If you hear a high pitched squealing sound coming from you DCC player when using a recordable tape, it is not the player but the tape. It is called the stick slip effect, caused by a dirty felt pad.
This hardly ever happens with prerecorded titles, just recordables.
During the squealing, you will not be able to make a decent recording. You will first have to clean the felt pad.
Here is a video about the problem and solution: