ðeɪ ɡˌoʊ θɹuː ɐn ɛkstˈɛnsɪv vˈoʊkəl ænd fˈɪzɪkəl wˈɔːɹmˌʌp tə pɹɪpˈɛɹ ðɛɹ bˈɑːdiz, ɐn ˈæktɚz ˈɪnstɹəmənt, fɔːɹ ðɛɹ klˈæs.
They go through an extensive vocal and physical warm-up to prepare their bodies, an actors instrument, for their class.