Snd is a sound editor
audio sequencer
An entire virtual orchestra in LV2 plugin format
Entrain your brain!
Text-to-Speech for Basque and Spanish
Text-to-Speech TTS for Basque, Spanish, Catalan, Galician and English
A real-time SoundFont software synthesizer
DSSI is an audio plugin API for soft synths and effects.
C++ class library for sound analysis, synthesis, and morphing
TTS for Basque Lapurdian dialect
Buzztrax is a modular music composer for Linux
patch editor for the E-MU Proteus 2000 synthesizer family