公开(公告)号：US5689079A

公开(公告)日：1997-11-18

申请号：US452304

申请日：1995-05-26

申请人： Taichi Kosugi

发明人： Taichi Kosugi

IPC分类号： G10H7/02 ,  G10H7/08 ,  G10H7/00

CPC分类号： G10H7/08 ,  G10H2250/621

摘要： In a musical tone generator 6 having a waveform memory 8, and an interpolatory calculation circuit 21 for performing an interpolatory calculation on the basis of the plurality of sample values, there are provided a second waveform memory in which the sample values necessary for the interpolatory calculation at the beginning of tone generating are stored, and a transfer circuit for reading out the sample values from the second waveform memory at the beginning of tone generating, and writing them into the interpolation means.

摘要翻译： 在具有波形存储器8的乐音发生器6和基于多个采样值进行内插计算的内插计算电路21中，提供了第二波形存储器，其中内插计算所需的采样值 存储乐音产生开始时的传送电路，以及在乐音产生开始时从第二波形存储器读取样本值的传送电路，并将它们写入插值装置。

公开(公告)号：US5412155A

公开(公告)日：1995-05-02

申请号：US143349

申请日：1993-10-26

申请人： Taichi Kosugi

发明人： Taichi Kosugi

IPC分类号： G10H1/057

CPC分类号： G10H1/0575

摘要： An envelope generator for an electronic musical instrument, in which a current value of the envelope approaching asymptotically to a target level, using a subtracter means for subtracting from data representing the target level in a floating point representation, data representing the difference between the target level and the current value in a floating point representation with deeming these data as fixed point data each having a decimal point between an exponent part and a fractional part, and a comparator for comparing the output of the subtracter means with a predetermined constant, and for judging that an envelope phase transfer condition is met if the output of the subtracter is greater than the constant. The envelope generator can achieve a phase transfer control function substantially similar to prior art envelope generators by a small amount of hardware.

摘要翻译： 一种用于电子乐器的包络发生器，其中使用减法器装置将信封的当前值接近渐近到目标电平的装置，用于从表示浮点表示中的目标电平的数据中减去表示目标电平之间的差的数据 以及将这些数据作为在指数部分和小数部分之间具有小数点的固定点数据的浮点表示的当前值，以及比较器，用于将减法器装置的输出与预定常数进行比较，并用于判断 如果减法器的输出大于常数，则满足包络相位转移条件。 信封发生器可以通过少量硬件实现与现有技术的包络发生器基本相似的相位传递控制功能。

公开(公告)号：US5817964A

公开(公告)日：1998-10-06

申请号：US838676

申请日：1997-04-09

申请人： Taichi Kosugi

发明人： Taichi Kosugi

IPC分类号： G10H7/02 ,  G10H7/08 ,  G06F7/38 ,  G10H7/12

CPC分类号： G10H7/08 ,  G10H7/02 ,  G10H2250/621

摘要： Waveform memory (12) stores a plurality of consecutive waveform sampling value data at a single address. Even when some waveform sampling values are skipped in a process of reproducing a musical tone of a frequency higher than a pitch inherent to a waveform prestored in the memory (12), all of the consecutive sampling values are sequentially read out and stored in temporary storage means (40.about.46) so that the interpolation calculation is accurately performed using the consecutive sampling values.

摘要翻译： 波形存储器（12）在单个地址存储多个连续波形采样值数据。 即使在再现高于预先存储在存储器（12）中的波形固有的音高的音调的过程中跳过某些波形采样值时，所有连续采样值被依次读出并存储在临时存储器中 装置（40差异46），使得使用连续采样值来精确地执行插值计算。

公开(公告)号：US5787023A

公开(公告)日：1998-07-28

申请号：US722972

申请日：1996-09-30

申请人： Taichi Kosugi

发明人： Taichi Kosugi

IPC分类号： G10H1/12 ,  H03H17/00 ,  H03H17/04 ,  G06F17/10 ,  G10H5/00

CPC分类号： G10H1/125 ,  G10H2250/101 ,  G10H2250/121 ,  G10H2250/161

摘要： A digital filter device, for an electronic musical instrument, comprises: filter coefficient generation means for generating a set of filter coefficients in consonance with a designated resonance frequency and Q; and filter operation means for performing an operation for an IIR digital filter, relative to an input tone wave, by using the filter coefficient, which is generated by the filter coefficient generation means, with the filter coefficient generation means including trigonometric function output means, for outputting a trigonometric function value that is consonant with the resonance frequency, and filter coefficient calculation means, for calculating a plurality of filter coefficients based on the Q and the trigonometric function value that is generated by the trigonometric function output means, and with the filter coefficient calculation means having segment approximation means for performing, within a range of x.gtoreq.0, segment approximation of a function f(x)=x/(1+x), or f(x)=1/(1+x), and for outputting the filter coefficients.

