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公开(公告)号：US4217802A
公开(公告)日：1980-08-19
申请号：US918576
申请日：1978-06-23
Applicant: Christian J. Deforeit
Inventor： Christian J. Deforeit
CPC classification number: G10H7/105
Abstract: A polyphonic digital synthesizer which will generate a plurality of periodic signals in real time with independent control of amplitudes. A set of digital memories are at least equal in number to the periodic signals to be produced, the address of each memory determining the frequency of a signal and the content of said memory determining at least the amplitude of said signal. Digital to analog conversion means produce positive or negative analog voltage or current steps whose amplitude is proportional to a data item read in a memory and in response to control signals. These reading and transfer of the data from the memories to the conversion means and conversion control signals are provided in accordance with the transitions of pulsed signals whose repetition frequencies are distributed over a predetermined musical range. Complex output signals can be obtained by writing data in the memories according to an additive synthesis method.
Abstract translation: 一种复音数字合成器，可以独立控制幅度实时生成多个周期信号。 一组数字存储器的数量至少等于要产生的周期信号，确定信号频率的每个存储器的地址以及所述存储器的内容至少确定所述信号的幅度。 数字到模拟转换装置产生正或负模拟电压或电流步长，其幅度与存储器中读取的数据项成比例，并响应于控制信号。 根据其重复频率分布在预定音乐范围上的脉冲信号的转变，提供从存储器到转换装置和转换控制信号的数据的读取和传送。 可以通过根据加法合成方法将数据写入存储器来获得复数输出信号。
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公开(公告)号：US4500317A
公开(公告)日：1985-02-19
申请号：US501531
申请日：1983-06-06
Applicant: Christian J. Deforeit
Inventor： Christian J. Deforeit
Abstract: An "orchestra effect" is produced in an electronic musical instrument by mixing a signal at the commanded frequency with a second signal which is displaced in frequency from the commanded signal, the second signal also periodically varying in frequency. The difference in frequencies between the commanded signal and the signal which is mixed therewith is preferably less than one-half the total variation in frequency of the latter signal.
Abstract translation: 在电子乐器中通过以指令频率混合信号与从指令信号中频移的第二信号，频率周期性变化的第二信号，在电子乐器中产生“乐团效果”。 指令信号和与其混合的信号之间的频率差优选地小于后一信号的频率总变化的一半。
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3.发明授权Method for digitally controlling the envelope curve in a polyphonic musical synthesizer and circuitry to implement the method 失效用于数字控制复音音乐合成器中的包络曲线的方法和实现该方法的电路
公开(公告)号：US4422363A
公开(公告)日：1983-12-27
申请号：US276685
申请日：1981-06-23
Applicant: Christian J. Deforeit
Inventor： Christian J. Deforeit
CPC classification number: G10H1/0575
Abstract: Envelope curves for a large number of individual sounds to be digitally synthesized are generated by storing sample envelope shapes. The duration of the stored curves is varied by exercising control over the sampling of the stored envelopes. The smooth transition from one envelope curve to another is accomplished by sampling the new curve at a fast rate until substantially matching values of the previous and new curve are found and then proceeding with the sampling of the new curve at the desired rate.
Abstract translation: 通过存储样本包络形状来生成用于数字合成的大量单独声音的包络曲线。 通过对存储的信封的采样进行控制来改变存储的曲线的持续时间。 从一个包络曲线到另一个包络曲线的平滑过渡是通过以快速的速率采样新曲线来实现的，直到找到先前和新曲线的基本匹配值，然后以所需速率对新曲线进行采样。
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公开(公告)号：US5905221A
公开(公告)日：1999-05-18
申请号：US786283
申请日：1997-01-22
Applicant: Christian J. Deforeit
Inventor： Christian J. Deforeit
Abstract: The present invention discloses a digital processing device with smooth-clipping function and a digital musical tone synthesizing device using it. When one or a plurality of digital values are input to the digital processing device and a smooth-clipping mode is activated, an overflow during processing of the digital values is avoided as the internal resulting value of the device is scaled down before it is output. The scaling down of the internal resulting value is continuously increased in dependence on the increase of the value of the internal resulting value, such that an overflow is avoided. For example, if the digital processing device is performing a summation of two digital operands in a digital musical tone forming device, the time behavior of the resulting tone signal slope is smooth and thus the sound dynamics are improved and sound distortions are avoided during sound reproduction.
