Sonivox EAS for Linux and Qt
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Sonivox EAS for Linux and Qt

This project is a Linux MIDI Synth library based on the Sonivox EAS Synthesizer published by Google on the Android Open Source Project. It is a real time GM synthesizer without needing external soundfonts, using embedded samples instead. It consumes very little resources, so it may be indicated in Linux projects for small embedded devices.

The library uses ALSA Sequencer MIDI input and PulseAudio output. Complete compile-time dependencies are:

The project directory contains:

  • cmdlnsynth: Command line sample program using the synthesizer library
  • guisynth: GUI sample program using the synthesizer library
  • libsvoxeas: The Linux synthesizer shared library, using ALSA Sequencer and PulseAudio
  • sonivox: The AOSP source files, with a qmake project file to compile and test under QtCreator as a static library


Use your favorite IDE or text editor with the source files. My preference is QtCreator: To build, test and debug you may also find QtCreator interesting. You may also use CMake (>= 3.0) to build the project instead of qmake.


Copyright (C) 2016 Pedro López-Cabanillas.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

This project includes code from the Sonivox EAS synthesizer, Copyright Sonic Network Inc. 2006. Sonivox EAS belongs to the Android Open Source Project. It has been forked from the official repositories:

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

The Android robot is reproduced or modified from work created and shared by Google and used according to terms described in the Creative Commons 3.0 Attribution License.