synthesis

Ingen is a modular audio processing system for GNU/Linux audio systems using the Jack audio server and LV2 or LADSPA plugins. It can be used to create modular synths by using synth plugin modules.

Any saved Ingen graph can be loaded as an LV2 plugin on any system where Ingen is installed. This allows users to visually develop custom plugins for use in other applications without programming.

Hexter is a software synthesizer that models the sound generation of a Yamaha DX7 synthesizer. It is available as a DSSI plugin and also as a standalone client.

ZynAddSubFX is a open source software synthesizer capable of creating a countless number of instruments. It is feature rich and has a large number of parameters. It includes three hybrid synth engines that combine additive, subtractive, fourier and other synthesis methods. ZynAddSubFX is available as a standalone, LV2 and DSSI plugin.