Abstract translation: 本发明公开了一种具有平滑削波功能的数字处理装置和使用它的数字乐音合成装置。 当将一个或多个数字值输入到数字处理装置并且平滑削波模式被激活时，在数字值的处理期间，由于在输出装置的内部结果值被缩小之前，所以避免了溢出。 内部结果值的缩小依赖于内部结果值的值的增加而不断增加，从而避免溢出。 例如，如果数字处理装置在数字乐音形成装置中执行两个数字操作数的求和，则所得到的音调信号斜率的时间行为是平滑的，因此改善了声音动力学，并且在声音再现期间避免了声音失真 。
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公开(公告)号：US4402243A
公开(公告)日：1983-09-06
申请号：US235843
申请日：1981-02-19
Applicant: Christian J. Deforeit
Inventor： Christian J. Deforeit
Abstract: A digital synthesizer primarily intended for use in electronic musical instruments which are microprocessor controlled includes a plurality of storage devices which contain numerical data commensurate with the characteristics of an output signal to be produced. Information is read out of these storage devices under the control of command signals having a predetermined repetition frequency. The generation of the command signals is controlled in such a manner as to permit the generation of harmonically related frequencies.
Abstract translation: 主要用于微处理器控制的电子乐器的数字合成器包括多个存储装置，其包含与要产生的输出信号的特性相称的数值数据。 在具有预定重复频率的命令信号的控制下，从这些存储装置中读出信息。 命令信号的产生以允许产生谐波相关频率的方式进行控制。
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Patent Agency Ranking6.发明授权
公开(公告)号：US4384504A
公开(公告)日：1983-05-24
申请号：US273571
申请日：1981-06-15
Applicant: Christian J. Deforeit
Inventor： Christian J. Deforeit
IPC: G10H7/00
CPC classification number: G10H7/00 , G10H2210/255
Abstract: The phase of digitally synthesized audio frequency signals of the same frequency is synchronized prior to conversion of the signals into analog form. The phase synchronization is accomplished, in a musical instrument of the keyboard type, by comparison of the digitally coded signals which are commensurate with all of the simultaneously generated input commands and, when frequency coincidence is detected, employing the phase value of the first of plural commanded signal at the same frequency as the starring phase value for subsequently generated signals at the common frequency.
Abstract translation: 在将信号转换为模拟形式之前，相同频率的数字合成音频信号的相位被同步。 通过比较与所有同时生成的输入命令相称的数字编码信号，在键盘式的乐器中实现相位同步，并且当检测到频率一致时，采用多个第一个的相位值 以相同的频率与在相同频率处的随后生成的信号的主演相位值相同的指令信号。
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公开(公告)号：US4651611A
公开(公告)日：1987-03-24
申请号：US671115
申请日：1984-11-13
Applicant: Christian J. Deforeit
Inventor： Christian J. Deforeit
CPC classification number: G10H1/0558 , Y10S84/07
Abstract: The touch dynamics of the operation of keys of an electronic musical instrument are determined through the use of pressure sensitive transducers associated with the keys, the transducers each including a magnetic field responsive semiconductor device and providing signals which are analyzed to determine their variation in magnitude as a function of time. Additionally, after a pre-selected time period, if a key remains operated and the pressure exerted thereon is varied, the output voltage of the key associated transducer will be further analyzed to determine if the player is calling for the reproduction of a secondary effect.
