diff --git a/GdpdExample/Main.tscn b/GdpdExample/Main.tscn
index 3889266..f22ef64 100644
--- a/GdpdExample/Main.tscn
+++ b/GdpdExample/Main.tscn
@@ -15,53 +15,6 @@ collision_mask = 0
 physics_material_override = SubResource( 3 )
 gravity_scale = 0.0
 script = ExtResource( 1 )
-patch = "#N canvas 574 271 456 518 12;
-#X obj 361 21 loadbang;
-#X msg 361 51 \\; pd dsp 1;
-#X floatatom 21 198 5 0 0 0 - - - 0;
-#X obj 21 22 r fromGodot\\$0;
-#X obj 21 46 list trim;
-#X obj 199 467 dac~ 1 2;
-#X obj 199 407 *~;
-#X obj 189 230 line~;
-#X msg 189 206 \\$1 100;
-#X obj 189 127 unpack f f;
-#X floatatom 189 177 5 0 0 0 - - - 0;
-#X obj 21 256 noise~;
-#X obj 21 286 bp~ 500 1000;
-#X obj 21 70 route freq gain panvol;
-#X obj 21 316 *~;
-#X msg 296 338 \\$1 100;
-#X floatatom 296 159 5 0 0 0 - - - 0;
-#X obj 199 437 earplug~ 0 0;
-#X obj 296 362 line;
-#X obj 122 158 != 0;
-#X obj 122 206 switch~;
-#X obj 122 182 tgl 19 0 empty empty empty 0 -10 0 12 #fcfcfc #000000 #000000 0 1;
-#X connect 2 0 12 1;
-#X connect 3 0 4 0;
-#X connect 4 0 13 0;
-#X connect 6 0 17 0;
-#X connect 7 0 6 1;
-#X connect 8 0 7 0;
-#X connect 9 0 10 0;
-#X connect 9 1 16 0;
-#X connect 10 0 8 0;
-#X connect 10 0 19 0;
-#X connect 11 0 12 0;
-#X connect 12 0 14 0;
-#X connect 13 0 2 0;
-#X connect 13 1 14 1;
-#X connect 13 2 9 0;
-#X connect 14 0 6 0;
-#X connect 15 0 18 0;
-#X connect 16 0 15 0;
-#X connect 17 0 5 0;
-#X connect 17 1 5 1;
-#X connect 18 0 17 1;
-#X connect 19 0 21 0;
-#X connect 21 0 20 0;
-"
 
 [node name="CollisionShape" type="CollisionShape" parent="."]
 shape = SubResource( 1 )
diff --git a/GdpdExample/main-earplug.pd b/GdpdExample/main-earplug.pd
new file mode 100644
index 0000000..df864f6
--- /dev/null
+++ b/GdpdExample/main-earplug.pd
@@ -0,0 +1,55 @@
+#N canvas 108 222 456 518 12;
+#X obj 361 21 loadbang;
+#X msg 361 51 \; pd dsp 1;
+#X floatatom 21 198 5 0 0 0 - - - 0;
+#X obj 21 22 r fromGodot\$0;
+#X obj 21 46 list trim;
+#X obj 199 467 dac~ 1 2;
+#X obj 199 407 *~;
+#X obj 189 264 line~;
+#X msg 189 240 \$1 100;
+#X obj 189 127 unpack f f;
+#X floatatom 189 177 5 0 0 0 - - - 0;
+#X obj 21 256 noise~;
+#X obj 21 286 bp~ 500 1000;
+#X obj 21 70 route freq gain panvol;
+#X obj 21 316 *~;
+#X msg 296 338 \$1 100;
+#X floatatom 296 159 5 0 0 0 - - - 0;
+#X obj 199 437 earplug~ 0 0;
+#X obj 296 362 line;
+#X obj 132 310 switch~;
+#X obj 132 286 tgl 19 0 empty empty empty 0 -10 0 12 #fcfcfc #000000 #000000 0 1;
+#X obj 132 262 change;
+#X text 89 155 switch on/off before 0 to stop startup pops, f 12;
+#X obj 189 216 max 0;
+#X obj 132 238 > -0.3;
+#X obj 296 248 expr 360-$f1;
+#X obj 296 182 expr $f1*180/3.141592;
+#X connect 2 0 12 1;
+#X connect 3 0 4 0;
+#X connect 4 0 13 0;
+#X connect 6 0 17 0;
+#X connect 7 0 6 1;
+#X connect 8 0 7 0;
+#X connect 9 0 10 0;
+#X connect 9 1 16 0;
+#X connect 10 0 23 0;
+#X connect 10 0 24 0;
+#X connect 11 0 12 0;
+#X connect 12 0 14 0;
+#X connect 13 0 2 0;
+#X connect 13 1 14 1;
+#X connect 13 2 9 0;
+#X connect 14 0 6 0;
+#X connect 15 0 18 0;
+#X connect 16 0 26 0;
+#X connect 17 0 5 0;
+#X connect 17 1 5 1;
+#X connect 18 0 17 1;
+#X connect 20 0 19 0;
+#X connect 21 0 20 0;
+#X connect 23 0 8 0;
+#X connect 24 0 21 0;
+#X connect 25 0 15 0;
+#X connect 26 0 25 0;
diff --git a/GdpdExample/main.gd b/GdpdExample/main.gd
index 4a61b26..e687d16 100644
--- a/GdpdExample/main.gd
+++ b/GdpdExample/main.gd
@@ -1,10 +1,13 @@
 extends RigidBody
 