摘要翻译： 一种用于电子乐器的数字滤波器装置，包括：滤波器系数产生装置，用于根据指定的共振频率和Q产生一组滤波器系数; 以及滤波器操作装置，用于通过使用由滤波器系数产生装置产生的滤波器系数与包括三角函数输出装置的滤波器系数产生装置相对于输入音调波来执行IIR数字滤波器的操作，用于 输出与谐振频率相符的三角函数值，以及滤波器系数计算装置，用于基于由三角函数输出装置产生的Q和三角函数值来计算多个滤波器系数，并且利用滤波器​​系数 计算装置具有用于在x> = 0的范围内执行函数f（x）= x /（1 + x）或f（x）= 1 /（1 + x））的段近似的段近似装置， 并且用于输出滤波器系数。

公开(公告)号：US5376753A

公开(公告)日：1994-12-27

申请号：US44371

申请日：1993-04-06

申请人： Taichi Kosugi ,  Yutaka Washiyama

发明人： Taichi Kosugi ,  Yutaka Washiyama

IPC分类号： G10H1/053 ,  G10H1/18

CPC分类号： G10H1/053 ,  Y10S84/07

摘要： A key touch detector, for an electronic musical instrument, that detects key touch states, comprises: a first switch to be closed at a first key displacement position disposed along the line of travel of a depressed key; a second switch to be closed at a second key displacement position disposed along the line of travel of the depressed key; a key depression detector for detecting the closure of the first switch and the closure of the second switch; a touch data computer for computing touch data for the depressed key during a period that begins following the closure of the first switch and ends with the closure of the second switch; and delay circuitry for deferring initiation of touch data computation by the touch data computer until a predetermined time has elapsed following the closure of the first switch.

摘要翻译： 一种用于检测键触摸状态的电子乐器的按键触摸检测器，包括：沿着按下的键的行进线布置的第一键位移位置处关闭的第一开关; 第二开关，其沿着沿着所述凹陷键的行进线设置的第二键位移位置关闭; 用于检测第一开关的闭合和第二开关闭合的按键抑制检测器; 触摸数据计算机，用于在开始于所述第一开关的闭合开始并且随着所述第二开关的闭合而结束的期间中计算所述按下的键的触摸数据; 以及用于延迟由触摸数据计算机启动触摸数据计算的延迟电路，直到在第一开关闭合之后经过预定时间。

公开(公告)号：US5932826A

公开(公告)日：1999-08-03

申请号：US84420

申请日：1998-05-27

申请人： Taichi Kosugi

发明人： Taichi Kosugi

IPC分类号： G10H1/02 ,  G10H7/00 ,  H03G3/00

CPC分类号： G10H1/02 ,  G10H7/002 ,  G10H7/008

摘要： An electronic musical instrument has an effect adder circuit for adding sound effect which is controlled by coefficients for filtering operations and amplitude control. The instrument also has a smoothing circuit for smoothly changing a coefficient to a target value by interpolating between the coefficient current value and the coefficient target value to be updated. Smoothing is implemented by repeatedly adding or subtracting a given value to or from the coefficient current value until it reaches the coefficient target value. The precision of the smoothing coefficient depends on the word length of the coefficient current value so that the word length of the coefficient target value can be smaller than that of the coefficient current value. The effect adder circuit and smoothing circuit are independently provided to operate in parallel.

摘要翻译： 电子乐器具有效果加法器电路，用于增加由用于滤波操作和幅度控制的系数控制的声音效果。 仪器还具有平滑电路，用于通过内插系数电流值和要更新的系数目标值来平滑地将系数改变为目标值。 通过反复向系数电流值加上或减去给定值直到达到系数目标值来实现平滑化。 平滑系数的精度取决于系数电流值的字长，使得系数目标值的字长可以小于系数电流值的字长。 独立地提供效果加法器电路和平滑电路以并行操作。

公开(公告)号：US5708227A

公开(公告)日：1998-01-13

申请号：US747994

申请日：1996-11-12

申请人： Taichi Kosugi

发明人： Taichi Kosugi

IPC分类号： G10H1/18 ,  G10H1/053 ,  H03M11/20 ,  H03K17/94 ,  H03M11/00

CPC分类号： G10H1/181 ,  H03M11/20

摘要： In an electronic musical instrument which generates musical tone signals based on playing information input from a key switch circuit 10, a key scan circuit 11 includes a decode circuit 22 to which the current status information and the previous status information read out from a scan data memory 21 are input, and if status information which cannot be processed is input, the decode circuit 22 converts it to status information which can be processed, and if there is no empty space in an output data buffer 24, the decode circuit 22 detects no status change. Such construction allows malfunction to be prevented with a simple construction.

