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The Snack Sound Toolkit is a cross-platform library written by Kåre Sjölander of the Swedish Royal Technical University with bindings for the scripting languages Tcl, Python, and Ruby. It provides audio I/O, audio analysis and processing functions, such as spectral analysis, pitch tracking, and filtering, and related graphics functions such as display of the sound pressure waveform and spectrogram.It is available on Microsoft Windows, Linux, Mac OS X, Solaris, HP-UX, FreeBSD, NetBSD, and IRIX.
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