diff --git a/templates/lv2/src/lv2.c b/templates/lv2/src/lv2.c
index a46f40c..8452e39 100644
--- a/templates/lv2/src/lv2.c
+++ b/templates/lv2/src/lv2.c
@@ -254,7 +254,7 @@ static void run(LV2_Handle instance, uint32_t sample_count) {
 	for (uint32_t j = 0; j < DATA_PRODUCT_CONTROL_OUTPUTS_N; j++) {
 		uint32_t k = param_out_index[j];
 		if (i->c[k] != NULL)
-			i->c[k] = plugin_get_parameter(&i->p, k);
+			*i->c[k] = plugin_get_parameter(&i->p, k);
 	}
 #endif
 }
diff --git a/templates/web-make/Makefile b/templates/web-make/Makefile
new file mode 100644
index 0000000..813009e
--- /dev/null
+++ b/templates/web-make/Makefile
@@ -0,0 +1,32 @@
+include vars.mk
+
+CC = clang
+CFLAGS = --target=wasm32 -flto -fvisibility=hidden -Ofast -Wall -Wextra -Wpedantic
+LDFLAGS = \
+	-Wl,--allow-undefined \
+	-Wl,--no-entry \
+	-Wl,--lto-O3 \
+	-Wl,-strip-all \
+	-Wl,--export-table \
+	-Wl,--export=wrapper_new \
+	-Wl,--export=wrapper_free \
+	-Wl,--export=wrapper_get_ins \
+	-Wl,--export=wrapper_get_outs \
+	-Wl,--export=wrapper_get_param_values \
+	-Wl,--export=wrapper_process \
+	-Wl,--export=wrapper_set_parameter \
+	-Wl,-z,stack-size=$$((8*1024*1024)) \
+	-nostdlib
+
+all: build/${BUNDLE_NAME}.wasm
+
+build/${BUNDLE_NAME}.wasm: src/data.h src/memset.h src/plugin.h src/walloc.h src/wrapper.c | build
+	${CC} src/wrapper.c -o $@ ${CFLAGS} ${LDFLAGS} ${CFLAGS_EXTRA} ${LIBS_EXTRA}
+
+build:
+	mkdir -p $@
+
+clean:
+	rm -fr build
+
+.PHONY: all clean
diff --git a/templates/web-make/tibia-index.js b/templates/web-make/tibia-index.js
new file mode 100644
index 0000000..53d79fb
--- /dev/null
+++ b/templates/web-make/tibia-index.js
@@ -0,0 +1,4 @@
+module.exports = function (data, api) {
+	api.copyFile(`Makefile`, `Makefile`);
+	api.generateFileFromTemplateFile(`vars.mk`, `vars.mk`, data);
+};
diff --git a/templates/web-make/vars.mk b/templates/web-make/vars.mk
new file mode 100644
index 0000000..c845be1
--- /dev/null
+++ b/templates/web-make/vars.mk
@@ -0,0 +1,3 @@
+BUNDLE_NAME := {{=it.product.bundleName}}
+CFLAGS_EXTRA := {{=it.make && it.make.cflags ? it.make.cflags : ""}} {{=it.web_make && it.web_make.cflags ? it.web_make.cflags : ""}}
+LIBS_EXTRA := {{=it.make && it.make.libs ? it.make.libs : ""}} {{=it.web_make && it.web_make.libs ? it.web_make.libs : ""}}
diff --git a/templates/web/src/data.h b/templates/web/src/data.h
new file mode 100644
index 0000000..165a6e6
--- /dev/null
+++ b/templates/web/src/data.h
@@ -0,0 +1,26 @@
+#define DATA_PRODUCT_AUDIO_INPUT_CHANNELS_N	{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input").reduce((s, x) => s += x.channels == "mono" ? 1 : 2, 0)}}
