This episode is a talk given by the meditation master Ajahn Plien and is titled “The Fundamentals of Meditation”. I accessed this free distribution publication via the Buddha Sasasa website. You can find links to the original text in the description below.
Links:

Fundamentals of Meditation by Ajahn Plien
Everyday Dhamma Network
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A Gift Of Dhamma | Ajahn Chah

Narrated translations of meditation masters of the forest tradition of Theravada Buddhism.