Excerpts from hermann's message of 2010-02-18 07:11:46 +0100:
  guitarix is a simple Linux Rock Guitar amplifier and
is designed
 to achieve nice thrash/metal/rock/blues guitar sounds.
 Guitarix uses the Jack Audio Connection Kit as its audio backend
 and brings in one input and two output ports to the jack graph.
 Release 0.05.9-1 :
   * add Midi learn (by Andreas Degert)
   * add internal direct convolution unit with 7 filter kernel (amp models)
   * add LADI level1 support
   * add a new light skin
   * reworked multi thread handling(by Andreas Degert)
   * reduced CPU usage for Oscilloscope
 To the midi learn function: a middle mouse button click on a controller pop's
 up a little widget, move the midi controller you will use, the controller number
 is shown in the widget. Press OK when you've done. That's it.
 By the way, a right click on a controller pop up a spinbox for direct enter
 the value with your keybord.
 have fun
 ________________________________________________________________________
 guitarix is licensed under the GPL.
 Project page with screenshots:
          
http://guitarix.sourceforge.net/
 download:
          
http://sourceforge.net/projects/guitarix/
 For capture, guitarix uses the external application
 'jack_capture' (version >= 0.9.30) written by Kjetil
 S. Matheussen. If you don't have it installed,
 you can look here:
          
http://old.notam02.no/arkiv/src/?M=D
 For extra Impulse Responses, guitarix uses the
 convolution application 'jconvolver' created by Fons Adriaensen.
 If you don't have it installed, you can look here:
          
http://www.kokkinizita.net/linuxaudio/index.html
 I(hermann) use faust to build the prototype and will say
 thanks to
          : Julius Smith
          
http://ccrma.stanford.edu/realsimple/faust/
          : Albert Graef
          
http://q-lang.sourceforge.net/examples.html#Faust
          : Yann Orlary
          
http://faust.grame.fr/
  regards
         Hermann Meyer, James Warden, Andreas Degert
 
Sadly I get a build error:
[12/38] cxx: src/gx_engine_midi.cpp -> build/default/src/gx_engine_midi_1.o
./src/gx_engine_midi.cpp: In member function ‘void
gx_engine::MidiControllerList::writeJSON(gx_system::JsonWriter&)’:
./src/gx_engine_midi.cpp:211: error: call of overloaded ‘write(size_t&)’ is ambiguous
./src/headers/gx_system.h:63: note: candidates are: void
gx_system::JsonWriter::write(float, bool)
./src/headers/gx_system.h:64: note:                 void
gx_system::JsonWriter::write(double, bool)
./src/headers/gx_system.h:65: note:                 void gx_system::JsonWriter::write(int,
bool)
./src/headers/gx_system.h:66: note:                 void
gx_system::JsonWriter::write(unsigned int, bool)
./src/headers/gx_system.h:67: note:                 void
gx_system::JsonWriter::write(const char*, bool) <near match>
Build failed
 -> task failed (err #1):
        {task: cxx gx_engine_midi.cpp -> gx_engine_midi_1.o}
gcc 4.4.3
Regards,
Philipp