| 摘要 |
A key assigner system for an electronic musical instrument having an assignment memory assignment channel number N equal to or less than the number of signal sources of a musical tone signal generator for storing information such as a key number and/or an ON/OFF state of a key, a closed-keys sequence memory having the same number N of words as the channel number for storing channel name, and a processor for writing or reading ON/OFF states of key switches according to information from scanning ON/OFF states of key switches. There is at least one key OFF channel in the assignment memory, apparatus for detecting the least recently closed key channel of key OFF channels according to information of the closed-keys sequence memory when a newly closed key is detected to assign the channel as the channel of the newly closed key, and apparatus for detecting the channel of the least recently closed key of key ON channels according to information of the closed-keys sequence memory when N channels are all in a key ON state closure of a newly-depressed key key is detected to assign the channel as the channel of the newly closed key, thereby processing at a high speed with a simplified arrangement, so that a player feels no inconvenience during a performance.
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