He sounded indifferent to that decision now, and she couldn't understand why.

He sounds quite indifferent, as if he's just following orders.

He made a deliberate attempt to sound indifferent, but there was a hardness in his features that hadn't been present before.

His voice sounded indifferent and bored, but Jaden could tell otherwise.

She didn't like the new tone, for though not blase, it sounded indifferent in spite of the look.

He sounded indifferent, as though intent on some task.

The band sounded happily indifferent to most music around it.

She tried to sound indifferent, but her tone was more of a plea.

He looked and sounded so totally indifferent, as though all questions were hypothetical.

Of course he could afford to sound indifferent, couldn't he?