What does the name mean, "Rakarrack"?
Rakarrack is the sound produced when muting the strings with the fret hand while strumming the guitar.
Why do I have incredible noise on some presets?
Rakarrack does not generate any noise internally. You can prove this if with the same preset you connect the input of Rakarrack to a software synthesizer like ZynAddSubFx, for example, or other software instrument that does not make sound unless you are playing. The noise comes from your sound card, your guitar, cables, preamp->>somewhere from outside of your computer. Some effects in Rakarrack amplify the signal more than 10.000 times, and then makes audible the noise that is already there.
How to remove this noise?
The hardware way, is use a pre-amp between you guitar and your soundcard, also a good soundcard with balanced inputs can help. Rakarrack has a Noise Gate, you can put this effect at the beginning of the chain then adjust the threshold and range just to remove the noise. Both Noise Gate and Expander are good for this purpose. Read Help to find out the difference.
You may also wish to use Jack-Rack with an FFT-based noise removal plugin. It's processor intensive, but a little more smart than the average noise gate.
Why do you use FLTK?
Because it is fast and light, does the work and we love them.
Rakarrack starts but why don't I have any sound?
If you use ALSA, the first thing you need to use rakarrack is know how to configure the capture screen of alsamixer (F4). When the alsamixer settings are done you only need a jack connectivity program like qjackctl or patchage and read the help provided by rakarrack.
Why when I run rakarrack I receive a "Illegal Instruction" message?
This is probably because you use a rakarrack binary program packaged for your linux distribution. When the package maintainer compiles, the configure scripts attempt to find the best set of instuctions of your main CPU processor in order to boost performance by using faster hardware instructions. Probably the rakarrack maintainer of your linux distribution has a fast computer, and that rakarrack binary expects a set of instructions that your main computer processor doesen't have. The solution is compile your own binary (rakarrack is easy to compile). Read the README and INSTALL files provided by the sources package in order to install all the aditional packages needed to compile.
Why does rakarrack crash sometimes when I rename a preset?
That's a known bug with a Realtime Kernel. FLTK executes a malloc() instruction in the rename process. We can only hope that FLTK correct this in future versions.
Why on the website help there are effects or features that I don't have on my version?
Because, the website displays the help of our "git" development version. If you are interested in these effects/features you can "git" our development version. Please go to the Donwload page to read the instructions to get it. Ask questions in the forum or mailing lists for the project if you need help.
I made a mistake in the parameter settings and now rakarrack does not start?
The configuration file for all the instances of rakarrack are located in $HOME/.fltk/rakarrack.sf.net/rakarrack.prefs, to restore the settings you can edit this file with a text editor, or remove it.
My computer can't handle the presets that use Convolotron, what can I do?
Go to the audio settings and use the Downsample feature for Convolotron, read our help for the best resample settings.
Why rakarrack 0.5.8 use a lot of CPU?
They are some effects that use Convolution, a very expensive CPU
algorithm that performs a lot of calculations, also the Harmonizer
effects use a lot of CPU too, we have provide ways to reduce the CPU
usage of this effects, go to the Audio settings and Downsample to
16000,22050, Convolotron, Reverbtron StereoHarm or whatever effect you
see that use to much CPU, read the help to set the best settings as
possible for each effect.