SLV2 is a library to make the use of LV2 plugins as simple as possible
This is a bugfix release. 0.6.1 failed to recognize any LV2 features.
Upgrading is strongly recommended. Let us all just pretend that 0.6.1
never existed. 0.6.1 is not to be invited to any parties. It will sit
alone for the holidays, cursing haste and drinking alone.
Changes this release:
- Fix feature detection
- Add --no-jack configure flag for building without jack dependency
(i.e. don't build jack clients; slv2 itself never depends on jack)
In this release:
* zynjacku codebase updated to the latest state of LV2 art. Especially,
event MIDI port synths are now supported.
* The tarball now contains lv2rack - a host for LV2 effect plugins.
* Saving/restoring of presets. Does not work for dynparam plugins yet.
* LASH support (autodetected at runtime).
* Lot of general fixes that should make zynjacku more usable.
I would like to thank Krzysztof Foltman for adding support for
some LV2 extensions and Martin Raspaud for helping with slv2
compatibility during my LADI quest.
zynjacku is JACK based, GTK (2.x) host for LV2 synths. It has one JACK
MIDI input port (routed to all hosted synths) and one (two for stereo
synths) JACK audio output port per plugin. Such design provides
multi-timbral sound by running several synth plugins.
zynjacku is a nunchaku weapon for JACK audio synthesis. You have solid
parts for synthesis itself and you have flexible part that allows
synthesis to suit your needs.
lv2rack is a host for LV2 effect plugins.
You need slv2 library, Pyhton bindings for PATH and lv2dynparam host
library to compile zynjacku tarball.
Project homepage with screenshots:
Get tarball from here:
Nedko Arnaudov <GnuPG KeyID: DE1716B0>
* Fixes a bug relating to a gap between the pre-buffer and the
* Adds OSC control starting and stopping recordings
* Adds an option to make the filenames Windows friendly
* Update to match current JACK API
The repository is now hosted at github, at http://github.com/swh/timemachine/tree/master
, should anyone wish to develop it further.
Tarball containing D-Bus patched jack 0.115.6 is available here:
D-Bus modifications add optional autodetected support for the D-Bus
based server control system.
D-Bus is object model that provides IPC mechanism. D-Bus supports
autoactivation of objects, thus making it simple and reliable to code a
"single instance" application or daemon, and to launch applications and
daemons on demand when their services are needed.
* Simplified single thread model for control and monitor
applications. Various D-Bus language bindings make it trivial to
write control and monitor applications using scripting languages like
Python, Ruby, Perl, etc..
* JACK has log file (~/.log/jack/jackdbus.log) that is available for
inspection even when autoactivation happens because of first JACK
application is launched.
* There is real configuration file used to persist settings that can be
manipulated through configuration interface of JACK D-Bus object.
* Improved graph inspection and control mechanism. JACK graph is
versioned. Connections, ports and clients have unique (monotonically
increasing) numeric IDs.
* High level abstraction of JACK settings. Allows applications that can
configure JACK to expose parameters that were not known at compile
(or tarball release) time.
Currently there are some minor differences between jack1 jackdbus and
* There is no parameter constraints support (no enums and no ranges)
* No get client pid function (probably affects lash)
* Settings file (in ~/.config/jack/) is conf-jack1.xml instead of
conf.xml, because jack1 and jack2 settings and not really compatible.
When configured with D-Bus support, jack_control is
installed. jack_control is simple commandline interface for jackdbus.
Other tools that can communicate with JACK through D-Bus:
* LADItools (tray icon, configuration, etc.)
* Patchage (and lpatchage too)
* LASH 0.6.x (may not work properly with jack1 jackdbus implementation)
Nedko Arnaudov <GnuPG KeyID: DE1716B0>
The version 0.0.17 of Calf Audio Plugin Pack has been released. This is
the first release after Calf team gained a second plugin developer, Thor
Calf is a set of open source instruments and effects for digital audio
workstations. Multiple plugin interfaces are supported: LV2, DSSI, JACK
(standalone application) and, for slightly outdated hosts, LADSPA.
The plugins are equipped with GTK+-based graphical user interfaces. Some
of these interfaces contain live (and accurate) graphs for easier
control over parameters. Unfortunately, that functionality is only
available in standalone version, or LV2 versions when used with Ardour
2.7, Zynjacku or LV2Rack.
Calf contains the following effects and instruments:
- (new in 0.0.17) smooth-sounding dynamic compressor
- (new in 0.0.16) multi-tap chorus
- organ-like polyphonic synthesizer
- a simple monophonic subtractive synthesizer
- tape-like delay
- multimode filter with parameter smoothing (inertia)
Recent versions of Calf also contain a set of about 50 plugins for
modular LV2 hosts (like Dave Robillard's Ingen). Logic gates and
flip-flops, basic filters, oscillators, multiplexers, arithmetic
operators - and other building blocks for creating interesting patches.
The source version of Calf can be downloaded from the following page:
Calf home page:
The Calf Team
Strasheela is a highly expressive constraint-based music composition
system. Users declaratively state a music theory and the computer
generates music which complies with this theory. A theory is
formulated as a constraint satisfaction problem (CSP) by a set of
rules (constraints) applied to a music representation in which some
aspects are expressed by variables (unknowns). Music constraint
programming is style-independent and is well-suited for highly complex
theories (e.g. a fully-fledged theory of harmony). Results can be
output into various formats including MIDI, Lilypond, and Csound.
