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公开(公告)号：US4033221A
公开(公告)日：1977-07-05
申请号：US602631
申请日：1975-08-11
摘要： This key switch system (1) scans closed (or open) key switches in a matrix to produce corresponding key data, (2) encodes these key data into corresponding key codes, and (3) effectively registers the encoded key codes into time-shared channels of a key code memory.The key switch system may be incorporated in an electronic musical instrument. The system includes a key data generator which produces block data consisting of one pulse per scanning cycle in a time slot representing a block to which a key switch which is ON belongs, and note data consisting of a pulse in a time slot representing the particular key switch which is ON in the block indicated by the block data. A key coder encodes the block data and note data supplied from the data generator into key codes each representing the key name of the depressed key. A channel processor allots the key codes to storage channels of a key code memory having a number of such channels equal to the maximum number of tones to be reproduced simultaneously.
摘要翻译： 该钥匙开关系统（1）扫描矩阵中的关闭（或打开）钥匙开关以产生相应的钥匙数据，（2）将这些钥匙数据编码成对应的钥匙码，（3）有效地将编码的钥匙码注册为时间共享 通道的密钥代码存储器。
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公开(公告)号：US3979996A
公开(公告)日：1976-09-14
申请号：US581186
申请日：1975-05-27
CPC分类号： G10H7/04 , G10H1/02 , G10H2210/211
摘要： In a digital type electronic musical instrument in which basic frequency is cumulatively counted and a musical tone waveshape is read from a memory by the resultant output of the cumulative counting, a desired vibrato effect is produced by digitally frequency-modulating the basic frequency. Vibrato information for effecting the frequency-modulation is produced from a vibrato code obtained by counting a clock pulse and a vibrato depth signal and has contents which change as time elapses. The frequency-modulation is made by multiplying the basic frequency with the vibrato information. The vibrato depth may be controlled for each individual keyboard. Vibrato frequency may be changed by changing the frequency of the clock pulse for each keyboard. According to an embodiment of the invention, the vibrato depth progressively increases from the start of reproduction of the musical tone. The speed of change of the vibrato depth may also be controlled for each individual keyboard.
摘要翻译： 在通过累积计数的合成输出累积计数基本频率并从存储器读取乐音波形的数字式电子乐器中，通过对基本频率进行数字频率调制来产生期望的颤音效果。 用于实现频率调制的振动信息是通过对时钟脉冲和颤音深度信号进行计数而获得的颤音码产生的，并且具有随着时间流逝而变化的内容。 通过将基本频率与颤音信息相乘来进行频率调制。 可以为每个单独的键盘控制颤音深度。 可以通过改变每个键盘的时钟脉冲的频率来改变振动频率。 根据本发明的实施例，颤音深度从音乐的再现开始逐渐增加。 也可以为每个单独的键盘控制颤音深度的变化速度。
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公开(公告)号：US3979989A
公开(公告)日：1976-09-14
申请号：US581184
申请日：1975-05-27
摘要： In a digital type electronic musical instrument in which frequency information corresponding to a depressed key is cumulatively counted and a musical tone waveshape is read from a memory by the resultant output of the cumulative counting, modified frequency information is produced by adding to or subtracting from said frequency information second frequency information represented by a predetermined frequency difference. A tone of a pitch which is slightly different from a normal pitch is generated from this modified frequency information for producing a beat effect between notes in an octave relation. The pitch can be controlled by suitably adjusting the second frequency information. Different beat effects can be produced for respective keyboards by varying the second frequency information by each keyboard. According to an alternative embodiment of the invention, two or more sets of tone reproduction systems are provided and the beat effect is produced by depression of a single key by varying modified frequency information for the respective tone reproduction systems.
摘要翻译： 在通过累积计数的合成输出累积计数对应于按下的键的频率信息和从存储器读取乐音波形的数字式电子乐器中，通过将累加计数的合成输出相加或减去来产生修正频率信息 由预定频率差表示的频率信息第二频率信息。 从用于产生八度关系的音符之间的节奏效果的该修改频率信息产生与正常音调稍微不同的音调的音调。 可以通过适当地调整第二频率信息来控制音调。 通过每个键盘改变第二频率信息可以为各个键盘产生不同的拍子效果。 根据本发明的替代实施例，提供了两组或更多组音调再现系统，并且通过改变各个音调再现系统的修改频率信息来抑制单个键来产生节奏效果。
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