专利汇可以提供Electronic musical instrument employing waveshape memories专利检索,专利查询,专利分析的服务。并且In an electronic musical instrument, actuation of each key switch produces a key data signal indicative of the identification name of the key switch. A key address code corresponding to this key data signal is stored in a key address code memory. Frequency data corresponding to the fundamental frequencies of musical tones for the respective key switches are stored beforehand in a frequency information memory. The key address code read from the key address code memory is used to read frequency information corresponding to the key address code from the frequency information memory. The frequency information is thereafter counted cumulatively in a counter to produce a waveshape address code successively changing with time. Musical tone waveshape memories are provided for storing waveshapes in time-sampled analog representation. The sampled analog values are successively read out in accordance with the changing waveform address code thereby constructing the waveform. Envelope shapes of the musical tones are stored in time-sampled analog representation in envelope memories. Control signals representing depression and release of a key are produced from the key data signal which is produced by the depression and release of the key. A suitable clock pulse is selected by these control signals to read out the envelope shapes. The read out outputs of the envelope memories are applied to the voltage control terminals of the musical tone waveshape memories to determine the instantaneous amplitude thereby causing the musical tone waveshape memories to produce musical tone waveshapes with desired envelopes. In order to enable a simultaneous reproduction of a plurality of musical tones, the instrument is constructed as a dynamic logic system wherein logical circuits as well as the memories and the counters are used in a time sharing manner.,下面是Electronic musical instrument employing waveshape memories专利的具体信息内容。
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