Mp3VoiceStamp ~ Automatic Voice Annotation


Athletes’ companion: adds synthesized voice overlay with various info and on-going timer to your audio files.

Features:

  • Automatic voice volume adjustment based on music file volume
  • Supports batch processing of multiple files
  • Features dry-run mode for quick tests
  • Highly customizable
  • Minimal runtime dependencies
  • Works on Linux, Mac OS and Windows
  • Free

github.com/MarcinOrlowski/Mp3VoiceStamp

WaveSurfer ~ Visualize & Manipulate Sound


WaveSurfer is an open source tool for sound visualization and manipulation. Typical applications are speech / sound analysis and sound annotation / transcription. WaveSurfer may be extended by plug-ins as well as embedded in other applications.
Features:

  • Customizable – users can create their own configurations. Localization support.
  • Extensible – new functionality can be added through a plugin architecture.
  • Embeddable – WaveSurfer can be used as a widget in custom applications.
  • Transcription file formats – reads, and writes HTK (and MLF), TIMIT, ESPS/Waves+, and Phondat. Support for encodings and Unicode.
  • Multi-platform – Linux, OSX & Windows.

WaveSurfer

sourceforge.net/projects/wavesurfer
en.wikipedia.org/wiki/WaveSurfer