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公开(公告)号：US4442745A
公开(公告)日：1984-04-17
申请号：US144286
申请日：1980-04-28
申请人： Glenn Gross , Douglas R. Moore
发明人： Glenn Gross , Douglas R. Moore
CPC分类号： G10H7/02
摘要： This is an electronic organ which economically simulates long duration aperiodic musical waveforms, such as the clash of cymbals. It employs the digital waveform generation technique, in which successive instructions are read out of a memory to determine the amplitude of the waveform at successive sample points. To save memory capacity, the memory addresses are rescanned; and to avoid audible discontinuities the scan direction recirculates numerically back and forth across the address field. Despite the bidirectionality of the scan, monotonic decreases in amplitude and in higher harmonic content are achieved. The monotonic decrease in amplitude is accomplished by impressing an exponentially declining envelope upon the digitally generated amplitudes. The monotonic decrease in higher harmonic content is accomplished by preventing the rescan from returning to a memory region of greater harmonic content after it has once entered a region of lesser harmonic content.
摘要翻译： 这是一个经济上模拟长时间不平衡的音乐波形的电子琴，如钹的冲突。 它采用数字波形生成技术，其中从存储器读出连续指令以确定连续采样点处波形的幅度。 为了节省内存容量，重新扫描内存地址; 并且为了避免可听见的不连续性，扫描方向在地址字段上来回地进行数字循环。 尽管扫描的双向性，实现了幅度和谐波含量的单调降低。 振幅的单调下降是通过在数字产生的振幅上施加指数衰减的包络来实现的。 高次谐波含量的单调降低是通过在一旦进入较少谐波含量的区域之后防止重新扫描返回到具有较高谐波含量的存储区域来实现的。
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公开(公告)号：US4228713A
公开(公告)日：1980-10-21
申请号：US921195
申请日：1978-07-03
申请人： Glenn Gross
发明人： Glenn Gross
摘要： In order to tune the frequency characteristics of a filter or oscillator as an exponential function of the position of a note on a musical scale, a pulse stream with an exponentially scaled duty cycle is used to gate an on-off switch which controls an electronic tuning signal for the first or second stage of the filter or oscillator. The pulse stream source can be a pulse code generator responsive to a priority note generator, or it can be an oscillator-driven one-shot with an exponentially scaled power supply governing the charging rate of a reactive component which determines the one-shot cycle time. There are also pitch offset and pitch modulation features in the circuit, the latter being usable in a constant deviation or a constant interval mode.
摘要翻译： 为了调整滤波器或振荡器的频率特性作为音阶上的音符的位置的指数函数，使用具有指数级缩放的占空比的脉冲流来对控制电子调谐的开 - 关开关 信号用于滤波器或振荡器的第一或第二级。 脉冲流源可以是响应于优先音符发生器的脉冲编码发生器，或者它可以是以控制无功分量的充电速率的指数级缩放电源的单次振荡器驱动，其确定单次周期时间 。 电路中还有音调偏移和音调调制特性，后者可用于恒定偏差或恒定间隔模式。
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公开(公告)号：US4287805A
公开(公告)日：1981-09-08
申请号：US144287
申请日：1980-04-28
申请人： Glenn Gross
发明人： Glenn Gross
摘要： An envelope is imposed on a sequence of binary waveform samples representing a musical waveform signal by repetitively summing selected ones of a group of scaled representations of each of the waveform samples of the form A/2.sup.m, A/2.sup.m+1 . . . A/2.sup.m+p, where A represents the magnitude of the waveform sample, p is a predetermined integer, and m is an integer changing by a factor of unity each time a predetermined number of the groups have been developed. The sum of each group of scaled representations differs from the sum of the preceding group by the factor A/2.sup.m+p whereby a staircase signal is produced amplitude modulating the musical waveform signal, the step size of the staircase signal charging each time said predetermined number of groups have been developed.
摘要翻译： 通过对形式为A / 2m，A / 2m + 1的每个波形样本的一组缩放表示中的选定的一个进行重复求和，对包含表示音乐波形信号的二进制波形样本序列施加包络。 。 。 A / 2m + p，其中A表示波形样本的幅度，p是预定的整数，m是每当已经开发了预定数量的组时，以整数因子改变的整数。 每组缩放表示的和不同于前一组的和乘以因子A / 2m + p，由此产生阶梯信号来振幅调制音乐波形信号，每次所述预定数量的阶梯信号的步长 的团体已经开发。
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公开(公告)号：US4186642A
公开(公告)日：1980-02-05
申请号：US835695
申请日：1977-09-22
申请人： Glenn Gross
发明人： Glenn Gross
摘要： A time-shared electronic musical instrument is provided with programmable wave-form generating and tone coloring circuits in order to maintain the musical characteristics regardless of pitch. The circuits comprise programmable keyers and wave-shapers, programmable envelope generators, programmable filters, and a programmable voicing selection circuit, in all of which certain characteristics of the output signal are tailored to the frequency of the musical tone.
摘要翻译： 时分共享的电子乐器具有可编程波形发生和色调电路，以便保持音乐特性而不考虑音调。 这些电路包括可编程键控器和波形整形器，可编程包络发生器，可编程滤波器和可编程语音选择电路，其中所有这些输出信号的某些特性被调整到音调的频率。
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