公开(公告)号：US5206446A

公开(公告)日：1993-04-27

申请号：US465039

申请日：1990-01-16

Applicant: Naoaki Matsumoto ,  Hitoshi Ando ,  Jun Yoshino ,  Hitoshi Kato

Inventor： Naoaki Matsumoto ,  Hitoshi Ando ,  Jun Yoshino ,  Hitoshi Kato

IPC: G10H1/00 ,  G10H1/18

CPC classification number: G10H1/00 ,  G10H1/18 ,  G10H2210/201 ,  G10H2210/295 ,  G10H2240/311

Abstract: An electronic musical instrument has a tone generation mode selecting switch capable of selecting a tone generation mode associated with an arbitrary one of a keyboard instrument play mode, a stringed instrument play mode and a wind instrument play mode, and a CPU for controlling the tone generation mode for a tone generator in accordance with the selection. This electronic musical instrument serving as a so-called tone generator module, can be driven by a MIDI signal supplied to a MIDI circuit from an external unit.

公开(公告)号：US5036541A

公开(公告)日：1991-07-30

申请号：US161344

申请日：1988-02-19

Applicant: Mitsumi Kato

Inventor： Mitsumi Kato

IPC: G10H1/12

CPC classification number: G10H1/125 ,  G10H2210/201 ,  G10H2210/251 ,  G10H2250/061

Abstract: A modulation effect device is implemented by utilizing a fact that a phase or frequency of an output signal from a digital filter can be varied by varying a filter-coefficient according to a lapse of time. A musical tone signal inputted into the digital filter is phase-or frequency-modulated in accordance with the variation of the filter coefficient, thereby imparting such modulation effect as vibrato, chorus or ensemble (symphonic chorus) to the musical tone signal.

Abstract translation: 通过利用来自数字滤波器的输出信号的相位或频率可以通过根据时间的流逝改变滤波器系数而改变的事实来实现调制效应器件。 输入到数字滤波器的乐音信号根据滤波器系数的变化进行相位或频率调制，从而赋予音调信号等颤音，合唱或合奏（交响音）的调制效果。

公开(公告)号：US4283984A

公开(公告)日：1981-08-18

申请号：US134250

申请日：1980-03-26

Applicant: Alfred H. Faulkner

Inventor： Alfred H. Faulkner

IPC: G10H1/24 ,  G10H7/00 ,  G10H1/02

CPC classification number: G10H7/002 ,  G10H1/24 ,  G10H2210/201

Abstract: A microcomputer based synthesizer having a digital keyboard, digital envelope generators, voltage controlled amplifiers and filters, and numerous potentiometer type presets is disclosed. The presets are scanned by the microcomputer, converted to digital form, stored for recall on demand in a non-volatile memory, converted to exponential form by use of a look-up table when required, and output to clamp-and-hold circuits associated with each voltage controlled circuit. Each preset sample and hold operation is followed by a scan of the keyboard to minimize the impact of the capture system on the keyboard scanning rate.

Abstract translation: 公开了一种具有数字键盘，数字包络发生器，压控放大器和滤波器以及许多电位计型号预设的基于微机的合成器。 预设由微型计算机扫描，转换为数字形式，存储为需要时在非易失性存储器中进行调用，在需要时通过使用查找表转换为指数形式，并输出到相关的钳位和保持电路 每个电压控制电路。 每个预设的采样和保持操作之后是键盘的扫描，以最小化捕获系统对键盘扫描速率的影响。

公开(公告)号：US4018125A

公开(公告)日：1977-04-19

申请号：US624496

申请日：1975-10-21

Applicant: Tetsuo Nishimoto

Inventor： Tetsuo Nishimoto

IPC: G10H1/053 ,  G10H1/055 ,  G10H1/18 ,  G10H1/02 ,  G10H5/02

CPC classification number: G10H1/185 ,  G10H1/055 ,  G10H2210/201

Abstract: This invention provides an electronic musical instrument capable of producing plural musical tones simultaneously and also capable of controlling the pitch, tone color and volume of the musical tones in response to a player's finger touch on a key.Transducers capable of electrically detecting the finger touch, i.e. factors including pressure and speed of depression and displacement of the key, are provided for respective keys. Analog outputs of these transducers are sampled and multiplexed in time sharing by each of channels of the number equal to a maximum number of musical tones to be produced simultaneously, and each of the multiplexed signals is held in a corresponding one of condensers provided in the respective channels. The pitch, tone color and volume are controlled in accordance with the magnitudes of voltages held in these condensers. Suitable discharging circuits are connected to these holding condensers. There are also provided means for variably controlling discharging characteristics of the discharging circuits in response to the magnitudes of the voltages held in the condensers and for varying the discharging characteristics stepwisely upon release of the key or at a desired time point thereafter.

Abstract translation: 本发明提供一种电子乐器，能够同时产生多种乐音，并且还能够响应于玩家在钥匙上的手指触摸而控制音调的音调，音色和音量。

公开(公告)号：US3978421A

公开(公告)日：1976-08-31

申请号：US527754

申请日：1974-11-27

Applicant: Thomas A. Walker

Inventor： Thomas A. Walker

IPC: G10H1/043 ,  G10H1/16 ,  G10K15/12 ,  H03G5/10 ,  H03F3/68

CPC classification number: H03G5/10 ,  G10H1/043 ,  G10H1/16 ,  G10K15/12 ,  G10H2210/201 ,  G10H2210/281

Abstract: An electrical musical instrument amplifier is disclosed in which a signal which has been provided by an instrument to a second one of two different preamplifiers for amplification therein is passed to one of the inputs of a summing amplifier together with the output of the first preamplifier, the output of the summing amplifier being coupled through a tube driven power amplifier to a loudspeaker system. The amplified signal from the second preamplifier is applied to a second input of the summing amplifier via a circuit arranged as a voltage divider and having a variable resistance provided by a field effect transistor driven by an oscillator. The modulation provided by the field effect transistor and associated oscillator can be adjusted to provide total phase reversal as well as amplitude modulation when combined with the signal at the output of the second preamplifier, to provide a tremolo or vibrato effect. Improved reverberation control is provided by a control common to the volume controls of both a delayed reverberation signal from the second preamplifier and the combined signal which results when the instrument signal from the second preamplifier is combined with the delayed reverberation signal. The power amplifier can be operated in a distortion mode to achieve desirable harmonics without overloading the voice coils in an attached speaker system through use of a power supply which applies reduced voltages to the power amplifier whenever the gain of the power amplifier is adjusted to a high setting while at the same time regulating the voltage applied to the first and second preamplifiers to keep such voltage constant.