diff --git a/notes b/notes
index a9b6511..9954121 100644
--- a/notes
+++ b/notes
@@ -4,22 +4,22 @@ company {
 		LV2: manifest.ttl doap:maintainer foaf:name
 		web: not used
 		cmd: not used
-		ios: not used
 		android: not used
+		ios: not used
 	url:
 		VST3: PFactoryInfo.url
 		LV2: manifest.ttl doap:maintainer rdfs:seeAlso
 		web: not used
 		cmd: not used
-		ios: not used
 		android: not used
+		ios: not used
 	email:
 		VST3: PFactoryInfo.email
 		LV2: manifest.ttl doap:maintainer foaf:mbox
 		web: not used
 		cmd: not used
-		ios: not used
 		android: not used
+		ios: not used
 }
 
 product {
@@ -28,29 +28,29 @@ product {
 		LV2: manifest.ttl plugin doap:name
 		web: web-demo <title> and <h1>
 		cmd: not used
-		ios: index.html <title>
 		android: index.html <title>, AndroidManifest.xml <application> <activity> android:label
+		ios: index.html <title>
 	version:
 		VST3: PClassInfo{2,W}.version (first 3 numbers)
 		LV2: not used
 		web: not used
 		cmd: not used
-		ios: not used
 		android: not used
+		ios: not used
 	buildVersion:
 		VST3: PClassInfo{2,W}.version (last number)
 		LV2: not used
 		web: not used
 		cmd: not used
-		ios: not used
 		android: not used
+		ios: not used
 	bundleName:
 		VST3: plugin folder name, plugin .dll name, Info.plist
 		LV2: plugin folder name, plugin .dll name, manifest.ttl plugin lv2:binary
 		web: registerProcessor(), output file names
 		cmd: executable file name
-		ios: project.yml name/target, vars.mk BUNDLE_NAME
 		android: .so/.apk filenames
+		ios: xcodegen name and target name, xcodeproj filename
 	buses: [
 		{
 			name:
@@ -59,80 +59,80 @@ product {
 				LV2: manifest.ttl lv2:port lv2:name
 				web: not used
 				cmd: not used
-				ios: not used
 				android: not used
+				ios: not used
 			shortName:
 				bus short name string, required
 				VST3: not used
 				LV2: manifest.ttl lv2:port lv2:shortName
 				web: not used
 				cmd: not used
-				ios: not used
 				android: not used
+				ios: not used
 			id:
 				bus unique id string, required
 				VST3; not used
 				LV2: manifest.ttl lv2:port lv2:symbol (resulting ports can have _l or _r appended)
 				web: not used
 				cmd: not used
-				ios: not used
 				android: not used
+				ios: not used
 			direction:
 				"input" or "output", required
 				VST3: BusInfo flags - lots of implications
 				LV2: manifest.ttl lv2:port a - lots of implications
 				web: AudioWorkletNode.{numberOfInputs,numberOfOutputs,outputChannelCount} - lots of implications
 				cmd: lots of places
-				ios: data.h, index.html
 				android: lots of places
+				ios: data.h, index.html
 			type:
 				"audio" or "midi", required
 				VST3: BusInfo mediaType, ParameterInfo (channel pressure, pitch bend params) - lots of implications
 				LV2: lots of implications everywhere
 				web: AudioWorkletNode.{numberOfInputs,numberOfOutputs,outputChannelCount} - lots of implications
 				cmd: lots of places
-				ios: data.h, index.html
 				android: lots of places
+				ios: data.h, index.html
 			channels:
 				"mono" or "stereo", audio type only, required
 				VST3: BusInfo channelCount, plugin get/set bus arrangements
 				LV2: manifest.ttl lv2:port - lots of implications
 				web: AudioWorkletNode.outputChannelCount - lots of implications
 				cmd: lots of places
-				ios: data.h
 				android: lots of places
+				ios: data.h
 			sidechain:
 				bus is not part of main audio path (sidechain)? boolean, default false
 				VST3: BusInfo busType
 				LV2: manifest.ttl lv2:port lv2:portProperty lv2:isSideChain
 				web: web-demo choice of audio I/O buses
 				cmd: choice of audio I/O buses
-				ios: choice of audio I/O buses
 				android: choice of audio I/O buses
+				ios: choice of audio I/O buses
 			cv:
 				bus is control voltage audio-rate? boolean, audio type only, default false
 				VST3: BusInfo flags
