- Sound files and other useful things that go with Ladefoged's Course in Phonetics textbook: http://hctv.humnet.ucla.edu/departments/linguistics/VowelsandConsonants/course/contents.html.
- Peter Ladefoged has another textbook with files online for it, too: http://hctv.humnet.ucla.edu/departments/linguistics/VowelsandConsonants/vowels/contents.html.
- The main page for the web version of Sounds of the World's Languages. Go here to hear native speakers of many, many languages producing all sorts of interesting distinctions. Try the maps page to just explore.
- The Praat web page: http://www.praat.org. Download and install Praat here, or join the Praat help listserv.
- Speech in many, many dialects of English (as well as many foreign accents), much of it phonetically transcribed, and all of it available to listen to: http://classweb.gmu.edu/accent/.
- Movies of the vocal tract and vocal cords in action: http://www.phon.ox.ac.uk/~jcoleman/phonation.htm.
- Another vocal cords in action movie: http://www.humnet.ucla.edu/humnet/linguistics/faciliti/demos/vocalfolds/vocalfolds.htm
- Amazing x-ray movies of speech: http://psyc.queensu.ca/~munhallk/05_database.htm.
- Fun for learning what vocal tract positions correspond to what sounds: http://www.chass.utoronto.ca/~danhall/phonetics/sammy.html.
- University of Iowa has a great site that shows you animations of English and Spanish speech sounds, a video of a speaker's face producing the sounds, the IPA symbol, and along with all of this plays the sound. Good for IPA, articulations, and audiovisual speech.http://www.uiowa.edu/~acadtech/phonetics/
- Movies of pharyngeal consonants and of the vocal cords: http://web.uvic.ca/ling/research/phonetics/index.htm. This page has the movies to go with several papers by John Esling (I'm having problems with some of these movies, but they're great.).
- Here's a nice one on why vowel formants are harder to distinguish at high fundamental frequencies: http://www.phys.unsw.edu.au/~jw/soprane.html.
- McGurk effect demonstration: http://www.media.uio.no/personer/arntm/McGurk_english.html.
- Dani Byrd is a professor at University of Southern California, and her web page has lots of phonetics links: http://www-rcf.usc.edu/~dbyrd/linklist.html.
- Some archived Linguist List issues with lots of phonetics links (some of them included above), just in case you feel like going exploring: http://linguistlist.org/issues/11/11-1812.html, http://linguistlist.org/issues/11/11-1869.html, and http://linguistlist.org/issues/11/11-1964.html.
- Here's another page with a list of phonetics (and phonology) links. http://dmoz.org/Science/Social_Sciences/Linguistics/Phonetics_and_Phonology/
- HTK toolkit for developing an ASR system, and another source for it.
- A bunch of freely downloadable programs relating to various aspects of ASR
- How to use IBM ViaVoice with Java.
- Libraries to help you develop various speech applications:
- A list of a whole bunch of tools, programs, etc. for ASR and HMMs.
- Early synthesis: the Pattern Playback.
- More early synthesis: the Vocoder.
- Articulatory synthesis: Haskins Labs.
- Dennis Klatt's history of speech synthesis sound clips.
- A nice list of synthesis links (not all continue to work though) by Sami Lemmety.
- A list of articulatory synthesis links.
- Audiovisual synthesis (synthesized talking faces), from Sweden.
- Baldi audiovisual synthesis (audiovisual speech synthesis, with multiple languages and special effects). A Baldi toolkit is also available here, if you want to do audiovisual synthesis for your paper.
- More synthesis links, most with demos.
- Really nice page of comparative demonstrations of synthesis in many languages, and they're not links to other people's pages, so they all (?) work.
- HL Syn, a particularly good parametric synthesis program. Samples are at the bottom of the page.
- AT&T concatenative synthesis.
- OGI concatenative synthesis.
- Say... parametric synthesis.
- ATR synthesis demos (many languages, special effects, both their older CHATR system and recent NATR system)
- SpeakNSpell demo (LPC resynthesis)
- Pictures and explanations of Wolfgang von Kempelen's 1791 articulatory synthesis machine
- Many synthesis examples collected by Alan Black, with a talk explaining them (no link problems)