+#define DATA_PRODUCT_AUDIO_OUTPUT_CHANNELS_N	{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "output").reduce((s, x) => s += x.channels == "mono" ? 1 : 2, 0)}}
+#define DATA_PRODUCT_MIDI_INPUTS_N		{{=it.product.buses.filter(x => x.type == "midi" && x.direction == "input").length}}
+#define DATA_PRODUCT_MIDI_OUTPUTS_N		{{=it.product.buses.filter(x => x.type == "midi" && x.direction == "output").length}}
+#define DATA_PRODUCT_PARAMETERS_N		{{=it.product.parameters.length}}
+#define DATA_PRODUCT_PARAMETERS_OUTPUT_N	{{=it.product.parameters.filter(x => x.direction == "output").length}}
+
+#if DATA_PRODUCT_PARAMETERS_N > 0
+static struct {
+	char	out;
+	float	def;
+} param_data[DATA_PRODUCT_PARAMETERS_N] = {
+{{~it.product.parameters :p}}
+	{
+		/* .out	= */ {{=p.direction == "output" ? 1 : 0}},
+		/* .def	= */ {{=p.defaultValue.toExponential()}}
+	},
+{{~}}
+};
+#endif
+
+#if DATA_PRODUCT_PARAMETERS_OUTPUT_N > 0
+static size_t param_out_index[DATA_PRODUCT_PARAMETERS_OUTPUT_N] = {
+	{{~it.product.parameters :p:i}}{{?p.direction == "output"}}{{=i}}, {{?}}{{~}}
+};
+#endif
diff --git a/templates/web/src/memset.h b/templates/web/src/memset.h
new file mode 100644
index 0000000..0fb33f2
--- /dev/null
+++ b/templates/web/src/memset.h
@@ -0,0 +1,10 @@
+/*
+ * Copyright (C) 2023 Orastron Srl unipersonale
+ */
+
+void *memset(void *ptr, int value, size_t num) {
+	unsigned char *p = (unsigned char *)ptr;
+	for (size_t i = 0; i < num; i++)
+		p[i] = (unsigned char)value;
+	return ptr;
+}
diff --git a/templates/web/src/walloc.h b/templates/web/src/walloc.h
new file mode 100644
index 0000000..cd5b5a7
--- /dev/null
+++ b/templates/web/src/walloc.h
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2021, 2022, 2024 Orastron Srl unipersonale
+ */
+
+void *malloc(size_t size);
+void *realloc(void *ptr, size_t size);
+void free(void *ptr);
+
+extern unsigned char __heap_base;
+
+typedef struct _header {
+	struct _header *next;
+	struct _header *prev;
+	char free;
+} header;
+
+static char inited = 0;
+
+static size_t get_size(header *h) {
+	char *n = (char *)h->next;
+	return (n ? n : (char *)(__builtin_wasm_memory_size(0) << 16)) - (char *)h - sizeof(header);
+}
+
+static void split_if_possible(header *h, size_t s, size_t size) {
+	if (s <= size + sizeof(header) + sizeof(header))
+		return;
+
+	header *hn = (header *)((char *)h + sizeof(header) + size);
+	hn->prev = h;
+	hn->next = h->next;
+	hn->free = 1;
+	h->next = hn;
+	if (hn->next)
+		hn->next->prev = hn;
+}
+
+void *malloc(size_t size) {
+	if (size == 0)
+		return NULL;
+
+	header *h = (header *)&__heap_base;
+
+	if (!inited) {
+		h->next = NULL;
+		h->prev = NULL;
+		h->free = 1;
+		inited = 1;
+	}
+
+	header *p;
+	for (; h; p = h, h = h->next) {
+		if (!h->free)
+			continue;
+
