Abstract
Programs for interactive editing and spectrographic display of digitized speech waveform files have been developed for use on IBM-PC compatible computers. The waveform editing program (WavEd) reads and writes waveform files of several types, including ILS sampled data. WavEd allows the user to perform the following operations: (1) record and play waveforms; (2) place labels at various points, and save these labels; (3) copy, delete, and insert waveform segments; and (4) do acoustic analyses, such as computation of durations, formant frequencies and bandwidths, and linear prediction coefficients. The spectrographic display program (SPECTO) produces spectrograms from ILS sampled data files using filters of user-specified bandwidths. Parameters that determine spectrogram appearance (such as darkness, contrast, and frequency and time range) are user controlled. Spectrograms can be sent to the PC monitor or to dot-matrix or laser printers. Both programs are designed to be easy to install and to use on any PC, with either a commercial digital-to-analog converter or the PC-internal speaker. Both programs are being distributed as unsupported software and nonprofit redistribution is permitted. [Work supported by NIH.]
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