Abstract translation: 通过使用与按键相关联的压敏传感器来确定电子乐器的键的操作的触摸动态，换能器各自包括磁场响应半导体装置，并提供被分析以确定其幅度变化的信号 时间的功能。 此外，在预选时间段之后，如果键保持操作并且其上施加的压力改变，则将进一步分析密钥相关联的换能器的输出电压，以确定玩家是否呼叫再现次要效果。
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公开(公告)号：US4484180A
公开(公告)日：1984-11-20
申请号：US372309
申请日：1982-04-27
Applicant: Christian J. Deforeit
Inventor： Christian J. Deforeit
Abstract: The identification of the last-actuated of a plurality of parallel connected switches is provided by energizing a light source associated with the last-actuated switch and by providing a coded output signal which identifies the switch. The identification of a closed switch is accomplished through the use of logic circuitry which periodically imposes a potential difference across all of the switch associated light sources. The potential difference is sensed via the closed switch and functions as an initiation signal which causes generation of a coded output signal and maintains energization of the light source.
Abstract translation: 通过激励与最后驱动的开关相关联的光源并通过提供识别开关的编码输出信号来提供多个并联的开关的最后致动的识别。 闭合开关的识别通过使用周期性地施加所有与开关相关联的光源的电位差的逻辑电路来实现。 通过闭合开关来感测电位差，并且起到启动信号的作用，从而产生编码的输出信号并维持光源的通电。
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公开(公告)号：US4279186A
公开(公告)日：1981-07-21
申请号：US92468
申请日：1979-11-08
Applicant: Christian J. Deforeit
Inventor： Christian J. Deforeit
CPC classification number: G10H7/105
Abstract: The invention concerns a polyphonic musical synthesizer using digital techniques. The generation of successive wave form patterns makes use of phase data for addressing a wave form memory, and of amplitude and harmonic or octave row data contained in a set of memory blocks. Control of the synthesizer is effected by externally addressing the memory set in order to write the aforementioned data in it.The development of synthesis operations within the synthesizer is conditioned by a sequential chain of reading of the different memory blocks in terms of signals from a plurality of generators.
Abstract translation: 本发明涉及使用数字技术的复音音乐合成器。 连续波形图案的产生利用了用于寻址波形存储器的相位数据以及包含在一组存储器块中的幅度和谐波或倍频程行数据。 合成器的控制通过外部寻址存储器组来实现，以便将上述数据写入其中。 在合成器内的合成操作的发展由来自多个发生器的信号的不同存储块的读取的顺序链来调节。
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公开(公告)号：US4628790A
公开(公告)日：1986-12-16
申请号：US771971
申请日：1985-09-03
Applicant: Christian J. Deforeit
Inventor： Christian J. Deforeit
Abstract: The realism by which the sound produced by various musical instruments may be electronically simulated is enhanced by the storage of digital data commensurate with scanning values of several periods of a note including the release portion thereof. Command words are also memorized and, in response to the reading of a command word and the state of the input command to the instrument by the player, indicative of whether the note is to be sustained or terminated, the reading of a command word may cause the addressing of the waveform memory to be jumped to the release portion where the read-out will be continued from a scanning value approximately equal to the value read immediately prior to the reading of the command word. The waveform memory may contain a segment of the sustain portion of the note which will be repetitively read so long as the player's input command indicates that the note is to be sustained, the repetition also being in response to memorized command words.
Abstract translation: 可以通过电子模拟各种乐器产生的声音的现实性通过与包括其释放部分的音符的若干周期的扫描值相对应的数字数据的存储来增强。 还记录命令字，并且响应于指示字的读取和玩家对乐器的输入命令的状态，指示音符是持续还是终止，指令字的读取可能导致 波形存储器的寻址将被跳转到释放部分，其中读出将从大约等于在读取命令字之前读取的值的扫描值继续。 波形存储器可以包含将重复读取的音符的维持部分的片段，只要玩家的输入命令指示音符将被持续，重复也将响应于存储的命令字。
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