Difference between revisions of "Linuxsampler"
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*[http://www.linuxmao.org/tikiwiki/tiki-index.php?page=linuxsampler LS ]
Revision as of 16:41, 9 July 2009
Linuxsampler is a software audio sampler.It can be loaded with libraries in the gigasampler format (.gig). A benefit of LS compared to other samplers available for linux, is its streaming from hard disk capabilities, allowing the usage of huge libraries (several GBs..). By now, "Linuxsampler" refers to a group of software interacting together :
- the sampler engine itself : linuxsampler
- a gig file editor : gigedit
- several graphical frontends : qsampler (QT based), jsampler-classic and jsampler-fantasia (both java based)
IMPORTANT NOTE 1 : Follow the installation order of theses components to get a working set of apps.
IMPORTANT NOTE 2 : All packages are available from AUR.The whole set can be grabbed as standard packages or cvs versions. Standard packages in AUR are up-to-date but the sources tarballs released by the LS team can be old. CVS versions are bleeding edge.They appear to work well in i686 and x86_64 architectures but it's never sure that all packages will build against each other at any time.
You should choose between a full set of standard packages OR cvs packages but do not mix them. Whatever you choose, but particularly with cvs packages, you should keep in a safe place a set of binary packages that work together.
The backend : Linuxsampler
It is the "engine" of the sampler, which performs all the heavy and time critical computational tasks of handling MIDI events, calculating the audio data and sending the final audio data to your sound card(s).LinuxSampler itself usually runs as own process in the background of the computer and usually does not show up anything on the screen, or at most it can be launched to show status informations and debug messages in a console window.Usually you will also need a frontend to control it.
Build and install :
and check that everything is ok :
then CTRL-c to quit.
The editor : Gigedit
Gigedit allows you to edit and create instruments for the Gigasampler format, which can be used with LinuxSampler as well as with Tascam's Gigastudio.You can use gigedit as stand-alone application without Linuxsampler running or in live-mode, started from any frontend ("edit" button).In this case, all your modifications are audible in realtime.
Build and install (optional, you can skip this step if you don't need the editor):
and check that everything is ok :
The editor should pop-up in "stand-alone" mode as indicated in the down-right corner. Close the window.
The frontend : Qsampler
This frontend provides the user a set of menus, buttons, sliders, dials, etc. to allow the user to control the sampler in a convenient way.It does not perform any signal processing tasks, so you can see it as a "face" of the sampler.From Qsampler you can load/unload .gig files into Linuxsampler and set their midi channel number, volume, jack output etc...and finally store all this setup in a file for a speedy re-opening of your "sampling orchestra".
Build and install :
Configuration via qsampler
Creating a configuration template
Here, I will use jack-keyboard as a midi controller, but everything below applies as well with a master keyboard or midi interface providing midi output.
- Start jack then jack-keyboard then qsampler
- Let's define some audio outputs in qsampler :
- Go to menu -> View -> Devices (or F11 shortcut or the green pci card icon in the toolbar).
- On the left panel, click on "Audio Devices".Now we can see the audio drivers available in the right panel.
- Choose "Jack" in the Driver menu.The default config should give you a pair of audio outputs at a sample rate of 44100.
- Click on the Create button down the window.
Note : In some systems, qsampler crashes if this window is closed or even backgrounded while the Bottom-Right panel is still in view.Easy workaround : click on "Audio devices" or "Midi Devices" on the left panel before leaving or unfocusing the window.
- If you want LS to auto-connect to jack system outputs when you launch your template :
- On the left panel, click on "Audio Jack Device 0" , then on right panel select "Audio Jack 0" from the "Channel" drop-down list.
- Choose an output for the JACK_BINDINGS parameter, like "system:playback 1".
- Select "Audio Jack 1" from the "Channel" drop-down list and assign JACK_BINDINGS parameter value, like system:playback 2"
- Now let's create a midi input also :
- On the left panel, click on "Midi Devices".
- On the right panel, choose "jack" (jack-midi) in the Driver menu.
- Hit the create button.
- If you want LS to auto-connect to jack-keyboard midi output when you launch your template :
- Select the "Midi jack device" port 0" on the left panel.
- On the right panel, for the "JACK_BINDINGS" parameter value, choose "jack-keyboard:midi out".
Note that if jack-midi is not enabled in Qjackctl, you won't find the midi client in the drop-down list.You can check in Qjackctl setup.Midi driver should be set to "seq".A restart of jack and qsampler is needed.
Also, if jack_keyboard or whatever midi controller you defined in here is not started before qsampler starts, you will likely receive an error from qsampler not finding the midi client.In that case, you can still start the midi device and connect it through qjackctl.
- Finally close the window and save your template.
TIP : You can define as much midi ports as midi controllers you use.The same applies to audio outputs, e.g for sending separated instrument outputs for recording in Ardour.
Filtering midi messages before they reach LS
If you get a message : Engine: WARNING, CONFIG_EG_MIN_RELEASE_TIME too big for current audio fragment size & sampling rate! May lead to click sounds if voice stealing chimes in! and eventually a crash after that, then it's time to reconsider latency for your souncard. On a M-audio delta44 everything working at 5,8 ms.