jack_oscrolloscope

jack_oscrolloscope is a simple waveform viewer for JACK. The waveform is displayed in realtime, so you can always see the signal the instant it comes through JACK's input port.

This project is released unter the GNU General Public License.
Installation:

In the jack_oscrolloscope source directory, run:

make
and then, as root:
make install

or, to install somewhere else than /usr/local, e.g. /usr:

make PREFIX=/usr install

Usage:

Command line options:

jack_oscrolloscope [ options ] [ port1 port2 ... ]

-n < number > number of input ports
-d < seconds > duration of audio being displayed (default 5s)
-c indicate clipping
-s disable scrolling
-x < pixels > set window width
-y < pixels > set window height
-g use OpenGL for drawing
-f < fps > video frames per second (default 50, 0=unlimited/vsync)
-h show this help

Config file:

You can put default options into the config file ~/.jack_oscrolloscoperc. This file should consist of one single line, with the options just like you would have entered them on the command line.

Options given on the command line override those in the config file. To override options which take no arguments, append 0. E.g. to override "-s", use "-s0".

Port arguments are not yet supported in the config file.

What is new in this release:

• OpenGL is now used for drawing by default, but can still be disabled using the -G command line option.
• Added command line options -C, -S and -Y to set color, waveform scaling and height on a per-port basis.
• Worked around possible lock-up problems in cases where drawing can't keep up with incoming audio samples.
• The duration specified with -d can now be a floating point number. * Some code cleanup.

What is new in version 0.6:

• This version adds a command line parameter to set the JACK client name.

Requirements:

• Jack audio connection kit
• SDL
• OpenGL