Free speech synthesis software for linux

speechd-el is an Emacs client to Speech Dispatcher, BrlTTY, and other alternative output devices.
speechd-el provides a complex speech/Braille interface to Emacs, and is focused especially on (but not limited to) blind and visually impaired users.
It allows the user to work with Emacs without looking on the screen, using the speech and Braille output.
Enhancements:
- The output mechanism was modularized and redesigned to support multiple output devices.
- The most important impact of this change is BrlTTY support, which works in a way similar to how speech output works.
- This means that speechd-el can be used with both Speech Dispatcher and BrlTTY now.

Speak Good Chinese is a cross-platform application based on GTK technology that allows you or your students to train their Mandarin pronunciation. Our software is based on Praat, leading software in speech analysis. Our speech technology is backed by the Institute of Phonetic Sciences part of the University of Amsterdam.
SpeakGoodChinese software was supported financially by the DU. Questions can be mailed to stefandekonink@xs4all.nl, they will be forwarded to the appropriate project member.
Enhancements:
- This release makes administrative tasks easier for teachers or students that want to manage or distribute their own wordlists.
- Another new feature in this subsystem is the shuffle function.
- Several bugs were solved related to cleaning up old recordings.
- New documentation was added.

PlanetGenesis is a Java program designed to produce models of planets and landscapes.

A little like Mojoworld but free (as in beer and speech) and no where near as good.

PlanetGenesis produces:

- 16bit greyscale bitmaps.
- Wavefront format objects.
- POV-RAY 3.5 mesh2 meshs.
- Terragen terrains.

based on pseudo-random noise. Which can be used in 3D rendering sofware.

GNOME Speechs purpose is to provide a simple general API for producing text-to-speech output.
The GNOME Speech 1.0 API is currently under development, and it will provide API for both text-to-speech output as well as speech input. It will be heavily influenced by the Java Speech API, both the existing 1.0 specification, and the new 2.0 one which is currently under development.
GNOME Speech 0.4 is made up of three basic parts:
- IDL interface definitions
- libgnomespeech - Convenience library for speech driver development
- Java package to aid in developing GNOME Speech drivers in Java
- Sample driver implementations

F Modular Synthesizer (FMS) is basically a tool to generate all kinds of sounds. It should work on any up-to-date Linux system.
Main features:
Playing sounds
- with any frequency and volume
- one after another or at the same time (mixer) or both
- stereo (different sounds on different channels)
- with any balance between the two channels
- with built-in sweep that even follows frequency modulation
- like speech synthesis [listen]
- both on-the-fly playing with direct user access and asynchronous, pre-computed output; also combining the two, taking the best of both
- with all modulation options described below
Making noise
- now although it tends to get noisy in any way, we mean real noise here
- in 4 different ways
- nearly-white noise
- narrow band noise
Modulating
- amplitude (volume)
- frequency
- minima, maxima, amplitude and frequency of the modulation (here the "Fully Modular" comes to existence)
- balance, moving the sound from left to right and back in stereo mode
- narrowness of the noise frequency band in many different ways
Making music
- some-kind-of-midi-mapping mode (sound + envelope => instrument, FMS midi file format)
- auto-converter and player for MUS file format, listen [here] (Musplay)
- auto-composer for those who like a rather modern kind of music
- chords
Displaying
- spectrum of a sound
- oscillogram of a sound
- mixes between different sounds with different volumes / frequencies
Saving
- sounds as oscillograms in FMS file format (mathematical description, not complete wavetables)
- sounds as Fourier overtone amplitudes
- music in FMS midi format
- FMS output in wave format
- wave file sounds in FMS file format (auto-converter) - experimental
GUI
- a somewhat ugly and extremely limited tcl/tk gui
- FROCOR, an installation that connects the FMS sound backend to graphical interfaces and outputs
- a fully modular Qt GUI - experimental, but Ill give you a [screenshot]
Enhancements:
- This release fixes all bugs discovered via user feedback, and should be quite stable.
- Sweep frequency modulation is now implemented, and using both blur and frequency modulation on the same sound at the same time is possible.

OO Text To Speech is a text-to speech macro for OpenOffice.org.

Its a syllable analyzer: using a reading motor, it reads a document and translates it into a vocal message.

About OpenOffice

OpenOffice.org is a multiplatform and multilingual office suite and an open-source project. Compatible with all other major office suites, the product is free to download, use, and distribute.

It is an international office suite that will run on all major platforms and provide access to all functionality and data through open-component based APIs and an XML- based file format.

Speegle Define is a Firefox extension that gives a spoken definition of a word using Speegle Speech Technology. You highlight the word you would like explained with highlight left click on any internet page you are reading.

Right click and choose "Audio Definition" from the pop up menu and its definition will be read back to you in English through your speakers or headphones.