Pali Pronunciation

I am a new at Pali, and am working my way through Warder's book. But I
have only gotten through the first three lessons. I also have the CD
that accompanies Warder's text. In one of the passages for reading,
words such as "citta" are pronounced with a hard "c", as in
English "cat." I had understood that "c" in Pali was always
pronounced "ch". Could anyone please clarify this pronunciation issue.

Thank you.
Dave