What must a caller be notified about before being recorded for on-air playback?

Before a caller is recorded for on-air playback, it is essential that they are informed that their conversation is being recorded and that they must provide their consent. This requirement is rooted in legal and ethical standards regarding privacy and consent. Informing the caller ensures compliance with various regulations that protect individuals' rights, often encapsulated under laws concerning wiretapping and recording conversations, which typically mandate that all parties involved in a call must be aware of and agree to the recording.

This is crucial for maintaining transparency and trust between the broadcaster and the caller. By obtaining permission, the broadcaster respects the caller's autonomy and right to privacy, allowing them to understand fully the nature of the interaction. Without this critical information and subsequent consent, the recording could lead to legal repercussions for the broadcaster.

The other options may address various aspects of a broadcast or the caller's experience but do not capture the legal requirement for consent concerning recording, making them less pertinent in this scenario.