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.
BpmDj is a program that can be used by a DJ. It plays MP3 and Ogg files. It has a fully automatic BPM counter. It can determine the sound color. It has a full fledged Qt based interface. It will help you manage a large amount of songs. It can help in creating playlists and has proven to be very robust. The program also allows offline automatic mixing and contains a wavelet based beat graph analyzer to visualize audio tracks.
GSmartMix provides a smart control of the audio on GNOME. There is also an applet which allows manual adjustment of sound per application. Each application using GStreamer can benefit from this project without any intrusive patch. Other applications should implement the D-Bus interface proposed with GSmartMix to be seen by the smart manager.
IRMix is an audio mixer application for Linux. It uses the Lirc infra-red receiver system to provide an imitation of a TV's on-screen display, and handles making audio volumes controllable from an infra-red remote control. If your X server supports the Xft extension, Irmix will use it to add a nice translucency effect to the OSD window.
JackMaster is a master-mixer for jackd that (unlike jackeq) works like a real console, with a simple fader -> subgroup -> master routing. Unlike jackmix, it has faders instead of knobs. It features low CPU usage, optional session management with LASH, and optional fader automation with the ALSA sequencer.