-export (String, MULTILINE) var patch = ""
 export (float, 0, 100) var audible_range_max = 10.0
+export (float, 1, 12) var preset = 1
+
+export (bool) var use_embeded_patch = false
+export (String, MULTILINE) var patch = ""
 
-var _use_earplug = false
 var _my_patch = "res://main.pd"
+#var _my_patch = "res://main-earplug.pd"
 var _my_id = 0
 
 func set_size(size):
@@ -24,13 +27,30 @@ func set_gain(gain):
 	Global._gdpd.add_float(gain)
 	Global._gdpd.finish_list("fromGodot" + String(_my_id))
 
+func set_param(param):
+	Global._gdpd.start_message(param.size()+1)
+	Global._gdpd.add_symbol("param")
+	for i in range(param.size()):
+		Global._gdpd.add_float(param[i])
+	Global._gdpd.finish_list("fromGodot" + String(_my_id))
+
+func set_preset(prs):
+	preset = prs
+	Global._gdpd.start_message(2)
+	Global._gdpd.add_symbol("preset")
+	Global._gdpd.add_float(prs)
+	Global._gdpd.finish_list("fromGodot" + String(_my_id))
+
 func set_color(color):
 	$MeshInstance.material_override = SpatialMaterial.new()
 	$MeshInstance.material_override.albedo_color = color
 
 func _ready():
 	# save patch (for export)
-#	_save_patch()
+	if use_embeded_patch:
+		assert(_my_patch.substr(0, 7) == "user://", "use userpath with embeded_patch enabled !")
+		assert(patch != "", "patch is empty?")
+		_save_patch()
 
 	# load patch
 	_my_id = Global.load_patch(ProjectSettings.globalize_path(_my_patch))
@@ -38,6 +58,9 @@ func _ready():
 	# listen 'player_transform_updated' event
 	Events.connect("player_transform_updated", self, "_on_Events_player_transform_updated")
 
