diff --git a/abstractions/receive_mpe.maxpat b/abstractions/receive_mpe.maxpat
index cb5f856..636e858 100644
--- a/abstractions/receive_mpe.maxpat
+++ b/abstractions/receive_mpe.maxpat
@@ -45,8 +45,8 @@
 					"numinlets" : 1,
 					"numoutlets" : 1,
 					"outlettype" : [ "" ],
-					"patching_rect" : [ 50.0, 100.0, 83.0, 22.0 ],
-					"text" : "prepend track"
+					"patching_rect" : [ 50.0, 100.0, 107.0, 22.0 ],
+					"text" : "prepend mpe_port"
 				}
 
 			}
diff --git a/abstractions/send_mpe.maxpat b/abstractions/send_mpe.maxpat
index ad76ac6..ec42413 100644
--- a/abstractions/send_mpe.maxpat
+++ b/abstractions/send_mpe.maxpat
@@ -44,8 +44,8 @@
 					"numinlets" : 1,
 					"numoutlets" : 1,
 					"outlettype" : [ "" ],
-					"patching_rect" : [ 99.0, 100.0, 83.0, 22.0 ],
-					"text" : "prepend track"
+					"patching_rect" : [ 99.0, 100.0, 107.0, 22.0 ],
+					"text" : "prepend mpe_port"
 				}
 
 			}
@@ -88,7 +88,7 @@
 				"box" : 				{
 					"comment" : "data_to_send: any",
 					"id" : "obj-12",
-					"index" : 0,
+					"index" : 1,
 					"maxclass" : "inlet",
 					"numinlets" : 0,
 					"numoutlets" : 1,
@@ -99,9 +99,9 @@
 			}
 , 			{
 				"box" : 				{
-					"comment" : "track_id: int | symbol",
+					"comment" : "target_id: int | symbol",
 					"id" : "obj-13",
-					"index" : 0,
+					"index" : 2,
 					"maxclass" : "inlet",
 					"numinlets" : 0,
 					"numoutlets" : 1,
@@ -146,9 +146,7 @@
 				}
 
