Please do note that the crew cannot hear the PAO. They can hear everything else transmitted on channel 212, which is the KSC Launch Team primary comm frequency.
So anytime a launch team member talks on 212, the crew can hear it.
So here's a basic generic T-9 minutes and counting transcript:
CGLS: Countdown clock will resume on my mark. 5, 4, 3, 2, 1, mark. T-9 minutes and counting.
CGLS: GLS autosequence has been initiated.
OTC: PLT, OTC connect essential buses to the fuel cells per your checklist.
PLT: OTC, PLT that's in work.
PLT: OTC, PLT essential buses connected to the fuel cells.
OTC: OTC copy.
CGLS: GLS is GO for Orbiter Access Arm retract.
NTD: NTD, JPRS start APU flight recorders.
JRPS: APU flight recorders are running.
OTC: PLT, OTC perform APU prestart.
PLT: OTC, PLT that's in work.
PLT: OTC, PLT APU prestart complete, we have three gray talkbacks.
OTC: OTC copy.
CGLS: GLS is GO for orbiter APU start.
OTC: PLT, OTC, perform APU start.
PLT: OTC, PLT that's in work.
OTC: CDR, OTC reconfigure heaters.
CDR: OTC, CDR that's in work.
PLT: OTC, PLT APU start complete, we have three in HYD green and heater reconfig is complete.
OTC: OTC copy.
CGLS: GLS is GO for Purge Sequence 4.
CGLS: GLS is GO for ET LO2 pressurization.
OTC: PLT, OTC, clear Caution&Warning memory, verify no unexpected errors.
PLT: OTC, PLT that's in work.
PLT: OTC, PLT Caution&Warning memory has been cleared, no unexpected errors.
OTC: Discovery, OTC close and lock visors and initiate O2 flow.
CDR: Discovery copies.
CGLS: GLS is GO for ET LH2 pressurization.
NTD: 1 minute, 30 seconds.
NTD: 1 minute.
CGLS: GLS is GO for autosequence start.
CGLS: 20 seconds.
CGLS: GLS is GO for main engine start.