+	# send 'preset'
+	set_preset(preset)
+
 func _on_Events_player_transform_updated(playerpos, playerheading):
 	var mypos = get_global_translation()
 	var mypos2d = Vector2(mypos.x, mypos.z)
@@ -46,16 +69,11 @@ func _on_Events_player_transform_updated(playerpos, playerheading):
 	var distance = mypos.distance_to(playerpos)
 	# calculate angle
 	var angle = fmod(fmod(playerpos2d.angle_to_point(mypos2d) + playerheading - PI/2, PI*2) + PI*2, PI*2)
-#	if angle > PI:
-#		angle = angle - PI*2
-	# radians to degrees
-#	if angle < 0:
-#		angle = angle + PI*2
-	angle = rad2deg(angle)
+	if angle > PI:
+		angle = angle - PI*2
 	# (check)
 #	print(str(_my_id) +" : ("+ str(distance) +","+ str(angle) +")")
 	# calculate gain
-#	var gain = max(1 - distance/audible_range_max, 0)
 	var gain = 1 - distance/audible_range_max
 	# send to the patch
 	Global._gdpd.start_message(3)
diff --git a/GdpdExample/main.pd b/GdpdExample/main.pd
index ccbb2eb..9d95dfc 100644
--- a/GdpdExample/main.pd
+++ b/GdpdExample/main.pd
@@ -1,4 +1,4 @@
-#N canvas 574 271 456 518 12;
+#N canvas 126 281 456 518 12;
 #X obj 361 21 loadbang;
 #X msg 361 51 \; pd dsp 1;
 #X floatatom 21 198 5 0 0 0 - - - 0;
@@ -14,40 +14,67 @@
 #X obj 21 286 bp~ 500 1000;
 #X obj 21 70 route freq gain panvol;
 #X obj 21 316 *~;
-#X msg 296 338 \$1 100;
-#X floatatom 296 159 5 0 0 0 - - - 0;
-#X obj 199 437 earplug~ 0 0;
-#X obj 296 362 line;
 #X obj 132 310 switch~;
 #X obj 132 286 tgl 19 0 empty empty empty 0 -10 0 12 #fcfcfc #000000 #000000 0 1;
 #X obj 132 262 change;
 #X text 89 155 switch on/off before 0 to stop startup pops, f 12;
 #X obj 189 216 max 0;
 #X obj 132 238 > -0.3;
-#X obj 296 248 expr 360-$f1;
+#X obj 303 253 hsl 100 20 -1 1 0 0 empty empty empty -2 -10 0 12 #fcfcfc #000000 #000000 0 1;
+#X obj 300 349 line~;
+#X msg 300 325 \$1 100;
+#X obj 300 278 expr ($f1 + 1)/8;
+#X floatatom 300 302 5 0 0 0 - - - 0;
+#N canvas 68 97 450 300 pan2~ 0;
+#X obj 51 98 cos~;
+#X obj 111 98 cos~;
+#X obj 33 128 *~;
+#X obj 93 128 *~;
+#X obj 33 158 outlet~;
+#X obj 93 158 outlet~;
+#X obj 33 24 inlet~;
+#X obj 111 24 inlet~;
+#X obj 111 74 +~ 0.75;
+#X connect 0 0 2 1;
+#X connect 1 0 3 1;
+#X connect 2 0 4 0;
+#X connect 3 0 5 0;
+#X connect 6 0 2 0;
+#X connect 6 0 3 0;
+#X connect 7 0 8 0;
+#X connect 7 0 0 0;
+#X connect 8 0 1 0;
+#X restore 199 437 pd pan2~;
+#X floatatom 296 159 5 0 0 0 - - - 0;
+#X obj 296 182 sin;
+#X floatatom 296 206 5 0 0 0 - - - 0;
 #X connect 2 0 12 1;
 #X connect 3 0 4 0;
 #X connect 4 0 13 0;
-#X connect 6 0 17 0;
+#X connect 6 0 26 0;
 #X connect 7 0 6 1;
 #X connect 8 0 7 0;
 #X connect 9 0 10 0;
