Snack is a general toolkit to handle acoustic data with an emphasis on speech. It features real-time visualization, supports many file-formats, and is extensible. A speech signal viewer and phonetic label editor is included in the package. There is also a Snack “plug-in” for web browsers. Wavesurfer is a tool based on Snack.

http://www.speech.kth.se/wavesurfer/

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