Function createsVoiceOverlap

createsVoiceOverlap(
    upperPrev: number,
    upperCur: number,
    lowerPrev: number,
    lowerCur: number,
): boolean
Whether two voices overlap: the upper voice descends below where the lower voice just was, or the lower voice rises above where the upper voice just was. Distinct from a simultaneous voice crossing.
Parameters
- upperPrev: number
  Previous pitch of the upper voice.
- upperCur: number
  Current pitch of the upper voice.
- lowerPrev: number
  Previous pitch of the lower voice.
- lowerCur: number
  Current pitch of the lower voice.
Returns boolean
- Defined in theory/counterpoint/index.ts:191