After the first time student hear the sound that you turn on

"Do you need to hear it again?"/ "One more time?"
"How was that?"
"(Did you get) anything at all?"
"Let me have a look at (some of) your answers. Not bad, you've got about 50% right."
"I'll play it one more time (but stopping after each answer/ section)"
"I'll play it a little bit slower" [if you have speed control on the computer or cassette player]
"After you compare your answers, I'll play it one more time"

Jamrut 009 3EN