Sound control device and control method thereof, electronic musical instrument, and program

Provided is a sound control device that acquires performance information including pitch information indicating a pitch and volume information indicating a volume detected as a continuous amount, determines a note start and a note end on the basis of a result of comparison between the volume in the performance information and a threshold value and a change in the pitch in the performance information, and that controls the start and the end of a note on the basis of the determined note start and the determined note end. When it is determined that the volume has changed in the predetermined manner, the note is determined to be finished and the note is determined to be started at the timing when the volume has changed in the predetermined manner regardless of the result of comparison between the volume and the threshold value. 提供一种音控制装置，其取得演奏信息，该演奏信息包含表示音高的音高信息、和表示作为连续量而检测出的音量的音量信息，基于演奏信息中的音量与阈值的对比结果、和演奏信息中的音高的变化，判定音符开始及音符结束，在判定为音量以规定的方式发生了变化的情况下，无论音量与阈值的对比结果如何，在音量以规定的方式发生了变化的定时，都判定为音符结束，并且判定为音符开始。