stored in PB [p] (step C5). It is determined whether or not vibrato has been received (step C6). The received value is stored in VB [p] (step C7).
It is determined whether or not a mono pressure has been received (step C8). The received value is stored in MP [p] (step C9). It is determined whether or not portamento has been received (step C10). The received value is stored in PM [p] (step C11). It is determined whether or not a touch sense change has been received (step C12). The received value is stored in TS [p] (step C13). Then, priority recalculation is executed based on the value of the stored control data (step C14).
[0021]
FIG. 10 is a flowchart of this priority recalculation. The pitch bend priority value is calculated by the following formula 1 and stored in the register PB (step D1). The vibrato priority value is calculated by Equation 2 and stored in the register VB (step D2). The portamento priority value is calculated by Equation 3 and stored in the register PM (step D3). The priority value of the mono pressure is calculated by Equation 4 and stored in the register MP (step D4). Based on the received mono pressure value, the priority value of the poly pressure is calculated by Equation 5 and stored in the register PP (step D5). The velocity priority value is calculated by Equation 6 and stored in the register VL (step D6). The touch sense priority value is calculated by Equation 7 and stored in the register TS (step D7).
[0022]
[Expression 1]

[Expression 2]

[Equation 3]

[Expression 4]

[Equation 5]

[Formula 6]

[Expression 7]

[Equation 8]

[0023]
Based on the priority value of each register, the average value of the overall channel priority is calculated by the following formula 8 and stored in the register SS (step D8). The priority value stored in the SS is stored in the RAM area shown in FIG. 6 together with the velocity and the pressure value for the tone number corresponding to each channel number (voice number). Is done. In this case, there are two types of timbres: timbre 0 and timbre 1.
[Equation 8]

