Another speech analysis system that has been used for both pedagogical and research purposes is the Micro Speech Lab (MSL) developed by the Centre for Speech Technology Research in cooperation with the Department of Linguistics at the University of Victoria, B.C., Canada, reported on in Esling (1992). Various components of the program allow for speech editing (MSLEDIT), manipulatory exercises (MSLSORT), pitch display, and other acoustics, for example, spectrographic information (MSLPITCH and MSLSPECT).
For the Macintosh computer, any sound digitizer (e.g., MacRecorder, Digidesign's Audiomedia board, or the internal digitizer on most PowerMacintosh computers sold today) can be used in conjunction with a program called Signalyze (cf. Keller, 1988), for example, to produce and store intonation curves of native speakers and learners, as well as to display them next to each other (cf. Chun, 1991). A program called SpeechLab Authoring Tool, based on Signalyze, has been developed to automatically display first the native speaker's utterance and then the student's attempt (cf. Fidelman & Keller, 1994). The purported benefits are that students would get immediate visual and audio feedback of the otherwise elusive dimension of pitch. However, the tool is limited in its pitch-tracking ability and, as with the earlier software for PCs and Windows-based computers, in not providing pedagogical analysis or feedback.
For Apple II computers, the Video Voice Speech Training System, which uses a graphic display of the human voice, is available from Micro Video Corporation, 210 Collingwood, Suite 100, P.O. Box 7357, Ann Arbor, MI 48107; (313) 996-0262 (URL: www.videovoice.com).
For UNIX environments, try the Speech Filing System developed at University College London (contact Mark Huckvale: SFS@phonetics.ucl.ac.uk), or ESPS/Waves+ (Entropic Signal Processing System) by Entropic Research Laboratory (URL: www.entropic.com).
I am very grateful to the Summer Institute of Linguistics and to Arnd Strube for making the MacCECIL software available and for generous technical support as well.