 			}
- ],
-		"dependency_cache" : [  ],
-		"autosave" : 0
+ ]
 	}
 
 }
diff --git a/projects/test/code/convert_nn_to_freq.test.js b/projects/test/code/convert_nn_to_freq.test.js
index 72a1163..1cae4b2 100644
--- a/projects/test/code/convert_nn_to_freq.test.js
+++ b/projects/test/code/convert_nn_to_freq.test.js
@@ -55,5 +55,21 @@ module.exports = {
       parser.freq(44),
       0.1
     );
+  },
+  testMicroTone: function*(maxAPI) {
+    maxAPI.outlet({
+      convert_nn_to_freq: { inlet0: 60, inlet1: 8192 + 8192 / 4, inlet2: 1 }
+    });
+    expect(yield, 'Eighth higher than C=60').to.be.closeTo(
+      parser.freq(60.25),
+      0.1
+    );
+    maxAPI.outlet({
+      convert_nn_to_freq: { inlet0: 65, inlet1: 8192 - 8192 / 2, inlet2: 1 }
+    });
+    expect(yield, 'Quarter lower than F=65').to.be.closeTo(
+      parser.freq(64.5),
+      0.1
+    );
   }
 };
diff --git a/projects/test/code/receive_mpe.test.js b/projects/test/code/receive_mpe.test.js
new file mode 100644
index 0000000..c2be94a
--- /dev/null
+++ b/projects/test/code/receive_mpe.test.js
@@ -0,0 +1,56 @@
+const { assert } = require('chai');
+
+module.exports = {
+  // Name of the patcher which you want to test
+  target: 'receive_mpe',
+
+  // `initPatcher` will be executed just before each test function.
+  initPatcher: function*(maxAPI) {
+    maxAPI.outlet({
+      send_mpe: { inlet1: 8888 },
+      receive_mpe: { inlet0: 8888 }
+    });
+    setTimeout(() => {
+      maxAPI.outlet({ send_mpe: { inlet0: 1 } });
+    }, 50);
+    assert.notEqual(yield, null, 'isOk');
+  },
+
+  // The key of each test generator function should start with 'test'
+  testReceiveNumber: function*(maxAPI) {
+    maxAPI.outlet({
+      send_mpe: { inlet0: 178 }
+    });
+    assert.deepEqual(yield, { outlet0: 178 }, 'natural number');
+    maxAPI.outlet({
+      send_mpe: { inlet1: 145 },
+      receive_mpe: { inlet0: 145 }
+    });
+    setTimeout(() => {
+      maxAPI.outlet({ send_mpe: { inlet0: -78.5 } });
+    }, 50);
+    assert.deepEqual(yield, { outlet0: -78.5 }, 'negative float');
+  },
+  testReceiveContinuously: function*(maxAPI) {
+    for (let i = 0; i < 3000; i++) {
+      maxAPI.outlet({
+        send_mpe: { inlet0: i }
+      });
+      assert.deepEqual(yield, { outlet0: i });
+    }
+  },
+  testReceiveList: function*(maxAPI) {
+    maxAPI.outlet({
+      send_mpe: { inlet1: 277 },
+      receive_mpe: { inlet0: 277 }
+    });
+    setTimeout(() => {
+      maxAPI.outlet({ send_mpe: { inlet0: [-0.3, 'hi', 5] } });
+    }, 50);
+    assert.deepEqual(
+      yield,
+      { outlet0: [-0.3, 'hi', 5] },
+      'list of mixed types'
+    );
+  }
+};
diff --git a/projects/test/test.maxpat b/projects/test/test.maxpat
index 7258aa3..4c3adcd 100644
--- a/projects/test/test.maxpat
+++ b/projects/test/test.maxpat
@@ -10,7 +10,7 @@
 		}
 ,
 		"classnamespace" : "box",
-		"rect" : [ 34.0, 78.0, 942.0, 788.0 ],
+		"rect" : [ 1474.0, -102.0, 1420.0, 968.0 ],
 		"bglocked" : 0,
 		"openinpresentation" : 0,
 		"default_fontsize" : 12.0,
@@ -38,6 +38,79 @@
 		"style" : "",
 		"subpatcher_template" : "",
 		"boxes" : [ 			{
+				"box" : 				{
+					"id" : "obj-1",
+					"maxclass" : "newobj",
+					"numinlets" : 1,
+					"numoutlets" : 1,
+					"outlettype" : [ "dictionary" ],
+					"patching_rect" : [ 575.0, 387.0, 99.0, 22.0 ],
+					"text" : "dict.pack outlet0:"
+				}
+
+			}
+, 			{
+				"box" : 				{
+					"id" : "obj-6",
+					"maxclass" : "newobj",
+					"numinlets" : 1,
+					"numoutlets" : 1,
+					"outlettype" : [ "" ],
+					"patching_rect" : [ 575.0, 431.0, 125.0, 22.0 ],
+					"text" : "prepend receive_mpe"
+				}
+
+			}
+, 			{
+				"box" : 				{
+					"id" : "obj-5",
+					"maxclass" : "newobj",
+					"numinlets" : 1,
+					"numoutlets" : 1,
+					"outlettype" : [ "" ],
+					"patching_rect" : [ 575.0, 280.0, 105.0, 22.0 ],
+					"text" : "dict.unpack inlet0:"
+				}
+
+			}
+, 			{
+				"box" : 				{
+					"id" : "obj-4",
+					"maxclass" : "newobj",
+					"numinlets" : 1,
+					"numoutlets" : 2,
+					"outlettype" : [ "", "" ],
+					"patching_rect" : [ 319.5, 280.0, 140.0, 22.0 ],
+					"text" : "dict.unpack inlet0: inlet1:"
+				}
+
+			}
+, 			{
+				"box" : 				{
+					"color" : [ 0.96078431372549, 0.588235294117647, 0.152941176470588, 1.0 ],
+					"id" : "obj-3",
+					"maxclass" : "newobj",
+					"numinlets" : 1,
+					"numoutlets" : 1,
+					"outlettype" : [ "" ],
+					"patching_rect" : [ 575.0, 334.0, 77.0, 22.0 ],
+					"text" : "receive_mpe"
+				}
+
+			}
+, 			{
+				"box" : 				{
+					"color" : [ 0.96078431372549, 0.588235294117647, 0.152941176470588, 1.0 ],
+					"id" : "obj-2",
+					"maxclass" : "newobj",
+					"numinlets" : 2,
+					"numoutlets" : 0,
+					"patching_rect" : [ 319.5, 334.0, 140.0, 22.0 ],
+					"text" : "send_mpe"
+				}
+
+			}
+, 			{
 				"box" : 				{
 					"id" : "obj-8",
 					"maxclass" : "message",
@@ -72,18 +145,6 @@
 					"text" : "tdd"
 				}
 
-			}
-, 			{
-				"box" : 				{
-					"id" : "obj-1",
-					"maxclass" : "newobj",
-					"numinlets" : 2,
-					"numoutlets" : 1,
-					"outlettype" : [ "dictionary" ],
-					"patching_rect" : [ 252.0, 494.0, 217.0, 22.0 ],
-					"text" : "dict.pack outlet0: outlet1: @triggers 0 1"
-				}
-
 			}
 , 			{
 				"box" : 				{
@@ -127,15 +188,22 @@
 					"id" : "obj-12",
 					"maxclass" : "newobj",
 					"numinlets" : 1,
-					"numoutlets" : 1,
-					"outlettype" : [ "" ],
-					"patching_rect" : [ 64.0, 194.0, 179.0, 22.0 ],
-					"text" : "dict.unpack convert_nn_to_freq:"
+					"numoutlets" : 3,
+					"outlettype" : [ "", "", "" ],
+					"patching_rect" : [ 64.0, 194.0, 530.0, 22.0 ],
+					"text" : "dict.unpack convert_nn_to_freq: send_mpe: receive_mpe:"
 				}
 
