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LASH stands for LASH Audio Session Handler. It is a session management
system for audio applications on GNU/Linux. It understands the
JACK low latency audio API and the ALSA MIDI sequencer interface. The
system is comprised of a server program, lashd
, an application
library, liblash
, and a control program - either the command-line
lash_control
or the GTK lash_panel
. The server and
clients communicate over TCP sockets. There are three kinds of clients:
normal clients (audio applications), user interfaces for the server,
and connection patchbays.
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In order to describe the system, we should introduce some terminology.
First of all, the server is the lashd
server program, an
omni-present marshaller and database for storing arbitrary application
data. The library is the ‘liblash’ shared library.
It contains all the functions that an application uses to communicate
with the server and take part in the system. Such an application is
called a client.
The server deals with things in terms of collections of clients,
called projects. A project has a unique string name, a current
directory and a list of clients that are in that project. The server
can have one client that is a server interface that allows the
user to control the server. There are two server interface included
with the system, the lash_control
command-line interface,
and the lash_panel
GTK interface.
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