Praat is a speech analysis tool used for doing phonetics by computer. Praat can analyse, synthesize, and manipulate speech, and create high-quality pictures for your publications. Praat was created by Paul Boersma and David Weenink of the Institute of Phonetics Sciences of the University of Amsterdam. Some of Praat’s most prominent features are: Speech analysis Speech synthesis Speech labelling Grammar models Statistical analysis
eXtace is a Audio Visualization plugin for the X-Window System. It connects to ESD (Enlightened Sound Daemon) and displays the audio data as either a pseudo 3D flying landscape, pseudo 3D pointed landscape, 16-256 channel graphic EQ, multi-mode Oscilloscopes, Horizontal Spectrogram, or a combination Hi-res FFT with a Vertical Spectrogram. All modes are fully scalable to nearly ANY resolution! (within your CPU/X11 capabilites) Resolutions up to 1600x1200 at 40 FPS use typially less than 30% CPU,
Parlatype is a minimal audio player for manual speech transcription, written for the GNOME desktop environment. It plays audio sources to transcribe them in your favourite text application.