What's the correct pronuncation of these leters: **c** and **d**???
How do spanish spell C when it is before e or i.
4 Answers
When used before an e or i it is like 'see'. You can also look up any word with the letters you want in this dictionary and click on the speaker icon.
In Spain, like 'th' in thin.
Elsewhere, as far as I know, the way that Yesero says.
Also see this thread. 
The letter d can be understood most of the time if pronounced like in English, but it is notably different in Spanish.
There are three different contexts which matter for the pronunciation of 'd' in Spanish. 1) at the beginning of a word:(or before a consonant) this is the one that most sounds like the 'd' of English but is different (the tip of the tongue contacts the hard palate (just behind the alveolar ridge in Spanish) but contacts the alveolar ridge in English). The intervocalic 'd', rather like the 'th' of English in 'rather' but deemphasized (very brief contact with the palate). Final 'd', either simply elided (in some dialects) or very much like the 'th' of English in 'rather' but given full emphasis.
Hi and welcome to the forum. 
Here’s a link to an article in the Reference section on how to pronounce Spanish letters.
