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Build your own language from MIT News Office on SoundCloud.
The following external links may be useful for further information:
Phonetics
Phonetic Inventories in Some ConLangs
Eric Singer Discussing ConLangs (YouTube)
J.R.R. Tolkien Reading in Quenya (YouTube)
Reading from the Kalevala in Finnish (YouTube)
The Klingon Language Institute
Marc Okrand on Creating Klingon (YouTube)