 			}
  ],
 		"lines" : [ 			{
+				"patchline" : 				{
+					"destination" : [ "obj-6", 0 ],
+					"source" : [ "obj-1", 0 ]
+				}
+
+			}
+, 			{
 				"patchline" : 				{
 					"destination" : [ "obj-9", 2 ],
 					"source" : [ "obj-11", 2 ]
@@ -162,6 +230,20 @@
 					"source" : [ "obj-12", 0 ]
 				}
 
+			}
+, 			{
+				"patchline" : 				{
+					"destination" : [ "obj-4", 0 ],
+					"source" : [ "obj-12", 1 ]
+				}
+
+			}
+, 			{
+				"patchline" : 				{
+					"destination" : [ "obj-5", 0 ],
+					"source" : [ "obj-12", 2 ]
+				}
+
 			}
 , 			{
 				"patchline" : 				{
@@ -170,6 +252,13 @@
 					"source" : [ "obj-14", 0 ]
 				}
 
+			}
+, 			{
+				"patchline" : 				{
+					"destination" : [ "obj-1", 0 ],
+					"source" : [ "obj-3", 0 ]
+				}
+
 			}
 , 			{
 				"patchline" : 				{
@@ -177,6 +266,35 @@
 					"source" : [ "obj-30", 0 ]
 				}
 
+			}
+, 			{
+				"patchline" : 				{
+					"destination" : [ "obj-2", 1 ],
+					"source" : [ "obj-4", 1 ]
+				}
+
+			}
+, 			{
+				"patchline" : 				{
+					"destination" : [ "obj-2", 0 ],
+					"source" : [ "obj-4", 0 ]
+				}
+
+			}
+, 			{
+				"patchline" : 				{
+					"destination" : [ "obj-3", 0 ],
+					"source" : [ "obj-5", 0 ]
+				}
+
+			}
+, 			{
+				"patchline" : 				{
+					"destination" : [ "obj-30", 0 ],
+					"midpoints" : [ 584.5, 512.0, 49.0, 512.0, 49.0, 77.0, 73.5, 77.0 ],
+					"source" : [ "obj-6", 0 ]
+				}
+
 			}
 , 			{
 				"patchline" : 				{
@@ -228,6 +346,20 @@
 				"type" : "TEXT",
 				"implicit" : 1
 			}
+, 			{
+				"name" : "send_mpe.maxpat",
+				"bootpath" : "~/repos/m4l-mpe-tools/abstractions",
+				"patcherrelativepath" : "../../abstractions",
+				"type" : "JSON",
+				"implicit" : 1
+			}
+, 			{
+				"name" : "receive_mpe.maxpat",
+				"bootpath" : "~/repos/m4l-mpe-tools/abstractions",
+				"patcherrelativepath" : "../../abstractions",
+				"type" : "JSON",
+				"implicit" : 1
+			}
  ],
 		"autosave" : 0
 	}
diff --git a/projects/test/test.maxproj b/projects/test/test.maxproj
index 6d32e7f..8a0804d 100644
--- a/projects/test/test.maxproj
+++ b/projects/test/test.maxproj
@@ -2,7 +2,7 @@
 	"name" : "test",
 	"version" : 1,
 	"creationdate" : 3642055787,
-	"modificationdate" : 3642075359,
+	"modificationdate" : 3642082862,
 	"viewrect" : [ 0.0, 44.0, 361.0, 533.0 ],
 	"autoorganize" : 0,
 	"hideprojectwindow" : 0,
@@ -35,17 +35,17 @@
 ,
 	"searchpath" : 	{
 		"0" : 		{
-			"bootpath" : "~/repos/m4l-mpe-tools/node_modules/tdd-max",
-			"projectrelativepath" : "../../node_modules/tdd-max",
-			"label" : "node_modules/tdd-max",
+			"bootpath" : "~/repos/m4l-mpe-tools/abstractions",
+			"projectrelativepath" : "../../abstractions",
+			"label" : "",
 			"recursive" : 1,
 			"enabled" : 1,
 			"includeincollective" : 0
 		}
 ,
 		"1" : 		{
-			"bootpath" : "~/repos/m4l-mpe-tools/abstractions",
-			"projectrelativepath" : "../../abstractions",
+			"bootpath" : "~/repos/m4l-mpe-tools/node_modules/tdd-max",
+			"projectrelativepath" : "../../node_modules/tdd-max",
 			"label" : "",
 			"recursive" : 1,
 			"enabled" : 1,