Electronic musical instrument

摘要

An electronic musical instrument is controlled to receive key operation messages from a keyboard, sequencer or the like so as to control the data in such a manner that the disadvantages of a first-in first-out system and a map system are diminished and the newest data can be obtained rapidly. A reading device sequentially reads musical pitches out from a first memory so that it can be decided whether the values indicated on note-on/off flags in a second memory have the same state as the flags in a third memory. A command is issued to generate and/or truncate (or mute) musical tones based on key-depression (i.e., key state) data for the musical pitches registered in the second memory, if the flags are not identical with each other. On the other hand, the key-depression data are discarded without issuing any command if the flags are the same.