[0024]
FIG. 11 is a flowchart of the assignment process in step A5 in the main flow. First, the assignment process variable is initialized. That is, 255 (maximum value) is set in the register PL that sets the lowest priority currently found, and 0 (channel number 0) is set in the register CC that sets the channel number currently being investigated. 0 is set in the register CL for setting the lowest priority channel number found (step E1).
[0025]
Next, the priority of the current channel is set in the register P for setting the priority of the channel currently being investigated (step E2). Initially, the value of the channel number CC currently being investigated is zero. Next, it is determined whether or not the value of P is 0 (step E3). That is, it is determined whether or not the priority of the channel currently being investigated is 0 and the channel is muted. In this case, the value of P, that is, 0 is set in PL, and the value of CC, that is, the channel number currently being investigated is set in CL (step E4).
[0026]
If the value of P is not 0 in step E3, it is determined whether or not the value of P is smaller than the value of PL (step E5). That is, it is determined whether or not the priority of the channel currently being investigated is lower than the lowest priority currently found. If the value of P is smaller than the value of PL, the value of P is set in PL, and the channel number of CC is set in CL (step E6). That is, the channel under investigation is replaced with the lowest priority channel number currently found.
[0027]
After this replacement, or when the value of P is greater than or equal to the value of PL in step E5, the value of CC is incremented (step E7) and the next channel number is designated. Then, it is determined whether or not the incremented CC value is smaller than 8, that is, whether or not the maximum channel number is 7 or less (step E8). If the value of CC is smaller than 8, the next channel number exists, so the process moves to step E2 and the above process is repeated.
[0028]
For example, in the example of FIG. 6, after setting the timbre 0 of channel number 0 and the priority 50 to P in P in Step E2, the value of P is not 0 in Step E3, so the process proceeds to Step E5. In step E5, since the value 50 of P is smaller than the value 255 of PL, the process proceeds to step E6, where priority 50 is set in PL and channel number 0 is set in CL. Next, in step E7, the next channel number 1 is set, and the process proceeds to step E2.
[0029]
Next, in step E2, tone 1 of channel number 1 and priority 42 are set in P. Then, the process proceeds to Step E3 and Step E5. In step E5, since the value 42 of P is smaller than the value 50 of PL, the channel number of the lowest priority that has been found is switched, and the process proceeds to step E6 where priority 42 is set in PL and channel number 1 is set in CL. set.
[0030]
Thus, if the value of P is not 0 in step E3, the loop from step E2 to step E8 is repeated until the value of CC becomes 8 in step E8, that is, until the priority of all channels is searched. Repeatedly, the channel (CL channel number) having the lowest priority (8 in the example of FIG. 6) among all channels is searched. Then, the value of CL is held as an assigned channel number (step E9). In the example of FIG. 6, channel number 5 is held. In step E3, if the value of P is 0 and the currently investigated channel is muted, a sounding event can be unconditionally assigned to that channel. Therefore, after setting the channel number to CL in step E4, Proceeding to step E9, the value of CL is held as the assigned channel number.
[0031]
In step E9, after holding the channel number of the sound event with the lowest priority, the process proceeds to step E10, where the priority of the sound event that has occurred this time is calculated and stored in the register SC. Next, it is determined whether or not the PL priority value is smaller than the SC priority value (step E11). If the PL priority is lower than the SC priority, a sounding event to be sounded this time can be assigned to the currently designated channel. In this case, it is determined whether or not PL is 0, that is, whether or not the priority is 0 and the sound is muted (step E12).
[0032]
If PL is not 0, the sounding event level in the assigned channel number is not 0 (silence), so the forced fast dump process is performed to forcibly silence the sounding event (step E13). On the other hand, when PL is 0, the channel has already been muted, and there is no need to perform forced first processing. After the forced fast dump process at step E13 or when PL is 0 (silenced state) at step E12, 1 is set to the sound generation flag HF (step E14). In step E11, if the PL priority is higher than the SC priority, the current sounding event is not sounded. In this case, 0 is set in HF (step E15). After setting HF to 1 or 0, the process returns to the main flow of FIG.
[0033]
In the sound generation process of step A6 in the main flow, if the HF value is 1 for the sound generation event of the input MIDI data, the sound generation process is executed for the sound generation event, and the value of HF is 0. In some cases, the pronunciation event is not pronounced and ignored.
[0034]
In this embodiment, when a new sounding event occurs when all channels are in a sounding state, the priority of the new sounding event is higher than the lowest priority among sounding sounding events. In addition, the sound event of the sound channel is forcibly muted and a new sound event is assigned, and the priority calculation is performed as shown in Equation 8: pitch bend, vibrato, portamento, mono pressure, poly pressure, velocity, In addition, the priority is calculated in consideration of all seven factors of touch sense.
[0035]
However, in order to calculate the priority, the priority is calculated based on the pitch bend, vibrato, and portamento, which are factors for the sound part used mainly for solo performances, and the priority of the sound part for solo performances, etc. It may be configured such that the height becomes high.
Also, priority is calculated based on the factors of mono pressure, poly pressure, velocity, and touch sense that affect the timbre, and the priority of the sound channel (voice) to which the player has added a musical effect consciously. You may make it the structure which becomes high.
That is, the configuration of the above embodiment includes the first invention that determines priority with emphasis on the sound production part and the second invention that determines priority with emphasis on timbre change.
[0036]
As described above, the musical sound generating apparatus according to the above embodiment has control data for adding a musical effect to a sounding event assigned to each sounding channel when a plurality of sounding parts are shared by a predetermined number of sounding channels. Priority is calculated according to the type and each sound part, and when a new sound event occurs when all sound channels are in sound, the priority of the new sound event If the priority is higher than the lowest priority, the sounding event of the sounding channel is forcibly muted and a new sounding event is assigned.
[0037]
Further, the program of the above embodiment is a program for generating a musical sound to be executed by a computer of the musical sound generating device,
A priority coefficient is set in accordance with the type of control data that adds a musical effect to the sound event assigned to each sound channel of the sound generating means that shares a plurality of sound parts by a predetermined number of sound channels and each sound part Calculating a priority for a sounding event that is sounding in each sounding channel based on a priority coefficient when a new sounding event occurs when all of the predetermined number of sounding channels are in a sounding state; A step of determining whether or not the lowest priority among the sound channel priorities calculated in the calculating step is lower than the priority of the new sound generation event, and the lowest priority is newly determined by the determination step. The lowest priority pronunciation event when it is determined that the priority is lower than the priority Forcibly Mute has a structure and a step of assigning the new sound event to its sound channel.
That is, this program causes the computer of the musical tone generator to function as a plurality of means for executing each process in the musical tone generation process.
[0038]
Therefore, according to the musical sound generating device or musical sound generating process program having such a configuration, when a new sounding event occurs when all of the predetermined number of sounding channels are in a sounding state, the sounding event being sounded is detected. Even if the assignment process is performed to forcibly mute the sound and secure the sound channel, there is no unnatural influence on the music.
[0039]
In the above embodiment, the priority coefficient is set according to each sound part. In this case, a high priority is set for the main melody sound part such as a melody part.
In the above embodiment, the priority coefficient is set according to the type of control data to which a musical effect is added, that is, pitch bend, vibrato, and portamento. In this case, the larger the added amount of the musical effect is, Set a high priority.
[0040]
In addition, the musical sound generating apparatus of the above embodiment has control data that gives a timbre change to a sounding event assigned to each sounding channel when a sounding event is assigned to each sounding channel of a sounding means having a predetermined number of sounding channels. Priority is calculated according to the type, and when a new pronunciation event occurs when all of the pronunciation channels are in a sounding state, the new sounding event has the lowest priority among the sounding events that are currently sounding If it is higher, the sounding event of the sounding channel is forcibly muted and a new sounding event is assigned.
[0041]
Further, the program of the above embodiment is a program for generating a musical sound to be executed by a computer of the musical sound generating device,
A step of setting a priority coefficient according to the type of control data that gives a timbre change to a sounding event assigned to each sounding channel of a sounding means having a predetermined number of sounding channels, and all of the predetermined number of sounding channels are sounded When a new sounding event to be sounded occurs in the state, a step of calculating the priority for the sounding event being sounded in each sounding channel based on the priority coefficient, and each step calculated by this calculating step A step of determining whether the lowest priority among the sound channel priorities is lower than the priority of the new sounding event, and if the lowest priority is lower than the priority of the new sounding event by this determining step If judged, the lowest priority pronunciation event is forcibly muted and its pronunciation channel And the operating portions and assigning a new sound event.
That is, this program also causes the computer of the musical tone generator to function as a plurality of means for executing each process in the musical tone generation process.
[0042]
Therefore, according to the musical sound generating device or musical sound generating process program having such a configuration, when a new sounding event occurs when all of the predetermined number of sounding channels are in a sounding state, the sounding event being sounded is detected. Even if the assignment process is performed to forcibly mute the sound and secure the sound channel, there is no unnatural influence on the music.
[0043]
In the above embodiment, the priority coefficient is set in accordance with the type of control data that gives the timbre change. In this case, the higher the timbre change amount given by the control data, the higher the priority is set.
[0044]
Further, according to the above embodiment, the first invention for determining priority with emphasis on the pronunciation part and the second invention for determining priority with emphasis on timbre change are combined, that is, It is also obvious that the third invention for determining the priority with emphasis on the sound generation part and the timbre change as in the calculation shown in Expression 8 is also provided.
In this case, a priority coefficient is set in accordance with the timbre change and each sounding part for the sounding event assigned to each sounding channel of the sounding means sharing a plurality of sounding parts by a predetermined number of sounding channels.
[0045]
In the above embodiment, the case where assignment processing based on priority is performed on the input of MIDI data has been described. However, even when keyboard input is set in the flow of FIG. 8, performance input from the keyboard is performed. Depending on the control data included in the data and the sounding part designated for each sounding channel, assignment processing based on priority may be performed for keyboard input.
[0046]
【The invention's effect】
According to the present invention, when a new sounding event occurs when all of the predetermined number of sounding channels are in a sounding state, the assigning process for forcibly muting the sounding event being sounded and securing the sounding channel is performed. There is no musically unnatural influence even if it goes.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an embodiment of a musical sound generator according to the present invention.
2 is a diagram showing a data configuration of an area of a RAM in FIG.
3 is a diagram showing a data configuration example of timbre parameters in FIG. 2; FIG.
4 is a diagram showing a data configuration example of device total parameters in FIG. 2. FIG.
5 is a diagram showing a data configuration example of a sound part parameter in FIG. 2. FIG.
6 is a diagram showing a data configuration example of channel priority in FIG. 2. FIG.
FIG. 7 is a main flowchart showing the operation of the CPU in FIG. 1;
FIG. 8 is a flowchart of switch processing in FIG. 4;
FIG. 9 is a flowchart of the MIDI process in FIG. 4;
10 is a flowchart of priority recalculation in FIG. 9;
FIG. 11 is a flowchart of assignment processing in FIG. 4;
[Explanation of symbols]
1 CPU
3 ROM
4 RAM
5 keyboard
6 Switch part
7 MIDI interface
8 Sound source LSI