-#X connect 9 1 16 0;
-#X connect 10 0 23 0;
-#X connect 10 0 24 0;
+#X connect 9 1 27 0;
+#X connect 10 0 19 0;
+#X connect 10 0 20 0;
 #X connect 11 0 12 0;
 #X connect 12 0 14 0;
 #X connect 13 0 2 0;
 #X connect 13 1 14 1;
 #X connect 13 2 9 0;
 #X connect 14 0 6 0;
-#X connect 15 0 18 0;
-#X connect 16 0 25 0;
-#X connect 17 0 5 0;
-#X connect 17 1 5 1;
-#X connect 18 0 17 1;
-#X connect 20 0 19 0;
-#X connect 21 0 20 0;
-#X connect 23 0 8 0;
-#X connect 24 0 21 0;
-#X connect 25 0 15 0;
+#X connect 16 0 15 0;
+#X connect 17 0 16 0;
+#X connect 19 0 8 0;
+#X connect 20 0 17 0;
+#X connect 21 0 24 0;
+#X connect 22 0 26 1;
+#X connect 23 0 22 0;
+#X connect 24 0 25 0;
+#X connect 25 0 23 0;
+#X connect 26 0 5 0;
+#X connect 26 1 5 1;
+#X connect 27 0 28 0;
+#X connect 28 0 29 0;
+#X connect 29 0 21 0;
diff --git a/GdpdExample/osc-earplug.pd b/GdpdExample/osc-earplug.pd
new file mode 100644
index 0000000..9cfb577
--- /dev/null
+++ b/GdpdExample/osc-earplug.pd
@@ -0,0 +1,53 @@
+#N canvas 650 226 456 518 12;
+#X obj 361 21 loadbang;
+#X msg 361 51 \; pd dsp 1;
+#X obj 50 277 osc~ 440;
+#X floatatom 21 198 5 0 0 0 - - - 0;
+#X obj 21 22 r fromGodot\$0;
+#X obj 21 46 list trim;
+#X obj 199 467 dac~ 1 2;
+#X obj 199 407 *~;
+#X obj 189 127 unpack f f;
+#X obj 21 70 route freq gain panvol;
+#X obj 50 301 *~;
+#X msg 296 338 \$1 100;
+#X floatatom 296 159 5 0 0 0 - - - 0;
+#X obj 199 437 earplug~ 0 0;
+#X obj 296 362 line;
+#X obj 189 264 line~;
+#X msg 189 240 \$1 100;
+#X floatatom 189 177 5 0 0 0 - - - 0;
+#X obj 132 310 switch~;
+#X obj 132 286 tgl 19 0 empty empty empty 0 -10 0 12 #fcfcfc #000000 #000000 0 1;
+#X obj 132 262 change;
+#X text 89 155 switch on/off before 0 to stop startup pops, f 12;
+#X obj 189 216 max 0;
+#X obj 132 238 > -0.3;
+#X obj 296 248 expr 360-$f1;
+#X obj 296 182 expr $f1*180/3.141592;
+#X connect 2 0 10 0;
+#X connect 3 0 2 0;
+#X connect 4 0 5 0;
+#X connect 5 0 9 0;
+#X connect 7 0 13 0;
+#X connect 8 0 17 0;
+#X connect 8 1 12 0;
+#X connect 9 0 3 0;
+#X connect 9 1 10 1;
+#X connect 9 2 8 0;
+#X connect 10 0 7 0;
+#X connect 11 0 14 0;
+#X connect 12 0 25 0;
+#X connect 13 0 6 0;
+#X connect 13 1 6 1;
+#X connect 14 0 13 1;
+#X connect 15 0 7 1;
+#X connect 16 0 15 0;
+#X connect 17 0 22 0;
+#X connect 17 0 23 0;
+#X connect 19 0 18 0;
+#X connect 20 0 19 0;
+#X connect 22 0 16 0;
+#X connect 23 0 20 0;
+#X connect 24 0 11 0;
+#X connect 25 0 24 0;
diff --git a/GdpdExample/osc.gd b/GdpdExample/osc.gd
index df084d1..ca0b6f9 100644
--- a/GdpdExample/osc.gd
+++ b/GdpdExample/osc.gd
@@ -1,10 +1,13 @@
 extends RigidBody
 
