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PROGRAM:

NAME


composite_sampler - audio sampler/synth plugin (LV2)

DESCRIPTION


The Composite sampler is an audio plugin (LV2) that provides a simple sampling engine. It
is identified by the URI “http://gabe.is-a-geek.org/composite/plugins/sampler/1

PORTS


The sampler includes the following ports:

┌───────┬───────────┬─────────────┬────────┬─────────────────┐
NameLV2 PortTypeFlowDescription
├───────┼───────────┼─────────────┼────────┼─────────────────┤
│Left │ out_left │ AudioPort │ Output │ Left stereo │
│ │ │ │ │ channel output │
├───────┼───────────┼─────────────┼────────┼─────────────────┤
│Right │ out_right │ AudioPort │ Output │ Right stereo │
│ │ │ │ │ channel output │
├───────┼───────────┼─────────────┼────────┼─────────────────┤
│MIDI │ midi │ EventPort │ Input │ Main MIDI Input │
├───────┼───────────┼─────────────┼────────┼─────────────────┤
│Volume │ volume │ ControlPort │ Input │ Master volume │
│ │ │ │ │ [0.0-1.0] │
└───────┴───────────┴─────────────┴────────┴─────────────────┘

CONTROLLING THE SAMPLER


The primary way to control the sampler is over MIDI. See composite_midi(7) for complete
documentation on the MIDI implementation.

DRUMKITS


The drumkits for Composite are the same as for Hydrogen. To reuse your Hydrogen drumkits,
copy or symlink them to $HOME/.composite/data/drumkits/. You can create and edit drumkits
with composite-gui (or Hydrogen).

PRESETS


The sampler responds to MIDI Program Change events. Based on the event that it receives,
it will load up another file (e.g. a drumkit). This is how you can select the drumkit that
you wish to use.

The presets are defined in a file $HOME/.composite/data/presets/default.xml. For the
sampler plugin, you can override this by using default-presets.xml, but at the current
time there is no need to. When you first load the sampler, it will check for this file. If
it doesn´t exist, it will create one based on all your user drumkits.

The presets file is a simple XML file that allows you to define MIDI banks, and assign
different resources for each program change. An example file is as follows:

<?xml version="1.0"?>
<T:tritium xmlns:T="http://gabe.is-a-geek.org/tritium/xml/1/">
<T:presets>
<T:bank coarse="0" fine="0">
<T:program>
<T:midi_number>0</T:midi_number>
<T:resource>tritium:drumkits/GMkit</T:resource>
</T:program>
<T:program>
<T:midi_number>1</T:midi_number>
<T:resource>tritium:drumkits/TR808EmulationKit</T:resource>
</T:program>
</T:bank>
</T:presets>
</T:tritium>

You can define several <bank> elements for the MIDI banks. The attributes coarse and fine
correspond to the MIDI CC´s 0 and 32. Each <program> section is a preset. The
<midi_number> corresponds to the number in the PC message.

The <resource> element holds a URI/URL to the thing you want loaded. This will typically
be a drum kit, but can be any kind of file that Composite supports (like a .h2song,
.h2pattern, etc.). The sampler will do the Right Thing. (For example, when loading an
.h2song, the drumkit stored in the song will be loaded.) The URL´s supported are file://,
tritium:, and file names.

The tritium: scheme is designed to create portable URL´s to things like drum kits. For
example, the URL “tritium:drumkits/GMkit” will load the drumkit “GMkit”, whether it´s
installed in the user directory ($HOME/.composite/data/drumkits/GMkit/drumkit.xml) or in
the system directory (/usr/share/composite/data/drumkits/GMkit/drumkit.xml).

Note
The XML namespace declaration “http://gabe.is-a-geek.org/tritium/xml/1/” is not
optional.

LV2 EXTENSIONS


This plugin uses the following extensions, and they must be supported by any program
(host) that wishes to use this plugin. If the host does not support them, the plugin will
fail to load.

· Events <http://lv2plug.in/ns/ext/event#>

· Midi Events <http://lv2plug.in/ns/ext/midi#MidiEvent>

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