+		size_t s = get_size(h);
+		if (s < size)
+			continue;
+		
+		split_if_possible(h, s, size);
+
+		h->free = 0;
+		return (char *)h + sizeof(header);
+	}
+
+	int32_t n = __builtin_wasm_memory_grow(0, ((size + sizeof(header) - 1) >> 16) + 1);
+	if (n < 0)
+		return NULL;
+
+	if (p->free)
+		h = p;
+	else {
+		h = (header *)(n << 16);
+		p->next = h;
+		h->prev = p;
+		h->next = NULL;
+	}
+
+	split_if_possible(h, get_size(h), size);
+
+	h->free = 0;
+	return (char *)h + sizeof(header);
+}
+
+void *realloc(void *ptr, size_t size) {
+	if (ptr == NULL)
+		return malloc(size);
+
+	if (size == 0) {
+		free(ptr);
+		return NULL;
+	}
+	
+	header *h = (header *)((char *)ptr - sizeof(header));
+	size_t s = get_size(h);
+	if (s >= size)
+		return ptr;
+
+	void *p = malloc(size);
+	if (p == NULL)
+		return NULL;
+
+	char *src = (char *)ptr;
+	char *dest = (char *)p;
+	for (size_t i = 0; i < s; i++)
+		dest[i] = src[i];
+
+	free(ptr);
+
+	return p;
+}
+
+void free(void *ptr) {
+	header *h = (header *)((char *)ptr - sizeof(header));
+	h->free = 1;
+
+	if (h->next && h->next->free) {
+		h->next = h->next->next;
+		if (h->next)
+			h->next->prev = h;
+	}
+
+	if (h->prev && h->prev->free) {
+		h->prev->next = h->next;
+		if (h->next)
+			h->next->prev = h->prev;
+	}
+}
diff --git a/templates/web/src/wrapper.c b/templates/web/src/wrapper.c
new file mode 100644
index 0000000..42934d3
--- /dev/null
+++ b/templates/web/src/wrapper.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2022-2024 Orastron Srl unipersonale
+ */
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "data.h"
+#include "plugin.h"
+
+#include "memset.h"
+#include "walloc.h"
+
+typedef struct {
+	plugin		p;
+	void *		mem;
+#if DATA_PRODUCT_AUDIO_INPUT_CHANNELS_N > 0
+	float		x_buf[DATA_PRODUCT_AUDIO_INPUT_CHANNELS_N * 128];
+	const float *	x[DATA_PRODUCT_AUDIO_INPUT_CHANNELS_N];
+#endif
+#if DATA_PRODUCT_AUDIO_OUTPUT_CHANNELS_N > 0
+	float		y_buf[DATA_PRODUCT_AUDIO_OUTPUT_CHANNELS_N * 128];
+	float *		y[DATA_PRODUCT_AUDIO_OUTPUT_CHANNELS_N];
+#endif
+#if DATA_PRODUCT_PARAMETERS_OUTPUT_N > 0
+	float		out_params[DATA_PRODUCT_PARAMETERS_OUTPUT_N];
+#endif
+} instance;
+
+instance * wrapper_new(float sample_rate) {
+	instance * i = malloc(sizeof(instance));
+	if (i == NULL)
+		return NULL;
+
+	plugin_init(&i->p);
+
+#if DATA_PRODUCT_PARAMETERS_N > 0
+	for (size_t j = 0; j < DATA_PRODUCT_PARAMETERS_N; j++)
+		if (!param_data[j].out)
+			plugin_set_parameter(&i->p, j, param_data[j].def);
+#endif
+
+	plugin_set_sample_rate(&i->p, sample_rate);
+	size_t req = plugin_mem_req(&i->p);
+	if (req != 0) {
+		i->mem = malloc(req);
+		if (i->mem == NULL) {
+			plugin_fini(&i->p);
+			return NULL;
+		}