 				LV2: manifest.ttl lv2:port a lv2:CVPort
 				web: web-demo choice of audio I/O buses
 				cmd: choice of audio I/O buses
-				ios: choice of audio I/O buses
 				android: choice of audio I/O buses
+				ios: choice of audio I/O buses
 			control:
 				bus is the "primary control channel" (send cmds, receive responses)? boolean, midi type only, default false
 				VST3: not used
 				LV2: manifest.ttl lv2:port lv2:designation lv2:control
 				web: not used
 				cmd: not used
-				ios: not used
 				android: not used
+				ios: not used
 			optional:
 				bus is optionally connected? boolean, default false
 				VST3: BusInfo flags, plugin initialize, activate bus, set active
 				LV2: manifest.ttl lv2:port lv2:portProperty lv2:connectionOptional
 				web: not used
 				cmd: whether to pass NULLs if not chosen audio I/O buses
-				ios: whether to pass NULLs if not chosen audio I/O buses
 				android: whether to pass NULLs if not chosen audio I/O buses
+				ios: whether to pass NULLs if not chosen audio I/O buses
 		}
 	]
 	parameters: [
@@ -143,40 +143,40 @@ product {
 				LV2: manifest.ttl lv2:port lv2:name
 				web: AudioWorkletProcessor.parameterDescriptors, web-demo <label>
 				cmd: not used
-				ios: index.html
 				android: index.html <label>
+				ios: index.html <label>
 			shortName:
 				parameter short name string, required
 				VST3: ParameterInfo shortTitle
 				LV2: manifest.ttl lv2:port lv2:shortName
 				web: not used
 				cmd: not used
-				ios: not used
 				android: not used
+				ios: not used
 			id:
 				parameter unique id string, required
 				VST3; not used
 				LV2: manifest.ttl lv2:port lv2:symbol (bypass ports used "enabled")
 				web: not used
 				cmd: command line parameter name etc.
-				ios: not used
 				android: not used
+				ios: not used
 			direction:
 				"input" or "output", required
 				VST3: ParameterInfo flags - lots of implications
 				LV2: manifest.ttl lv2:port a - lots of implications
 				web: AudioWorkletProcessor.parameterDescriptors, web-demo <range> readonly/input listener - lots of implications
 				cmd: lots of places
-				ios: data.h, index.html
 				android: lots of places
+				ios: data.h, index.html
 			isBypass:
 				parameter is bypass/enabled? boolean - lots of implications, default false
 				VST3: ParameterInfo, controller get/set parameter/state
 				LV2: manifest.ttl lv2:port, run() (set parameter)
 				web: AudoWorkletProcessor.process(), web-demo <range> min/max/step
 				cmd: set parameter
-				ios: native.mm set parameter, index.html <range> min/max/step
 				android: JNI set parameter, index.html <range> min/max/step
+				ios: native set parameter, index.html <range> min/max/step
 			isLatency:
 				parameter is latency output? boolean - lots of implications, default false
 				VST3: TBD
@@ -191,56 +191,56 @@ product {
 				LV2: data.h, lv2.c
 				web: processor.js
 				cmd: TODO
-				ios: data.h native.mm
 				android: data.h jni.cpp
+				ios: data.h native.mm
 			defaultValue:
 				default value, number, mapped, required for non-bypass
 				VST3: ParameterInfo defaultNormalizedValue, controller initialize
 				LV2: manifest.ttl lv2:port lv2:default, activate() (set initial parameter)
 				web: AudioWorkletProcessor.parameterDescriptors, processor_new(), web-demo initial <range> value and value <span> innerText
 				cmd: default parameter value
-				ios: native.mm set parameter initial value, index.html initial <range> value
 				android: JNI set parameter initial value, index.html initial <range> value
+				ios: native set parameter initial value, index.html initial <range> value
 			minimum:
 				minimum value, number, mapped, required for non-bypass
 				VST3: ParameterInfo stepCount, defaultNormalizedValue, controller get/set parameter (value clamped)
 				LV2: manifest.ttl lv2:port lv2:minimum, run() (set parameter, value clamped)
