LASH is a session management system for JACK audio and ALSA MIDI applications on Linux. It consists of a daemon, a client library, a server control tool, and a number of example applications. Its aim is to allow users to have many different audio programs running at once, to save their setup, close them down and then reload the setup at some other time. It doesn't deal with any kind of audio data itself; it just runs programs, deals with saving/ loading data, and connects different kinds of virtual audio ports together.