diff --git a/A-Whole-New-World-(Theme-From-'Aladdin').mid b/A-Whole-New-World-(Theme-From-'Aladdin').mid
new file mode 100644
index 0000000..85a62a8
Binary files /dev/null and b/A-Whole-New-World-(Theme-From-'Aladdin').mid differ
diff --git a/Bohemian-Rhapsody-1.mid b/Bohemian-Rhapsody-1.mid
new file mode 100644
index 0000000..5e1a8af
Binary files /dev/null and b/Bohemian-Rhapsody-1.mid differ
diff --git a/Star-Wars-Theme-(From-'Star-Wars').mid b/Star-Wars-Theme-(From-'Star-Wars').mid
new file mode 100644
index 0000000..b0fe849
Binary files /dev/null and b/Star-Wars-Theme-(From-'Star-Wars').mid differ
diff --git a/darude-sandstorm.mid b/darude-sandstorm.mid
new file mode 100644
index 0000000..b112d62
Binary files /dev/null and b/darude-sandstorm.mid differ
diff --git a/mario64-medley.mid b/mario64-medley.mid
new file mode 100644
index 0000000..1067088
Binary files /dev/null and b/mario64-medley.mid differ
diff --git a/platformio.ini b/platformio.ini
index 9ecc526..b9a30fd 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -13,7 +13,7 @@ default_envs = megaatmega2560
 
 [common]
 lib_deps =
-  Tone
+  ToneLibrary
 #  AccelStepper
 #  SpeedyStepper
   MIDI Library
diff --git a/send.py b/send.py
index 1756908..8d16d76 100644
--- a/send.py
+++ b/send.py
@@ -1,15 +1,17 @@
 #!/usr/bin/env python3
 
-import sys, getopt
+import sys, argparse
 import time
 import threading
 
 from mido import MidiFile
 import serial
 
+drum_channels = [9]
+
 def serialreceive(ser):
   print("Serial running")
-  while True:
+  while ser:
     try:
       line = ser.readline().decode()
       print(line)
@@ -20,32 +22,36 @@ def serialreceive(ser):
 def main(argv):
   inputfile = ''
   outputport = ''
-  try:
-    opts, args = getopt.getopt(argv, "hi:o:",["ifile=","oport="])
-  except getopt.GetoptError:
-    print('send.py -i <inputfile> -o <outputport>')
-    sys.exit(2)
-  for opt, arg in opts:
-    if opt == '-h':
-      print('send.py -i <inputfile> -o <outputport>')
-      sys.exit()
-    elif opt in ("-i", "--ifile"):
-      inputfile = arg
-    elif opt in ("-o", "--oport"):
-      outputport = arg
-  with serial.Serial(outputport, 115200, timeout=12) as ser:
+  parser = argparse.ArgumentParser()
+  parser.add_argument('midifilename', help="the midi file you want to send")
+  parser.add_argument('-P', '--serialport', help="serial port to open", default="/dev/ttyUSB0")
+  parser.add_argument('--with-drums', action="store_true", help="send percussion track 10")
+  args = parser.parse_args()
+  with serial.Serial(args.serialport, 115200, timeout=12) as ser:
     receivethread = threading.Thread(target=serialreceive, args=(ser,))
+    receivethread.daemon = True
     receivethread.start()
-    with MidiFile(inputfile) as mid:
+    time.sleep(1)
+    with MidiFile(args.midifilename) as mid:
       for msg in mid:
         time.sleep(msg.time)
         if not msg.is_meta:
           if msg.type == 'note_on' or msg.type == 'note_off':
-            print(msg)
-            ser.write(msg.bin())
+            if (not (msg.channel in drum_channels)) or args.with_drums:
+              print(msg)
+              ser.write(msg.bin())
+            else:
+              print("skipped percussion: " + str(msg))
           else:
             print("not sent: " + str(msg))
-        #time.sleep(1000)
+            if msg.type == 'program_change' and msg.program in [50,]:
+              drum_channels.append(msg.channel)
+              
+        else:
+          print("meta message: " + str(msg))
+      print("EOF")
+    print("done")
+  print("serial closed")
 
 if __name__ == "__main__":
   main(sys.argv[1:])
diff --git a/smario.mid b/smario.mid
new file mode 100644
index 0000000..c273142
Binary files /dev/null and b/smario.mid differ
diff --git a/src/main.cpp b/src/main.cpp
index 5fa17de..bac279d 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -20,14 +20,33 @@
 
 MIDI_CREATE_CUSTOM_INSTANCE(HardwareSerial, Serial, MIDI, MySettings);
 
-Tone freq1;
-Tone freq2;
-Tone freq3;
+const int NUM_STEPPER = 5;
 