摘要翻译： 在基于从钥匙开关电路10输入的播放信息产生乐音信号的电子乐器中，键扫描电路11包括解码电路22，从扫描数据存储器读出当前状态信息和先前状态信息 21，如果输入了不能处理的状态信息，则解码电路22将其转换为可处理的状态信息，如果输出数据缓冲器24中没有空格，则解码电路22检测不到状态 更改。 这种结构允许以简单的结构来防止故障。

公开(公告)号：US5313014A

公开(公告)日：1994-05-17

申请号：US60247

申请日：1993-05-11

申请人： Taichi Kosugi ,  Takashi Suzuki

发明人： Taichi Kosugi ,  Takashi Suzuki

IPC分类号： G10H1/00 ,  G10H1/46 ,  H04S7/00 ,  G10H1/02 ,  G10H7/00

CPC分类号： G10H1/0091 ,  G10H2210/295 ,  Y10S84/01 ,  Y10S84/27

摘要： An electronic musical instrument incorporates at least two tone signal outputs and controls sound image localization of musical tones in accordance with localization data by changing the levels of at least first and second tone signals provided, respectively, to the tone signal outputs. The instrument includes a tone signal generator for generating a generated tone signal and an output control data production circuit receiving the localization data and providing tone signal volume data and a selection signal. A tone signal output level control receives the generated tone signal and provides the first and second tone signals to the tone signal output. The tone signal output level control has a multiplier for altering the generated tone signal responsive to said volume data to provide one of the first and second tone signals. The tone signal output level control provides a signal corresponding to the generated tone signal unaltered by any multiplication as the other of the first and second tone signals. The tone signal output level control has a pair of selectors responsive to the selection signal for providing one of the first and second tone signals to one of the tone signal outputs and for providing the other of the first and second tone signals to the other of the tone signal outputs, thereby to control sound image localization of the musical sounds of the electronic musical instrument.

摘要翻译： 电子乐器通过将分别提供的至少第一和第二音调信号的电平分别改变为音调信号输出，并入至少两个音调信号输出并根据定位数据来控制乐音的声像定位。 仪器包括用于产生产生的音调信号的音调信号发生器和接收定位数据并提供音调信号音量数据和选择信号的输出控制数据产生电路。 音调信号输出电平控制接收所生成的音调信号，并将第一和第二乐音信号提供给乐音信号输出。 音调信号输出电平控制具有乘法器，用于响应于所述音量数据改变产生的音调信号，以提供第一和第二音调信号之一。 音调信号输出电平控制通过任何乘法提供与所生成的音调信号相对应的信号作为第一和第二音调信号中的另一个。 音调信号输出电平控制具有响应于选择信号的一对选择器，用于将第一和第二音调信号中的一个提供给音调信号输出中的一个，并将第一和第二音调信号中的另一个提供给另一个 音调信号输出，从而控制电子乐器的音乐声音的声像定位。

公开(公告)号：US5827987A

公开(公告)日：1998-10-27

申请号：US882336

申请日：1997-06-25

申请人： Taichi Kosugi

发明人： Taichi Kosugi

IPC分类号： G10H1/12 ,  G10H7/02 ,  G10H1/08

CPC分类号： G10H1/125 ,  G10H7/02 ,  Y10S84/09

摘要： Digital waveform data stored in a waveform memory is read out in response to the ON/OFF operations of key switches such as a keyboard of an electronic musical instrument. The waveform data is passed through a low-pass filter, then subjected to amplitude envelope processing such as attack, decay, release, and the like. The processed waveform data is D/A-converted to output it as a tone signal. A look-up table that stores resonant frequency data and resonance sharpness data (quality factor) of a filter in correspondence with the touch (operation strength or key-ON velocity) of the switch operation at, e.g., the keyboard is used. The resonant frequency and resonance sharpness data are read out from the table in correspondence with the touch data of the keyboard operation to control filter characteristics such as a cutoff frequency, roll-off or slope, and the like, by coefficient data to the filter.

摘要翻译： 响应于诸如电子乐器的键盘的键开关的ON / OFF操作，读出存储在波形存储器中的数字波形数据。 波形数据通过低通滤波器，然后进行振幅包络处理，例如攻击，衰减，释放等。 经处理后的波形数据进行D / A转换，将其作为音调信号输出。 使用与例如键盘上的开关操作的触摸（操作强度或按键速度）相对应地存储滤波器的共振频率数据和谐振锐度数据（品质因数）的查找表。 根据键盘操作的触摸数据，从表中读出共振频率和共振锐度数据，以通过系数数据控制滤波器特性，例如截止频率，滚降或斜率等。

公开(公告)号：US5410099A

公开(公告)日：1995-04-25

申请号：US150269

申请日：1993-11-10

申请人： Taichi Kosugi

发明人： Taichi Kosugi

IPC分类号： G10H1/18 ,  G01H1/18

CPC分类号： G10H1/186

摘要： A channel assigning system which effects an assignment of a channel other than a predetermined number channels which are preferentially assigned to any part of a piece of music, to a part thereof. To thus ensure an efficient use of the channels. Further, the predetermined number of channels to be assigned to any part of the piece of music can be ensured by assigning channels, other than the channels to be secured to newly performed musical tones.

摘要翻译： 将其优先分配给音乐的任何部分的预定数量频道以外的频道的分配的频道分配系统的一部分。 以确保有效利用频道。 此外，可以通过将除了要被保护的频道之外的频道分配给新执行的音乐音调，来确保要分配给音乐片段的任何部分的预定数量的频道。