 				web: AudioWorkletProcessor.parameterDescriptors, AudioWorkletProcessor.process() (value clamped), web-demo <range> mapping
 				cmd: set parameter (value clamped)
-				ios: native.mm set parameter (value clamped), index.html <range> mapping
 				android: JNI set parameter (value clamped), index.html <range> mapping
+				ios: native set parameter (value clamped), index.html <range> mapping
 			maximum:
 				maximum value, number, mapped, required for non-bypass
 				VST3: ParameterInfo stepCount, defaultNormalizedValue, controller get/set parameter (value clamped)
 				LV2: manifest.ttl lv2:port lv2:maximum, run() (set parameter, value clamped)
 				web: AudioWorkletProcessor.parameterDescriptors, AudioWorkletProcessor.process() (value clamped), web-demo <range> mapping
 				cmd: set parameter (value clamped)
-				ios: native.mm set parameter (value clamped), index.html <range> mapping
 				android: JNI set parameter (value clamped), index.html <range> mapping
+				ios: native set parameter (value clamped), index.html <range> mapping
 			toggled:
 				parameter is on/off? boolean, default false
 				VST3: ParameterInfo stepCount, controller set parameter/state
 				LV2: manifest.ttl lv2:port lv2:portProperty lv2:toggled, run() (set parameter)
 				web: AudoWorkletProcessor.process(), web-demo <range> min/max/step
 				cmd: set parameter
-				ios: native.mm set parameter, index.html <range> min/max/step
 				android: JNI set parameter, index.html <range> min/max/step
+				ios: native set parameter, index.html <range> min/max/step
 			optional:
 				parameter is optionally connected? boolean, default false
 				VST3: not used
 				LV2: manifest.ttl lv2:port lv2:portProperty lv2:connectionOptional
 				web: not used
 				cmd: not used
-				ios: not used
 				android: not used
+				ios: not used
 			integer:
 				parameter values are integers? boolean, default false
 				VST3: ParameterInfo stepCount, controller set parameter/state
 				LV2: manifest.ttl lv2:port lv2:portProperty lv2:integer, run() (set parameter)
 				web: AudoWorkletProcessor.process(), web-demo <range> step
 				cmd: set parameter
-				ios: native.mm set parameter, index.html <range> step
 				android: JNI set parameter, index.html <range> step
+				ios: native set parameter, index.html <range> step
 			scalePoints:
 				{ "label1": value1, "label2", value2, ... }
 				labeled values, default none
@@ -248,32 +248,32 @@ product {
 				LV2: manifest.ttl lv2:port lv2:scalePoint
 				web: not (yet) used
 				cmd: not (yet) used
-				ios: not (yet) used
 				android: not (yet) used
+				ios: not (yet) used
 			list:
 				parameter is a list (using scalePoints values)? default false
 				VST3: TBD (+approx to closest?)
 				LV2: manifest.ttl lv2:port lv2:enumeration - run() (set parameter) TBD?
 				web: TBD (approx to closest? dropdown? both?)
 				cmd: not (yet) used
-				ios: not (yet) used
 				android: not (yet) used
+				ios: not (yet) used
 			unit:
 				unit of measure (from predefined list, see tibia-index.js), default ""
 				VST3: ParameterInfo units
 				LV2: manifest.ttl lv2:port units:unit
 				web: web-demo value <span> innerText
 				cmd: not (yet) used
-				ios: not (yet) used
 				android: not (yet) used
+				ios: not (yet) used
 			map:
 				"linear" vs "logarithmic"
 				VST3: many places (requires libm)
 				LV2: manifest.ttl lv2:port lv2:portProperty pprops:logarithmic
 				web: web-demo <range> values
 				cmd: not used
-				ios: index.html <range> values
 				android: index.html <range> values
+				ios: index.html <range> values
 		}
 	]
 }
diff --git a/templates/android/src/jni.cpp b/templates/android/src/jni.cpp
index 96a3725..b373fe7 100644
--- a/templates/android/src/jni.cpp
+++ b/templates/android/src/jni.cpp
@@ -21,9 +21,8 @@
 #include <stdlib.h>
 #include <stdint.h>
 
