Q: the sound on my ipad has gone to distorted can hear music but no voices on my movies?

Try a different pair of headphones. If you managed to break the common connection back from the earpieces it would produce a similar effect. If that doesn't improve it you may have a problem with the headphone socket; you should take it to an Apple Store (ring and make an appointment) and ask for advice.

You can start from trying steps provided here: If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker - Apple Support