In C has no set duration; performances can last as little as fifteen minutes or as long as several hours, although Riley indicates "performances normally average between 45 minutes and an hour and a half."
In C har ikke en bestemt varighed; optræden kan vare så lidt som femten minutter eller så længe flere timer, selv om Riley angiver "optræden har normalt et gennemsnit mellem 45 minutter og halvanden time."