-#include "callbacks.h"
-
 #include "data.h"
+#include "plugin_api.h"
 #include "plugin.h"
 
 #include <string.h>
diff --git a/templates/cmd/src/main.c b/templates/cmd/src/main.c
index 747c220..6f598f2 100644
--- a/templates/cmd/src/main.c
+++ b/templates/cmd/src/main.c
@@ -21,9 +21,8 @@
 #include <stdlib.h>
 #include <stdint.h>
 
-#include "callbacks.h"
-
 #include "data.h"
+#include "plugin_api.h"
 #include "plugin.h"
 
 #include <stdio.h>
diff --git a/templates/common/src/plugin_api.h b/templates/common/src/plugin_api.h
new file mode 100644
index 0000000..dcd696b
--- /dev/null
+++ b/templates/common/src/plugin_api.h
@@ -0,0 +1,49 @@
+/*
+ * Tibia
+ *
+ * Copyright (C) 2024 Orastron Srl unipersonale
+ *
+ * Tibia is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License.
+ *
+ * Tibia is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Tibia.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * File author: Stefano D'Angelo
+ */
+
+#ifndef PLUGIN_API_H
+#define PLUGIN_API_H
+
+typedef struct {
+	void *		handle;
+	const char *	format;
+	const char * (*get_bindir)(void *handle);
+	const char * (*get_datadir)(void *handle);
+} plugin_callbacks;
+
+typedef struct {
+	void *		handle;
+	const char *	format;
+	const char * (*get_bindir)(void *handle);
+	const char * (*get_datadir)(void *handle);
+	void (*set_parameter_begin)(void *handle, size_t index);
+	void (*set_parameter)(void *handle, size_t index, float value);
+	void (*set_parameter_end)(void *handle, size_t index);
+} plugin_ui_callbacks;
+
+{{?it.product.parameters.length > 0}}
+enum {
+	{{~it.product.parameters :p}}
+	plugin_parameter_{{=p.id}},
+	{{~}}
+};
+{{?}}
+
+#endif
diff --git a/templates/common/tibia-index.js b/templates/common/tibia-index.js
new file mode 100644
index 0000000..1dfd137
--- /dev/null
+++ b/templates/common/tibia-index.js
@@ -0,0 +1,26 @@
+/*
+ * Tibia
+ *
+ * Copyright (C) 2024 Orastron Srl unipersonale
+ *
+ * Tibia is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License.
+ *
+ * Tibia is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Tibia.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * File author: Stefano D'Angelo
+ */
+
+var path = require("path");
+var sep = path.sep;
+
+module.exports = function (data, api) {
+	api.generateFileFromTemplateFile(`src${sep}plugin_api.h`, `src${sep}plugin_api.h`, data);
+};
diff --git a/templates/daisy-seed/src/main.cpp b/templates/daisy-seed/src/main.cpp
index 7403e0b..43253b3 100644
--- a/templates/daisy-seed/src/main.cpp
+++ b/templates/daisy-seed/src/main.cpp
@@ -21,9 +21,8 @@
 #include <stdlib.h>
 #include <stdint.h>
 
-#include "callbacks.h"
-
 #include "data.h"
+#include "plugin_api.h"
 #include "plugin.h"
 
 #include <string.h>
diff --git a/templates/ios/src/native.mm b/templates/ios/src/native.mm
index e48446e..dfee0c1 100644
--- a/templates/ios/src/native.mm
+++ b/templates/ios/src/native.mm
@@ -21,9 +21,8 @@
 #include <stdlib.h>
 #include <stdint.h>
 
-#include "callbacks.h"
-
 #include "data.h"
+#include "plugin_api.h"
 #include "plugin.h"
 #if PARAMETERS_N > 0
 # include <algorithm>
diff --git a/templates/lv2/src/lv2.c b/templates/lv2/src/lv2.c
index 7d38975..8827444 100644
--- a/templates/lv2/src/lv2.c
+++ b/templates/lv2/src/lv2.c
@@ -21,9 +21,8 @@
 #include <stdlib.h>
 #include <stdint.h>
 
-#include "callbacks.h"
-
 #include "data.h"
+#include "plugin_api.h"
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wunused-function"
 #include "plugin.h"
diff --git a/templates/vst3/src/vst3.c b/templates/vst3/src/vst3.c
index d48cbe3..7d3fdb9 100644
--- a/templates/vst3/src/vst3.c
+++ b/templates/vst3/src/vst3.c
@@ -21,14 +21,13 @@
 #include <stdlib.h>
 #include <stdint.h>
 
-#include "callbacks.h"
-
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wpedantic"
 #include "vst3_c_api.h"
 #pragma GCC diagnostic pop
 
 #include "data.h"
+#include "plugin_api.h"
 #include "plugin.h"
 #ifdef DATA_UI
 # include "plugin_ui.h"
diff --git a/templates/web/src/processor.c b/templates/web/src/processor.c
index 72619c4..7b70890 100644
--- a/templates/web/src/processor.c
+++ b/templates/web/src/processor.c
@@ -21,9 +21,8 @@
 #include <stddef.h>
 #include <stdint.h>
 
-#include "callbacks.h"
-
 #include "data.h"
+#include "plugin_api.h"
 #include "plugin.h"
 
