JACK Audio Connection Kit

Multi-Channel Recording

Suppose we need to record a multi-channel song with vocals and a synthesizer as instruments. We have a MIDI keyboard , a software (virtual) synthesizer on the computer, as well as a microphone connected to the input of the sound card. For some reason, we want to record both tracks simultaneously. Then, using JACK, we can connect:

1. MIDI keyboard to a virtual synthesizer;
2. The sound output of the synthesizer to the audio card (to hear that we are playing);
3. The sound output of the synthesizer to the corresponding track of the recording program;
4. The sound input of the audio card (a microphone is connected there) to the corresponding track of the sound recording program.

Accordingly, when we click on the recording, these two tracks will be recorded synchronously.

Duplicate Translation

Another example is not related to recording music. Due to the fact that JACK is supported by any of the well-known video players in Linux (and audio players, of course), you can still connect the microphone to the track of the recording program, but, in addition, also connect this program to the video player. This way you can watch a movie and translate it. Moreover, moving through the film will lead to a similar movement along the recorded sound track and vice versa.

Here are some “jacked” applications.

• Aqualung - a music player using GTK
• Ardor - free DAW- program for Linux
• Baudline - a signal analysis utility
• Bitwig Studio - a proprietary professional DAW program
• CheeseTracker - Impulse Tracker clone
• ChucK - real-time audio programming language
• Fluidsynth - software MIDI engine
• Freqtweak - Digital Equalizer
• Guitarix - a program for processing the signal of an electric guitar (distortion) and tuning the guitar
• Hydrogen - an advanced drum machine
• MusE - Qt -based MIDI / Audio Sequencer
• Pure Data - a graphical , multimedia programming language
• qjackctl - Qt-based Jack management tool
• Rakarrack - emulator, virtual guitar processor
• Rosegarden is another free DAW program for Linux.
• SuperCollider - real-time audio programming language
• XMMS - a free music player for X11
• XMMS2 - client-server XMMS
• ZynAddSubFX - an open source software synthesizer
• TuxGuitar - midi editor, tab editor

• Allegro - a computer game programming library
• bio2jack - a library that simplifies porting applications that block I / O ( blocked input / out , bio) OSS or ALSA to Jack
• libjackasyn is a library that converts programs written for the OSS system into programs that understand JACK

• LADSPA
• Free audio software
• PulseAudio
• aRts
• Rewire

• Official site
• Documentation