Soundtank

Soundtank is a program that hosts musical instruments for you to play; each instrument can be controlled via MIDI. You can create custom instruments and save them to files, and can also load instruments that other people create. It relies on LADSA plugins, as it has no built-in sound synthesis algorithms, but hosts them in "realtime objects" which embody the structure of the audio signal flow. RTObjects can be controlled in a completely customizable fashion using MIDI events sent through the ALSA sequencer interface. Soundtank outputs audio through ALSA or JACK.