Flite TTS Engine for Android
Flite (festival-lite) is a small, fast runtime speech synthesis engine developed at Carnegie Mellon University and primarily designed for small embedded devices. Flite is an opensource synthesis engine that can be used to provide text-to-speech functionality on smartphones and similar devices. For more information about Flite, visit www.cmuflite.org
This application wraps the Flite engine so that it can be installed as an application on Android devices. This app gets installed as a TTS library, thereby allowing other applications to make use of Flite for synthesis.
Installing this Application
This app is not yet available on the Google Play Store, but you can generate an apk file by building this source code, or download an APK file from the Github page and install it on your device. Devices running Android versions 2.2 (Froyo) or later are supported.
After installing this application, you will have to:
- Enable Flite from "Text to Speech Settings" on your phone
- Install voice data
- Go to "Language" settings and select the voice that you want.
By clicking on "Listen to a sample" you can verify that Flite is working.
Using Flite for TTS in Your Application
If you are developing an application and would like to use Flite for speech synthesis, you can specify "edu.cmu.cs.speech.tts.flite" as the package name of the engine to use.
Building this App from Source
Instructions here are for development on Linux.
In order to build this application, you need the following:
- Flite 1.5.6 or later. This latest release is not available for download on the Flite website. A version can be downloaded from http://tts.speech.cs.cmu.edu/aup/distr/android/flite-1.5.6-current.tar.bz2
- Android NDK Release 8
- Android SDK Release 20
Application Build Steps
Export necessary environment variables
export FLITEDIR=/path/to/flite-1.5.6 export FLITE_APP_DIR=/path/to/this/application export ANDROID_NDK=/path/to/android/ndk export ANDROID_SDK=/path/to/android/sdk
Build Flite Engine for multiple architectures
cd $FLITEDIR ./configure --with-langvox=android --target=armeabi-android make ./configure --with-langvox=android --target=armeabiv7a-android make ./configure --with-langvox=android --target=x86-android make ./configure --with-langvox=android --target=mips-android make
Build installable application package (debug mode)
cd $FLITE_APP_DIR ant debug