reverse power time signature resolve

reversePowerTimeSig.js

export function getTimeSignatureinSemiQuavers(timeSignature: MidiTimeSignatureEvent): TimeSignatureValues {
  const { numerator, denominator } = timeSignature
  const deltaFromSemiQuaver = 4 - denominator
  if (deltaFromSemiQuaver > 0) {
    return Array(deltaFromSemiQuaver).fill(0).reduce((agg) => {
      return {
        numerator: agg.numerator * 2,
        denominator: agg.denominator * 2
      }
    }, { numerator, denominator: 2**denominator })
  } else if (deltaFromSemiQuaver < 0) {
    return Array(Math.abs(deltaFromSemiQuaver)).fill(0).reduce((agg) => {
      return {
        numerator: agg.numerator / 2,
        denominator: agg.denominator / 2
      }
    }, { numerator, denominator: 2**denominator })
  }
}