Claims (2)

A setting means for setting a touch coefficient and a priority coefficient according to each sounding part for sounding events assigned to each sounding channel of the sounding means sharing a plurality of sounding parts by a predetermined number of sounding channels;
When a new sounding event occurs when all of the predetermined number of sounding channels are in a sounding state, the sounding event being sounded in each sounding channel and the priority for the new sounding event are based on the priority coefficient. Computing means for calculating;
Determination means for determining whether or not the lowest priority among the priorities of the sound generation channels calculated by the calculation means is lower than the priority of the new sound generation event;
When the determination means determines that the lowest priority is lower than the priority of the new sounding event, the sounding event having the lowest priority is forcibly silenced and the new sounding event is assigned to the sounding channel. Assigning means for assigning
Musical sound generator with A musical sound generation processing program executed by a computer of the musical sound generator,
A step of setting a priority coefficient according to touch sense data and each sound part for a sound event assigned to each sound channel of sound means that shares a plurality of sound parts by a predetermined number of sound channels;
When a new sounding event occurs when all of the predetermined number of sounding channels are in a sounding state, calculating a priority for a sounding event that is sounding in each sounding channel based on the priority coefficient;
Determining whether the lowest priority among the priorities of each sound channel calculated by the calculating step is lower than the priority of the new sound event;
If it is determined in the determining step that the lowest priority is lower than the priority of the new sounding event, the sounding event having the lowest priority is forcibly silenced and the new sounding channel is transmitted to the sounding channel. Assigning an event,
A program for generating musical sounds, comprising:

Images