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The Java Speech API is a freely available specification and therefore anyone
is welcome to develop an implementation. The following implementations
are known to exist.
Note: Sun Microsystems, Inc. makes no
representations or warranties about the suitability of the software listed here, either
express or implied, including but not limited to the implied warranties of
mechantability, fitness for a particular purpose, or non-infringement. The implementations
listed here have not been tested with regard to compliance to the JSAPI
specification, nor does their appearance on this page imply any form of endorsement of
compliance on the part of Sun.
FreeTTS on 
- Description:
Open source speech synthesizer written entirely in the Java programming language.
- Requirements:
JDK 1.4. Read about more requirements on the
FreeTTS web site.
The Cloud Garden
- Description:
Implementation for use with any recognition/TTS speech engine compliant with Microsoft's SAPI5 (with SAPI4 support for TTS engines only). An additional package allows redirection of audio data to/from Files, Lines and remote clients (using the javax.sound.sampled package). Some examples
demonstrate its use in applets in Netscape and IE browsers.
- Requirements:
JDK 1.1 or better, Windows 98, Me, 2000 or NT, and
any SAPI 5.1, 5.0 or 4.0 compliant speech engine (some of which can be
downloaded from Microsoft's web site).
Lernout & Hauspie's TTS for Java Speech
API
- Description:
Implementations based upon ASR1600 and TTS3000 engines, which support
command and control and speech synthesis. Supports 10 different voices
and associated whispering voices for the English language. Provides
control for pitch, pitch range, speaking rate, and volume.
- Requirements:
Sun Solaris OS version 2.4 or later, JDK 1.1.5.
Sun Swing package (free download) for graphical Type-n-Talk demo.
- More information:
Contact Edmund Kwan,
Director of Sales, Western Region Speech and Language Technologies
and Solutions (ekwan@lhs.com)
Conversa Web 3.0
- Description:
Conversa Web is a voice-enabled Web browser that provides a range of
facilities for voice-navigation of the web by speech recognition and
text-to-speech. The developers of Conversa Web chose to write a
JSAPI implementation for the speech support.
- Requirements:
Windows 95/98 or NT 4.0 running on Intel Pentium 166 MHz
processor or faster (or equivalent). Minimum of 32 MB RAM (64 MB
recommended). Multimedia system: sound card and speakers. Microsoft
Internet Explorer 4.0 or higher.
Festival
- Description:
Festival is a general multi-lingual speech synthesis
system developed by the Centre for Speech Technology Research at the
University of Edinburgh. It offers a full text to speech system with
various APIs, as well an environment for development and research of
speech synthesis techniques. It is written in C++ with a Scheme-based
command interpreter for general control and provides a binding to the
Java Speech API. Supports the English (British and American), Spanish
and Welsh languages.
- Requirements:
Festival runs on Suns (SunOS and Solaris), FreeBSD,
Linux, SGIs, HPs and DEC Alphas and is portable to other Unix machines.
Preliminary support is available for Windows 95 and NT. For details and
requirements see the Festival download page.
Elan Speech Cube
- Description:
Elan Speech Cube is a Multilingual, multichannel, cross-operating system
text-to-speech software component
for client-server architecture. Speech Cube is available with 2 TTS
technologies (Elan Tempo : diphone concatenation and Elan Sayso : unit
selection), covering 11 languages. Speech Cube native Java client supports
JSAPI/JSML.
- Requirements:
JDK 1.3 or later on Windows NT/2000/XP, Linux or Solaris
2.7/2.8, Speech Cube V4.2 and higher.
- About Elan Speech:
Elan Speech is an established worldwide provider of
text-to-speech technology (TTS).
Elan TTS transforms any IT generated text into speech and reads it out loud.
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