+		plugin_mem_set(&i->p, i->mem);
+	} else
+		i->mem = NULL;
+
+	plugin_reset(&i->p);
+
+#if DATA_PRODUCT_AUDIO_INPUT_CHANNELS_N > 0
+	for (size_t j = 0; j < DATA_PRODUCT_AUDIO_INPUT_CHANNELS_N; j++)
+		i->x[j] = i->x_buf + 128 * j;
+#endif
+#if DATA_PRODUCT_AUDIO_OUTPUT_CHANNELS_N > 0
+	for (size_t j = 0; j < DATA_PRODUCT_AUDIO_OUTPUT_CHANNELS_N; j++)
+		i->y[j] = i->y_buf + 128 * j;
+#endif
+
+	return i;
+}
+
+void wrapper_free(instance * i) {
+	plugin_fini(&i->p);
+	if (i->mem)
+		free(i->mem);
+	free(i);
+}
+
+float * wrapper_get_x_buf(instance * i) {
+#if DATA_PRODUCT_AUDIO_INPUT_CHANNELS_N > 0
+	return i->x_buf;
+#else
+	(void *)i;
+	return NULL;
+#endif
+}
+
+float * wrapper_get_y_buf(instance * i) {
+#if DATA_PRODUCT_AUDIO_INPUT_CHANNELS_N > 0
+	return i->y_buf;
+#else
+	(void *)i;
+	return NULL;
+#endif
+}
+
+float * wrapper_get_out_params(instance *i) {
+#if DATA_PRODUCT_PARAMETERS_OUTPUT_N > 0
+	return i->out_params;
+#else
+	(void)i;
+	return NULL;
+#endif
+}
+
+void wrapper_set_parameter(instance *i, int32_t index, float value) {
+	plugin_set_parameter(&i->p, index, value);
+}
+
+void wrapper_process(instance *i, int32_t n_samples) {
+#if DATA_PRODUCT_AUDIO_INPUT_CHANNELS_N > 0
+	const float **x = i->x;
+#else
+	const float **x = NULL;
+#endif
+#if DATA_PRODUCT_AUDIO_OUTPUT_CHANNELS_N > 0
+	float **y = i->y;
+#else
+	float **y = NULL;
+#endif
+
+	plugin_process(&i->p, x, y, n_samples);
+
+#if DATA_PRODUCT_PARAMETERS_OUTPUT_N > 0
+	for (size_t j = 0; j < DATA_PRODUCT_PARAMETERS_OUTPUT_N; j++)
+		i->out_params[j] = plugin_get_parameter(&i->p, param_out_index[j]);
+#endif
+}
diff --git a/templates/web/tibia-index.js b/templates/web/tibia-index.js
new file mode 100644
index 0000000..f9cf682
--- /dev/null
+++ b/templates/web/tibia-index.js
@@ -0,0 +1,9 @@
+var path = require("path");
+var sep = path.sep;
+
+module.exports = function (data, api) {
+	api.copyFile(`src${sep}memset.h`, `src${sep}memset.h`);
+	api.copyFile(`src${sep}walloc.h`, `src${sep}walloc.h`);
+	api.copyFile(`src${sep}wrapper.c`, `src${sep}wrapper.c`);
+	api.generateFileFromTemplateFile(`src${sep}data.h`, `src${sep}data.h`, data);
+};
diff --git a/test/make.json b/test/make.json
deleted file mode 100644
index 6f2f74c..0000000
--- a/test/make.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-	"make": {
-		"libs": "-lm"
-	}
-}
diff --git a/test/plugin.h b/test/plugin.h
index 3dde9f2..95288db 100644
--- a/test/plugin.h
+++ b/test/plugin.h
@@ -1,6 +1,3 @@
-#include <string.h>
-#include <math.h>
-
 typedef struct plugin {
 	float	sample_rate;
 	size_t	delay_line_length;
@@ -14,6 +11,7 @@ typedef struct plugin {
 	size_t	delay_line_cur;
 	float	z1;
 	float	cutoff_k;
+	float	yz1;
 } plugin;
 
