When using an authentic audio or video it is important to use only ‘native speakers'.

When using an authentic audio or video it is important to use only ‘native speakers'. Do you agree or disagree? Give reasons.

Depending on the level of our students, I would use native speakers with beginners, as they need a basis on which to start building their knowledge and reference of language sounds. Moving to the upper levels they can gradually be exposed to nonnative varieties to get to recognise the language through different accents and come to know the cultural varieties that connect to these differences.