getFrequencyRangeByYulmyeong method
Implementation
List getFrequencyRangeByYulmyeong(Yulmyeong yulmyeong, ScaleStatus scaleStatus) {
List correctRange = [
getFrequencyByYulmyeong(yulmyeong, scaleStatus) - _correctRange,
getFrequencyByYulmyeong(yulmyeong, scaleStatus) + _correctRange
];
return correctRange;
}