The girl's voice was animated, but she didn't sound very confident.
"You don't sound entirely confident in the certain success of our plans."
There's still a long way to go so I don't want to sound too confident.
She sounded a little more confident, now she'd given him the name.
It's easy for me to sound confident about the show now.
But his speech, just at first, did not sound all that confident.
Trying to sound confident for the sake of the others.
His voice sounded confident, though he could no longer feel sure of that.
He was doing his best to sound confident and competent.
"I want to be able to sound confident about bringing this one in."