 static void plugin_init(plugin *instance) {
@@ -24,7 +22,8 @@ static void plugin_fini(plugin *instance) {
 
 static void plugin_set_sample_rate(plugin *instance, float sample_rate) {
 	instance->sample_rate = sample_rate;
-	instance->delay_line_length = ceilf(sample_rate) + 1;
+	//safe approx instance->delay_line_length = ceilf(sample_rate) + 1;
+	instance->delay_line_length = (size_t)(sample_rate + 1.f) + 1;
 }
 
 static size_t plugin_mem_req(plugin *instance) {
@@ -36,16 +35,19 @@ static void plugin_mem_set(plugin *instance, void *mem) {
 }
 
 static void plugin_reset(plugin *instance) {
-	memset(instance->delay_line, 0, instance->delay_line_length * sizeof(float));
+	for (size_t i = 0; i < instance->delay_line_length; i++)
+		instance->delay_line[i] = 0.f;
 	instance->delay_line_cur = 0;
 	instance->z1 = 0.f;
 	instance->cutoff_k = 1.f;
+	instance->yz1 = 0.f;
 }
 
 static void plugin_set_parameter(plugin *instance, size_t index, float value) {
 	switch (index) {
 	case 0:
-		instance->gain = powf(10.f, 0.05f * value);
+		//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:
 		instance->delay = 0.001f * value;
@@ -60,8 +62,7 @@ static void plugin_set_parameter(plugin *instance, size_t index, float value) {
 }
 
 static float plugin_get_parameter(plugin *instance, size_t index) {
-	// no output parameters
-	return 0.f;
+	return instance->yz1;
 }
 
 static size_t calc_index(size_t cur, size_t delay, size_t len) {
@@ -69,7 +70,8 @@ static size_t calc_index(size_t cur, size_t delay, size_t len) {
 }
 
 static void plugin_process(plugin *instance, const float **inputs, float **outputs, size_t n_samples) {
-	size_t delay = roundf(instance->sample_rate * instance->delay);
+	//approx size_t delay = roundf(instance->sample_rate * instance->delay);
+	size_t delay = (size_t)(instance->sample_rate * instance->delay + 0.5f);
 	const float mA1 = instance->sample_rate / (instance->sample_rate + 6.283185307179586f * instance->cutoff * instance->cutoff_k);
 	for (size_t i = 0; i < n_samples; i++) {
 		instance->delay_line[instance->delay_line_cur] = inputs[0][i];
@@ -80,11 +82,13 @@ static void plugin_process(plugin *instance, const float **inputs, float **outpu
 		const float y = x + mA1 * (instance->z1 - x);
 		instance->z1 = y;
 		outputs[0][i] = instance->bypass ? inputs[0][i] : instance->gain * y;
+		instance->yz1 = outputs[0][i];
 	}
 }
 
 static void plugin_note_on(plugin *instance, size_t index, uint8_t note, float velocity) {
-	instance->cutoff_k = powf(2.f, (1.f / 12.f) * (note - 60));
+	//approx instance->cutoff_k = powf(2.f, (1.f / 12.f) * (note - 60));
+	instance->cutoff_k = note < 64 ? (-0.19558034980097166f * note - 2.361735109225749f) / (note - 75.57552349522389f) : (393.95397927344214f - 7.660826245588588f * note) / (note - 139.0755234952239f);
 }
 
 static void plugin_note_off(plugin *instance, size_t index, uint8_t note, float velocity) {
diff --git a/test/product.json b/test/product.json
index 3bf1fd1..761c0af 100644
--- a/test/product.json
+++ b/test/product.json
@@ -108,6 +108,22 @@
 				"list": true,
 				"unit": "",
 				"map": "linear"
+			},
+			{
+				"name": "yz1",
+				"shortName": "yz1",
+				"direction": "output",
+				"isBypass": false,
+				"isLatency": false,
+				"defaultValue": 0.0,
+				"minimum": -1.0,
+				"maximum": 1.0,
+				"toggled": false,
+				"optional": false,
+				"integer": false,
+				"list": false,
+				"unit": "",
+				"map": "linear"
 			}
 		]
 	}
diff --git a/test/run.sh b/test/run.sh
index ef694f5..c1350e2 100755
--- a/test/run.sh
+++ b/test/run.sh
@@ -2,8 +2,13 @@
 
 dir=`dirname $0`
 $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/make.json,$dir/vst3-make.json $dir/../templates/vst3-make $dir/../out/vst3
+$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/../out/vst3/src
+
 $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/make.json $dir/../templates/lv2-make $dir/../out/lv2
+$dir/../tibia $dir/product.json,$dir/company.json,$dir/lv2.json $dir/../templates/lv2-make $dir/../out/lv2
 cp $dir/plugin.h $dir/../out/lv2/src
+
+$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
+cp $dir/plugin.h $dir/../out/web/src