| 摘要 |
An electronic musical instrument includes a linear voltage divider network including a plurality of equal series resistance elements for generating a first output voltage as a function of the state of a plurality of tone select keys. This first voltage is converted to a second voltage which selectively varies exponentially as a function of the selected tone. The second voltage is compared with a ramp generator output to set and reset a latch which generates an audio frequency signal thereby. The audio frequency signal is coupled to an octave generator controlled by octave select keys for outputting the tone in a selected octave for output as sound via a speaker. Sharp and flat keys are also provided to cause the first voltage to vary in a way which emulates the functioning of a standard keyboard.
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