# LV2 CV Port Extension # Copyright 2011 David Robillard <http://drobilla.net> # # Permission to use, copy, modify, and/or distribute this software for any # purpose with or without fee is hereby granted, provided that the above # copyright notice and this permission notice appear in all copies. # # THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. @prefix cv: <http://lv2plug.in/ns/ext/cv-port#> . @prefix doap: <http://usefulinc.com/ns/doap#> . @prefix foaf: <http://xmlns.com/foaf/0.1/> . @prefix lv2: <http://lv2plug.in/ns/lv2core#> . @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . <http://lv2plug.in/ns/ext/cv-port> a lv2:Specification ; doap:license <http://opensource.org/licenses/isc-license> ; doap:name "LV2 CV Port" ; doap:shortdesc "Control Voltage ports for LV2 plugins." ; doap:maintainer [ a foaf:Person ; foaf:name "David Robillard" ; foaf:homepage <http://drobilla.net/> ; rdfs:seeAlso <http://drobilla.net/drobilla.rdf> ] ; lv2:documentation """ <p>This extension defines Control Voltage (CV) ports, which are audio-rate control ports like those used on classical voltage-controlled synthesizers. These ports serve as control ports like <a href="http://lv2plug.in/ns/lv2core#ControlPort">lv2:ControlPort</a> but can also be used for audio-rate modulation of control signals. This enables many types of processing and synthesis which are not possible with a lower control rate.</p> """ . cv:CVPort a rdfs:Class ; rdfs:label "CV Port" ; rdfs:subClassOf lv2:Port ; lv2:documentation """ <p>Ports of this type have identical semantics to <a href="http://lv2plug.in/ns/lv2core#AudioPort">lv2:AudioPort</a> in terms of buffer format and connection/input/output logistics. However, rather than the buffer representing audio, the buffer represents audio-rate control data. A CVPort SHOULD have the same properties a <a href="http://lv2plug.in/ns/lv2core#ControlPort">lv2:ControlPort</a> typically has to describe appropriate control values (e.g. <a href="http://lv2plug.in/ns/lv2core#minimum">lv2:minimum</a>, <a href="http://lv2plug.in/ns/lv2core#maximum">lv2:maximum</a>, <a href="http://lv2plug.in/ns/lv2core#default">lv2:default</a>)</p> <p>Hosts SHOULD take care to prevent data from a CVPort port from being used as audio except in cases where this is known to be safe.</p> <p>Example:</p> <pre class="turtle-code"> <http://example.org/some-plugin> lv2:port [ a cv:CVPort, lv2:InputPort ; lv2:index 0 ; lv2:minimum -1.0 ; lv2:maximum 1.0 ; lv2:default 0.0 ; lv2:symbol "modulation" ; lv2:name "Modulation" ; ] . </pre> """ .