Free jack software for linux

JJack is a framework for the Java programming language. JJack allows creating and running audio processor clients for the JACK Audio Connection Kit:

- Uses Java to create audio processors (effects processors, synthesizers etc.).
- Provides a JavaBeans-compatible event mechanism to interconnect audio processors.

Native bridge code uses new java.nio.ByteBuffer for direct memory access from Java.

Installation:

Unpack the distribution archive jjack-0_2.tgz to /usr/java. A directory /usr/java/jjack_0-2 will be created. You can also choose a different directory, in that case the absolute path values in the shell-scripts bin/jjack.sh and bin/runBeanBuilder.sh need to be adopted to your choice.

The native bridge library libjjack.so (on Linux systems) needs to be accessible by the Java Virtual Machine (JVM).

There are two ways to make sure the JVM can load the native bridge library:

- Copy the file /lib/ / /* to the systems default library path. On Linux:

cp ./lib/i386/linux/libjjack.so /usr/lib/

Alternatively create a filesystem-link to the binary file at the systems default library location:

cd /usr/lib
ln -s < jjack-install-dir >/lib/i386/linux/libjjack.so

- Or the library-path can directly be set through the JVM system property "java.library.path". Add the parameter "-Djava.library.path=< jjack-install-dir >/lib/i386/linux" to the invocation command.

Note: The current version includes a pre-compiled binary library for i386-Linux. To run JJack on different platforms, the source files libjjack.c and libjjack.h need to be compiled on your system. Please send a copy of the binary and a description of your compilation process if you succeed in running JJack on different platforms.

Before using JJack, dont forget to start the JACK daemon. This is either done by manually invoking jackd, or by configuring the system to start up jackd at boot time. There are several alternative ways to configure and run the daemon, see the JACK user documentation for details (http://www.djcj.org/LAU/jack/).

MadJACK is a MPEG audio deck for the Jack Audio Connection Kit with an OSC-based control interface. MadJACK was written as a backend for DJ music playback.
Main features:
- Lightweight
- Talk natively to JACK
- Easy to script / remote control
- High Quality audio
- Skip free playback
- Responsive / Low Latency
- Reliable / Not Crash

Jack Meter is a basic console based DPM (Digital Peak Meter) for JACK. I wrote it for quickly checking remote signal levels, without having to run X11 to use a pretty graphical meter such as meterbridge.
Usage
Usage jack_meter [-f freqency] [-r ref-level] [-w width] [-n] [< port >, ...]
where -f is how often to update the meter per second (8)
-r is the reference signal level for 0dB on the meter
-w is how wide to make the meter (79)
-n changes mode to output meter level as number in decibels
< port > the ports to monitor (multiple ports are mixed)
Enhancements:
- uses new JACK API (and hence requires JACK version 0.100.0)
- connects multiple ports on the command line
- informational messages are new sent to STDERR
- added -n option to output level as number in decibels

JACK Rack is an effects "rack" for the JACK low latency audio API.

The rack can be filled with LADSPA effects plugins and can be controlled using the ALSA sequencer. JACK Rack is phat; it turns your computer into an effects box.

libJackMM is a C++ API library for JACK audio connection kit. It allows easy object based access to JACK functionality.

Exception.hh is included for convenience, complete set of C++ headers come
with libDSP library, available from http://libdsp.sf.net .

oss2jack creates an OSS device which redirects its input and output to the Jack Audio Connection Kit. oss2jack supports a large subset of the OSS specification, including full duplex I/O and mmap.
oss2jack uses Jeremy Elsons useful fusd library to create a userspace character device, which is also a jackd client.
It supports mono and stereo streams, with virtually any sample rate thanks to libsamplerate. Only the commonly-used OSS ioctls are currently supported.
Enhancements:
- A few minor bugs that prevented smooth operation with Asterisk were fixed.
- In addition, oss2jack can now host jackd, allowing the user to run a long chain of processes with oss2jack and jackd.

network jack is an Internet troubleshooting and information gathering tool. It provides a Web interface to several common command-line tools, including ping, traceroute, dig, and whois, as well as a subnet mask and CIDR block calculator.
Current Modules which you can find in the application:
Pinger
- Ping a host on the internet (currently only IPv4)
Tracer
- Traceroute to a host on the internet from the web server (currently only IPv4)
Digger
- Do a DNS Dig of a hostname or IP address (for reverse lookups)
Drooler
- block list lookup (aka RBL query, blackhole lookup)
Whoser
- lookup for domain names and IP addresses / blocks
Netter
- Mask / CIDR calculator
Linker
- Front" page for the tools, provides spot for links
Main features:
- It is intended to be easy to add new modules
- Seperates html code into its own file so can be customized without modifying the program files