DBMix is a software DJ mixing system for digital audio. DBMix allows a user to output multiple simultaneous audio streams on a single sound device, and to transform/modify each stream independently. There are five main components to DBMix:
- Fourier Synthesis Daemon - this is a daemon application
that handles adding multiple data streams into a single data stream for
output, allowing you to play multiple songs simultaneously with a single
soundcard. Each data input stream to the fourier synthesis daemon is refered to as a "channel", because this is the name given to each input to an analog DJ Mixer.
- Clients - responsible for creating input to the system, and writing the data to a dbfsd channel. Example generators are xmms, mpg123, and sox.
- DBAudiolib - this is the client interface API to dbmix.
It provides transparent format conversion and pitch/speed control.
- Mixer - the mixer is the user interface to the DBMix system. It allows a single interface to control all input channels. An example of a mixer is the DBMixer application. DBMixer allows the user to mute, change volume, cue, and crossfade inputs
- Peripherals - hardware devices that you can use
to control aspects of dbmix. See the section on exmixer below for and
- Output multiple audio channels (up to 8 inputs) using a single sound device
- Cueing support using multiple soundcards. (ability to have one sound device used for a master output, and a second sound device for headphones)
- Cueing support using a single soundcard.
- Supports the standard digital audio format of 16bit signed data at 44.1 KHz
- Use of the Open Sound System for sound device control
- Session recording to a wav file (controlled by the dbmixer options menu)
- A single DJ Mixer style GUI interface for controlling DBMix channels.
- Independent channel controls: volume/gain/level, pitch/speed control +/-
10%mute, cue, and pause.
- IPC layer to allow the mixer to control the play/pause/stop/etc of dbmix client programs.
- Punch buttons (allows you to add in the muted crossfader input. Handy
for popping in sound bytes)
- Control of master and cue soundcard mixers
- Swap master and cue soundcards on the fly
- Autofade buttons with fade speed control
- L/R Balance control
- Clipping notification
- The mixer is optionally controled by an external device. See section
- Digital Sampler with start/end editing abilities, and Load/Save samples
- Beat matching synchronization tools (sorry no UI yet)
- Multiple client support: xmms output
plugin, mpg123, dbcat, HREF="http://www-stud.fht-esslingen.de/~alkoit00/tX">terminatorX, gqmpeg
(Note: to use gqmpeg, openthe preferences dialog, choose the Output tab, and
enter "-s" in the User options field to enable output to stdout. To launch
gqmpeg, type "gqmpeg | dbcat &" at the command prompt)
- speed/pitch control.
- format conversion from:
- 8 bit signed mono and stereo data
- 8 bit unsigned mono and stereo data
- 16 bit signed mono and stereo data
Review of DJ Speakers