 #include "string.h"
diff --git a/test/plugin.h b/test/plugin.h
index 4bbf97e..1910a51 100644
--- a/test/plugin.h
+++ b/test/plugin.h
@@ -68,17 +68,17 @@ static void plugin_reset(plugin *instance) {
 
 static void plugin_set_parameter(plugin *instance, size_t index, float value) {
 	switch (index) {
-	case 0:
+	case plugin_parameter_gain:
 		//approx instance->gain = powf(10.f, 0.05f * value);
 		instance->gain = ((2.6039890429412597e-4f * value + 0.032131027163547855f) * value + 1.f) / ((0.0012705124328080768f * value - 0.0666763481312185f) * value + 1.f);
 		break;
-	case 1:
+	case plugin_parameter_delay:
 		instance->delay = 0.001f * value;
 		break;
-	case 2:
+	case plugin_parameter_cutoff:
 		instance->cutoff = value;
 		break;
-	case 3:
+	case plugin_parameter_bypass:
 		instance->bypass = value >= 0.5f;
 		break;
 	}
diff --git a/test/run.sh b/test/run.sh
index 50f3173..4b3eeb8 100755
--- a/test/run.sh
+++ b/test/run.sh
@@ -1,32 +1,39 @@
 #!/bin/sh
 
 dir=`dirname $0`
+$dir/../tibia $dir/product.json,$dir/company.json $dir/../templates/common $dir/../out/vst3
 $dir/../tibia $dir/product.json,$dir/company.json,$dir/vst3.json $dir/../templates/vst3 $dir/../out/vst3
 $dir/../tibia $dir/product.json,$dir/company.json,$dir/vst3.json,$dir/vst3-make.json $dir/../templates/vst3-make $dir/../out/vst3
 cp $dir/plugin.h $dir/plugin_ui.h $dir/../out/vst3/src
 
+$dir/../tibia $dir/product.json,$dir/company.json $dir/../templates/common $dir/../out/lv2
 $dir/../tibia $dir/product.json,$dir/company.json,$dir/lv2.json $dir/../templates/lv2 $dir/../out/lv2
 $dir/../tibia $dir/product.json,$dir/company.json,$dir/lv2.json,$dir/lv2-make.json $dir/../templates/lv2-make $dir/../out/lv2
 cp $dir/plugin.h $dir/plugin_ui.h $dir/../out/lv2/src
 
+$dir/../tibia $dir/product.json,$dir/company.json $dir/../templates/common $dir/../out/web
 $dir/../tibia $dir/product.json,$dir/company.json $dir/../templates/web $dir/../out/web
 $dir/../tibia $dir/product.json,$dir/company.json $dir/../templates/web-make $dir/../out/web
 $dir/../tibia $dir/product.json,$dir/company.json $dir/../templates/web-demo $dir/../out/web
 cp $dir/plugin.h $dir/../out/web/src
 
+$dir/../tibia $dir/product.json,$dir/company.json $dir/../templates/common $dir/../out/android
 $dir/../tibia $dir/product.json,$dir/company.json,$dir/android.json $dir/../templates/android $dir/../out/android
 $dir/../tibia $dir/product.json,$dir/company.json,$dir/android.json,$dir/android-make.json $dir/../templates/android-make $dir/../out/android
 cp $dir/keystore.jks $dir/../out/android
 cp $dir/plugin.h $dir/../out/android/src
 
+$dir/../tibia $dir/product.json,$dir/company.json $dir/../templates/common $dir/../out/ios
 $dir/../tibia $dir/product.json,$dir/company.json,$dir/ios.json $dir/../templates/ios $dir/../out/ios
 $dir/../tibia $dir/product.json,$dir/company.json,$dir/ios.json,$dir/ios-make.json $dir/../templates/ios-make $dir/../out/ios
 cp $dir/plugin.h $dir/../out/ios/src
 
+$dir/../tibia $dir/product.json,$dir/company.json $dir/../templates/common $dir/../out/cmd
 $dir/../tibia $dir/product.json,$dir/company.json $dir/../templates/cmd $dir/../out/cmd
 $dir/../tibia $dir/product.json,$dir/company.json,$dir/cmd-make.json $dir/../templates/cmd-make $dir/../out/cmd
 cp $dir/plugin.h $dir/../out/cmd/src
 
+$dir/../tibia $dir/product.json,$dir/company.json $dir/../templates/common $dir/../out/daisy-seed
 $dir/../tibia $dir/product.json,$dir/company.json,$dir/daisy-seed.json $dir/../templates/daisy-seed $dir/../out/daisy-seed
 $dir/../tibia $dir/product.json,$dir/company.json,$dir/daisy-seed.json,$dir/daisy-seed-make.json $dir/../templates/daisy-seed-make $dir/../out/daisy-seed
 cp $dir/plugin.h $dir/../out/daisy-seed/src