Add range to parameters so hosts know how to control them.

1 files changed, 22 insertions, 1 deletions

diff --git a/lv2/lv2plug.in/ns/ext/parameters/parameters.ttl b/lv2/lv2plug.in/ns/ext/parameters/parameters.ttl
index 8f05f74..c89ac78 100644
--- a/lv2/lv2plug.in/ns/ext/parameters/parameters.ttl
+++ b/lv2/lv2plug.in/ns/ext/parameters/parameters.ttl
@@ -1,8 +1,10 @@
 @prefix lv2:   <http://lv2plug.in/ns/lv2core#> .
 @prefix param: <http://lv2plug.in/ns/ext/parameters#> .
+@prefix atom:  <http://lv2plug.in/ns/ext/atom#> .
 @prefix pg:    <http://lv2plug.in/ns/ext/port-groups#> .
 @prefix rdf:   <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
 @prefix rdfs:  <http://www.w3.org/2000/01/rdf-schema#> .
+@prefix units: <http://lv2plug.in/ns/extensions/units#> .
 
 <http://lv2plug.in/ns/ext/parameters>
 	a lv2:Specification ;
@@ -24,74 +26,93 @@ A group representing a set of associated controls.
 
 param:amplitude
 	a lv2:Parameter ;
+	rdfs:range atom:Float ;
 	rdfs:label "amplitude" .
 
 param:attack
 	a lv2:Parameter ;
+	rdfs:range atom:Float ;
 	rdfs:label "attack" ;
 	rdfs:comment "The duration of an envelope's attack stage." .
 
 param:cutoffFrequency
 	a lv2:Parameter ;
+	rdfs:range atom:Float ;
 	rdfs:label "cutoff frequency" .
 
 param:decay
 	a lv2:Parameter ;
+	rdfs:range atom:Float ;
 	rdfs:label "decay" ;
 	rdfs:comment "The duration of an envelope's decay stage." .
 
 param:delay
 	a lv2:Parameter ;
+	rdfs:range atom:Float ;
 	rdfs:label "delay" ;
 	rdfs:comment "The duration of an envelope's delay stage." .
 
 param:frequency
 	a lv2:Parameter ;
+	rdfs:range atom:Float ;
 	rdfs:label "frequency" .
 
 param:hold
 	a lv2:Parameter ;
+	rdfs:range atom:Float ;
 	rdfs:label "hold" ;
 	rdfs:comment "The duration of an envelope's hold stage." .
 
 param:pulseWidth
 	a lv2:Parameter ;
+	rdfs:range atom:Float ;
 	rdfs:label "pulse width" ;
 	rdfs:comment "The width of a pulse of a rectangular waveform." .
 
 param:ratio
 	a lv2:Parameter ;
+	rdfs:range atom:Float ;
 	rdfs:label "ratio" ;
 	rdfs:comment "Compression ration." .
 
 param:release
 	a lv2:Parameter ;
+	rdfs:range atom:Float ;
 	rdfs:label "release" ;
 	rdfs:comment "The duration of an envelope's release stage." .
 
 param:resonance
 	a lv2:Parameter ;
+	rdfs:range atom:Float ;
 	rdfs:label "resonance" ;
 	rdfs:comment "The resonance of a filter." .
 
 param:sustain
 	a lv2:Parameter ;
 	rdfs:label "sustain" ;
+	rdfs:range atom:Float ;
 	rdfs:comment "The level (not duration) of an envelope's sustain stage." .
 
 param:threshold
 	a lv2:Parameter ;
+	rdfs:range atom:Float ;
 	rdfs:label "threshold" ;
 	rdfs:comment "Compression threshold." .
 
 param:waveform
 	a lv2:Parameter ;
+	rdfs:range atom:Float ;
 	rdfs:label "waveform" .
 
 param:gain
 	a lv2:Parameter ;
+	rdfs:range atom:Float ;
+	lv2:default 0.0 ;
+	lv2:minimum -20.0 ;
+	lv2:maximum 20.0 ;
+	units:unit units:db ;
 	rdfs:label "gain" ;
-	rdfs:comment "A factor which controls an output level." .
+	rdfs:comment "Gain in decibels." .
 
 param:wetDryRatio
 	a lv2:Parameter ;