I've never made a recording, but I have given this a good amount of thought.
Male dwarven names, for instance, always begin with a "hard" sound- K, Z, D, TH like in "The" (not as in "think"), etc. A dwarf named something like Wendall would be the equivalent of a human boy in high school named Sissy Little Bitch. Dwarven is fairly guttural, full of hard sounds. A good Dwarven speaker uses a strong, regular rhythm when he talks. The Dwarven language follows its rules of syntax exactly; there are no irregular verbs or other weird corner cases. The language is also strictly regulated by the dwarven elders, and it is a curious example of a "living dead tongue", where many of its concepts and terms are obsolete. Every century, each dwarven thanedom assembles a council of elders that makes recommendations for new words that should be allowed into the language, then one representative will travel to other thanedoms collecting feedback and, eventually, votes; but the process usually takes decades to approve a new word.
Draconic is a very sibilant tongue, full of "S", "SH", "CH", "SS" (subtly different from "S" and hard for non-native speakers to get right), "Z", "KS", "TS", "PS" and other similar sounds, as well as a number of hisses that have no real human equivalent (although we could probably hack up a recognizable approximation if we spoke the language). It has an extraordinary depth of vocabulary that short-lived races can only begin to learn, including whole tenses that imply vast sweeps of time. Only ancient dragons and their ilk are truly proficient speakers of Draconic. Because it is the tongue of dragons, much of the language involves glorifying the speaker. Tenses conjugate pronouns or nouns rather than verbs, for instance, and it is literally impossible to utter a sentence in Draconic with an unclear subject.
