To dream of a cassette tape represents issues or situations that are interesting enough to set aside time or resources to exploring. It may reflect making plans to experience something or making a concerted effort to do something. Plans you want to make, hobbies you care about, or anything that you’d have to go out of your way to feel.
To dream of cassette tapes that you don’t want to listen to represents resistance to doing something that is up too much time or work. You may think something is too unpleasant or too much work to bother with.
Example: A man dreamed of finding an old cassette tape. In waking life he discovered his old comic books and decided to sit around for the day looking at them.