The actual CVR recording can only be released by the company. It is company property and after the investigation it goes back to the company who usually destroys it. Occasionally, some companies like UAL with Al Haynes and UAL 232 release it because it serves a value to the entire aviation community. The CVR transcript is part of the investigation. It gives insight to the attitude, actions, mentality, etc., of the cockpit. It does serve an invaluable role in the investigation. Often times that's how they piece critical data together.

Extraneous conversation, such as two pilots talking about the hottie in back, will not included into the transcript because the hottie wasn't in the cockpit and had no material relevance. Otherwise, what you say is public information should the worst happen. Years ago I worked on a CVR team and it took months afterward before I felt like I could talk normally in the cockpit again because everything I said replayed for myself as if I was being investigated.

Do your best and be professional.