-export (String, MULTILINE) var patch = ""
 export (float, 0, 100) var audible_range_max = 10.0
 export (float, 1, 12) var preset = 1
 
+export (bool) var use_embeded_patch = false
+export (String, MULTILINE) var patch = ""
+
 var _my_patch = "res://osc.pd"
+#var _my_patch = "res://osc-earplug.pd"
 var _my_id = 0
 
 func set_size(size):
@@ -44,7 +47,10 @@ func set_color(color):
 
 func _ready():
 	# save patch (for export)
-#	_save_patch()
+	if use_embeded_patch:
+		assert(_my_patch.substr(0, 7) == "user://", "use userpath with embeded_patch enabled !")
+		assert(patch != "", "patch is empty?")
+		_save_patch()
 
 	# load patch
 	_my_id = Global.load_patch(ProjectSettings.globalize_path(_my_patch))
@@ -63,16 +69,11 @@ func _on_Events_player_transform_updated(playerpos, playerheading):
 	var distance = mypos.distance_to(playerpos)
 	# calculate angle
 	var angle = fmod(fmod(playerpos2d.angle_to_point(mypos2d) + playerheading - PI/2, PI*2) + PI*2, PI*2)
-#	if angle > PI:
-#		angle = angle - PI*2
-	# radians to degrees
-#	if angle < 0:
-#		angle = angle + PI*2
-	angle = rad2deg(angle)
+	if angle > PI:
+		angle = angle - PI*2
 	# (check)
 #	print(str(_my_id) +" : ("+ str(distance) +","+ str(angle) +")")
 	# calculate gain
-#	var gain = max(1 - distance/audible_range_max, 0)
 	var gain = 1 - distance/audible_range_max
 	# send to the patch
 	Global._gdpd.start_message(3)
@@ -84,7 +85,6 @@ func _on_Events_player_transform_updated(playerpos, playerheading):
 
