From LinguisticAnnotation
Snack (Kåre Sjölander)
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.