This release improves Strasheela's export of sound synthesis
formats. For example, expressive timing of scores can be defined by
time shift functions. Predefined MIDI file export now supports also
non-note events like continuous controllers (e.g., pitch bend,
aftertouch, CC) and a global tempo curve. Additional examples have
been added, and further extensions and bug fixes have been made as
For more information on Strasheela, please visit
Changes are described at
This release can be downloaded from:
Interdisciplinary Centre for Computer Music Research
University of Plymouth
PianoBooster version 0.5.0 has just been released, this is the first
ever release of PianoBooster.
If you dabble in music and have a Midi Piano keyboard lying around
then give PianoBooster a go as it actually makes sight reading music
To see what it is all about take a look at the screen shot:
First choose a MIDI file (the Easy Play Beethoven is a good one -- see
the download page for where this can be found) then select which part
that you want to play along with (e.g. the piano part or the strings
part etc). Then select the "left" hand or the "right" hand or if you
are feeling really brave choose "both hands" and try to play along.
The "Follow You" mode make it really easy to sight read the scrolling
notes as the whole accompaniment will stop and wait for you to find
and play the right notes.
The accuracy bar monitors how well you are playing. If you are skilled
enough the accuracy bar will go right to the end and then turn blue.
But every time you are too slow or playing out of time, then the
accuracy bar slips back a bit.
You can watch a video of it in action on YouTube:
Piano Booster 0.5.0 is released under the GPL and is available at
SourceForge on this page:
L o u i s B a r m a n
I released rakarrack-0.3.0, this is a bug fix version with few improvements.
- Excessive CPU usage when no input signal.
- Excessive CPU usage when jack port is disconnected.
- fltk Plastic schema.
- --no-gui option.
- MIDI implementation.
- other minor bugs.
- Up to 84 parameters can be controlled via MIDI control message. http://rakarrack.sourceforge.net/help.html#midispec
- Save/Load config for each instance of rakarrack.
- Documentation re-write.
Josep Andreu <holborn(a)telefonica.net>
Josep Andreu <holborn(a)telefonica.net>
We'd like to announce a new release of jackctlmmc, a command line tool for
driving JACK transport using Midi Machine Code that you can download here:
or get the code here:
The program is still in its infancy but it should work for most MMC devices.
It currently supports the following MMC commands:
Play / Deferred Play - start transport
Stop - stop transport
Rewind - go to time 0
Goto: go to the specified SMPTE time
It's a pretty simple command line utility for now, but we'll be working on a
QT front end soon. To use jackctlmmc:
1) start the program on the command line: ./jackctlmmc -f <your device's
SMPTE frame rate> -t <jitter tolerance in milliseconds>
You can also specify -v if you want it to output messages in the console for
all MMC commands it's handling, which is useful for testing.
2) connect your midi port to jackctlmmc using either aconnect or JACK's
connect (you will have to specify JACK's midi driver as "seq" if you want to
connect using JACK).
For the goto command to work, jackctlmmc needs to know your device frame
rate which you can specify with -f, or use the default 30 fps. Some MMC
devices (like my BR900CD 8-track) are awfully spammy with their goto
messages, so we've implemented a jitter tolerance (specified in milliseconds
on the command line with -t, defaulting to 50) so jackctlmmc will ignore
goto commands that are already close enough to the current JACK transport
There's still a lot of work to do on the application, but we've been getting
emails asking for progress updates, so we decided to do a quick release now.
Hopefully it's useful to people other than ourselves.
guitarix is a simple Linux Rock Guitar amplifier for jack(Jack Audio Connektion Kit)
with one input and two outputs. Designed to get nice thrash/metal/rock/blues
guitar sounds. There are controls for bass, treble, gain, preamp,
balance, distortion, freeverb, impulse response (), crybaby(wah) and
echo . A fixed resonator will be used when distortion is disabled. For
'pressure' in the sound you can use the feedback and feedforward
guitarix (0.03.0-1) unstable; urgency=low
* add advanced setting widgets for distortion, freeverb, ImpulseResponse and Crybaby
* rework the jconv settings window
* split code
guitarix (0.02.9a-1) unstable; urgency=low
* bugfix for run jconv port handling
* bugfix a typo in the Makefile for the LADSPAPATH
guitarix (0.02.9-1) unstable; urgency=low
* add a wet/dry fader for jconv
guitarix (0.02.8-1) unstable; urgency=low
* add more settings for jconv
guitarix based on Gtk, a great part is also realesed as ladspa plugin.
guitarix is licensed under GPL
Homepage with screenshots:
guitarix use now svn. You can browse the repostory here:
For capture guitarix make use of jack_capture ver >= 0.9.30 from Kjetil
S. Matheussen. If you dont have it installed, look here:
For Impulse Response guitarix make use of jconv from Fons Adriaensen. If
you dont have it installed, look here:
I use faust to build the prototype and will say thanks to
: Julius Smith
: Albert Graef
: Yann Orlary