 func _exit_tree():
 	Global.close_patch(_my_id)
-	pass
 
 func _save_patch():
 	# save patch
diff --git a/GdpdExample/osc.pd b/GdpdExample/osc.pd
index 19b0592..922e97f 100644
--- a/GdpdExample/osc.pd
+++ b/GdpdExample/osc.pd
@@ -1,4 +1,4 @@
-#N canvas 540 203 456 518 12;
+#N canvas 659 277 456 518 12;
 #X obj 361 21 loadbang;
 #X msg 361 51 \; pd dsp 1;
 #X obj 50 277 osc~ 440;
@@ -10,10 +10,6 @@
 #X obj 189 127 unpack f f;
 #X obj 21 70 route freq gain panvol;
 #X obj 50 301 *~;
-#X msg 296 338 \$1 100;
-#X floatatom 296 159 5 0 0 0 - - - 0;
-#X obj 199 437 earplug~ 0 0;
-#X obj 296 362 line;
 #X obj 189 264 line~;
 #X msg 189 240 \$1 100;
 #X floatatom 189 177 5 0 0 0 - - - 0;
@@ -23,29 +19,60 @@
 #X text 89 155 switch on/off before 0 to stop startup pops, f 12;
 #X obj 189 216 max 0;
 #X obj 132 238 > -0.3;
-#X obj 296 248 expr 360-$f1;
+#X obj 303 253 hsl 100 20 -1 1 0 0 empty empty empty -2 -10 0 12 #fcfcfc #000000 #000000 0 1;
+#X obj 300 349 line~;
+#X msg 300 325 \$1 100;
+#X obj 300 278 expr ($f1 + 1)/8;
+#X floatatom 300 302 5 0 0 0 - - - 0;
+#N canvas 68 97 450 300 pan2~ 0;
+#X obj 51 98 cos~;
+#X obj 111 98 cos~;
+#X obj 33 128 *~;
+#X obj 93 128 *~;
+#X obj 33 158 outlet~;
+#X obj 93 158 outlet~;
+#X obj 33 24 inlet~;
+#X obj 111 24 inlet~;
+#X obj 111 74 +~ 0.75;
+#X connect 0 0 2 1;
+#X connect 1 0 3 1;
+#X connect 2 0 4 0;
+#X connect 3 0 5 0;
+#X connect 6 0 2 0;
+#X connect 6 0 3 0;
+#X connect 7 0 8 0;
+#X connect 7 0 0 0;
+#X connect 8 0 1 0;
+#X restore 199 437 pd pan2~;
+#X floatatom 296 159 5 0 0 0 - - - 0;
+#X obj 296 182 sin;
+#X floatatom 296 206 5 0 0 0 - - - 0;
 #X connect 2 0 10 0;
 #X connect 3 0 2 0;
 #X connect 4 0 5 0;
 #X connect 5 0 9 0;
-#X connect 7 0 13 0;
-#X connect 8 0 17 0;
-#X connect 8 1 12 0;
+#X connect 7 0 25 0;
+#X connect 8 0 13 0;
+#X connect 8 1 26 0;
 #X connect 9 0 3 0;
 #X connect 9 1 10 1;
 #X connect 9 2 8 0;
 #X connect 10 0 7 0;
-#X connect 11 0 14 0;
-#X connect 12 0 24 0;
-#X connect 13 0 6 0;
-#X connect 13 1 6 1;
-#X connect 14 0 13 1;
-#X connect 15 0 7 1;
+#X connect 11 0 7 1;
+#X connect 12 0 11 0;
+#X connect 13 0 18 0;
+#X connect 13 0 19 0;
+#X connect 15 0 14 0;
 #X connect 16 0 15 0;
-#X connect 17 0 22 0;
-#X connect 17 0 23 0;
-#X connect 19 0 18 0;
-#X connect 20 0 19 0;
-#X connect 22 0 16 0;
-#X connect 23 0 20 0;
-#X connect 24 0 11 0;
+#X connect 18 0 12 0;
+#X connect 19 0 16 0;
+#X connect 20 0 23 0;
+#X connect 21 0 25 1;
+#X connect 22 0 21 0;
+#X connect 23 0 24 0;
+#X connect 24 0 22 0;
+#X connect 25 0 6 0;
+#X connect 25 1 6 1;
+#X connect 26 0 27 0;
+#X connect 27 0 28 0;
+#X connect 28 0 20 0;
diff --git a/GdpdExample/osc.tscn b/GdpdExample/osc.tscn
index 91e0835..45c2780 100644
--- a/GdpdExample/osc.tscn
+++ b/GdpdExample/osc.tscn
@@ -15,51 +15,6 @@ collision_mask = 0
 physics_material_override = SubResource( 3 )
 gravity_scale = 0.0
 script = ExtResource( 1 )
-patch = "#N canvas 540 203 456 518 12;
-#X obj 361 21 loadbang;
-#X msg 361 51 \\; pd dsp 1;
-#X obj 80 277 osc~ 440;
-#X floatatom 21 198 5 0 0 0 - - - 0;
-#X obj 21 22 r fromGodot\\$0;
-#X obj 21 46 list trim;
-#X obj 199 467 dac~ 1 2;
-#X obj 199 407 *~;
-#X obj 189 230 line~;
-#X msg 189 206 \\$1 100;
-#X obj 189 127 unpack f f;
-#X floatatom 189 177 5 0 0 0 - - - 0;
-#X obj 21 70 route freq gain panvol;
-#X obj 80 301 *~;
-#X msg 296 338 \\$1 100;
-#X floatatom 296 159 5 0 0 0 - - - 0;
-#X obj 199 437 earplug~ 0 0;
-#X obj 296 362 line;
-#X obj 122 158 != 0;
-#X obj 122 206 switch~;
-#X obj 122 182 tgl 19 0 empty empty empty 0 -10 0 12 #fcfcfc #000000 #000000 0 1;
-#X connect 2 0 13 0;
-#X connect 3 0 2 0;
-#X connect 4 0 5 0;
-#X connect 5 0 12 0;
-#X connect 7 0 16 0;
-#X connect 8 0 7 1;
-#X connect 9 0 8 0;
-#X connect 10 0 11 0;
-#X connect 10 1 15 0;
-#X connect 11 0 9 0;
-#X connect 11 0 18 0;
-#X connect 12 0 3 0;
-#X connect 12 1 13 1;
-#X connect 12 2 10 0;
-#X connect 13 0 7 0;
-#X connect 14 0 17 0;
-#X connect 15 0 14 0;
-#X connect 16 0 6 0;
-#X connect 16 1 6 1;
-#X connect 17 0 16 1;
-#X connect 18 0 20 0;
-#X connect 20 0 19 0;
-"
 
 [node name="CollisionShape" type="CollisionShape" parent="."]
 shape = SubResource( 1 )