The Advanced Linux Sound Architecture is composed of several parts. The first is a fully modularized sound driver which supports module autoloading, devfs, isapnp autoconfiguration, and gives complete access to analog audio, digital audio, control, mixer, synthesizer, DSP, MIDI, and timer components of audio hardware. It also includes a fully-featured kernel-level sequencer, a full compatibility layer for OSS/Free applications, an object-oriented C library which covers and enhances the ALSA kernel driver functionality for applications (client/server, plugins, PCM sharing/multiplexing, PCM metering, etc.), an interactive configuration program for the driver, and some simple utilities for basic management.
LIRC is a package that supports receiving and sending IR signals of the most common IR remote controls. It contains a daemon that decodes and sends IR signals, a mouse daemon that translates IR signals to mouse movements, and a couple of user programs that allow to control your computer with a remote control.
mgadvd is a Matrox G200/Zoran 36700 hardware MPEG decoder driver for Linux. It allows you to play MPEG-1, MPEG-2, and DVD streams through the Zoran 36700 Vaddis III decoder (connected to the G200) with very low CPU usage. Supported DVD audio formats are AC3 (Dolby Digital) and PCM. Included is a player app called mzplay that plays DVD directly from the disc as well as MPEG-1 and MPEG-2 video and audio (Layer II only) files.
Mjpeg tools is a suite of programs which support video capture, basic editing, playback, and compression to MPEG-1/2 of MJPEG video. The capture software allows MJPEG video streams in AVI, Quicktime, and movtar format to be produced using the Iomega Buz, Miro DC10+, Matrox Marvel, and similar hardware. The editing and playback tools are hardware independent, with support for hardware accelerated playback if present. The MPEG compression tools are based on MPEG Software Simulation Group's reference encoder with enhancements to provide far faster compression and significant quality improvements.
Maudio is a simple audio mirroring device (a sort of audio pipe). Unlike a filesystem pipe, maudio behaves as a hardware soundcard. In particular, after installation of the driver, you get two audio-like devices (usually /dev/dsp0 and /dev/dsp1) which are connected to each other. Everything sent to the first DSP will appear as sound data on the second DSP and vice versa.