-int ledState = LOW;             // ledState used to set the LED
+Tone freq[NUM_STEPPER];
+
+unsigned long previousMillis[NUM_STEPPER] = {0};        // will store last time LED was updated
 const long interval = 1000;           // interval at which to blink (milliseconds)
-unsigned long previousMillis = 0;        // will store last time LED was updated
-unsigned long lastMillis[3] = {0,0,0};        // will store last time LED was updated
+volatile byte playing[NUM_STEPPER] = {0};
+int enable_pin[NUM_STEPPER] = {X_ENABLE_PIN, Y_ENABLE_PIN, Z_ENABLE_PIN, E0_ENABLE_PIN, E1_ENABLE_PIN};
+
+
+int findSameNotes(byte noteNumber) {
+      int candidate = -1;
+      bool alreadyPlayingHarmonic = false;
+      for (int i=0; i<NUM_STEPPER; i++) {
+        if (playing[i] == noteNumber) return -2; // already playing this note
+        if (noteNumber+12 == playing[i] || noteNumber == playing[i]+12) alreadyPlayingHarmonic = true;
+        for (int k=i+1; k<NUM_STEPPER; k++) {
+          if (playing[k] == playing[i]) {
+            return k;
+          } else if (playing[k]+12 == playing[i] || playing[k] == playing[i]+12) {
+            candidate = k;
+          }
+        }
+      }
+      if (candidate >= 0 && !alreadyPlayingHarmonic) return candidate;
+      return -1;
+}
 
 
 void handleNoteOn(byte inChannel, byte inNumber, byte inVelocity)
@@ -38,20 +57,37 @@ void handleNoteOn(byte inChannel, byte inNumber, byte inVelocity)
 //    Serial.println(inVelocity);
 //    Serial.flush();
     //noTone();
-    long freq = sNotePitches[inNumber];
-    freq *=4;
-    while (freq > 12000) freq/=2;
-    if (inChannel == 9) digitalWrite(LED_PIN, HIGH);
-    if (inChannel == 9) {
-        freq1.play(freq);
-        lastMillis[0] = millis();
-    } else if (inChannel == 7) {
-        freq2.play(freq);
-        lastMillis[1] = millis();
-    } else if (inChannel == 2) {
-        freq3.play(freq);
-        lastMillis[2] = millis();
+
+    //if (inChannel == 0 || inChannel >= 32) return;
+    //if (inChannel == 8) return;
+
+    long f = sNotePitches[inNumber];
+    f *= 4;
+    while (f > 12000) f/=2;
+    //digitalWrite(LED_PIN, HIGH);
+    bool sent = false;
+    for (int i=0; i<NUM_STEPPER; i++) {
+        if (playing[i] == 0) {
+            digitalWrite(enable_pin[i], LOW);
+            freq[i].play(f);
+            playing[i] = inNumber;
+            previousMillis[i] = millis();
+            sent = true;
+            break;
+        }
     }
+
+    if (!sent) {
+      digitalWrite(LED_PIN, HIGH);
+      int i = findSameNotes(inNumber);
+      if (i >= 0) {
+            digitalWrite(enable_pin[i], LOW);
+            freq[i].play(f);
+            playing[i] = inNumber;
+            previousMillis[i] = millis();
+      }
+    }
+
 }
 void handleNoteOff(byte inChannel, byte inNumber, byte inVelocity)
 {
@@ -59,21 +95,30 @@ void handleNoteOff(byte inChannel, byte inNumber, byte inVelocity)
 //    Serial.print(inNumber);
 //    Serial.print("\tvelocity: ");
 //    Serial.println(inVelocity);
-    if (inChannel == 9) digitalWrite(LED_PIN, LOW);
-    if (inChannel == 9) freq1.stop();
-    if (inChannel == 7) freq2.stop();
-    if (inChannel == 2) freq3.stop();
+
+    //if (inChannel == 0 || inChannel >= 32) return;
+    //if (inChannel == 8) return;
+
+    digitalWrite(LED_PIN, LOW);
+    for (int i=0; i<NUM_STEPPER; i++) {
+        if (playing[i] == inNumber) {
+            freq[i].stop();
+            playing[i] = 0;
+            break;
+        }
+    }
+
 }
 
 void setup()
 {
   Serial.begin(115200);
-  delay(500);
+/*  delay(500);
   Serial.println("##########");
   Serial.println("MIDI");
   Serial.println("##########");
   Serial.flush();
-
+*/
   // initialize LED digital pin as an output.
   pinMode(LED_PIN, OUTPUT);
 
@@ -89,61 +134,40 @@ void setup()
   pinMode(Z_STEP_PIN, OUTPUT);
   pinMode(Z_ENABLE_PIN, OUTPUT);
 
-  digitalWrite(X_DIR_PIN, HIGH);
-  digitalWrite(X_ENABLE_PIN, HIGH);
+  pinMode(E0_DIR_PIN, OUTPUT);
+  pinMode(E0_STEP_PIN, OUTPUT);
+  pinMode(E0_ENABLE_PIN, OUTPUT);
 
-  digitalWrite(Y_DIR_PIN, HIGH);
-  digitalWrite(Y_ENABLE_PIN, HIGH);
+  pinMode(E1_DIR_PIN, OUTPUT);
+  pinMode(E1_STEP_PIN, OUTPUT);
+  pinMode(E1_ENABLE_PIN, OUTPUT);
+
+  for (int i=0; i<NUM_STEPPER; i++) {
+    digitalWrite(enable_pin[i], HIGH);
+  }
 
-  digitalWrite(Z_DIR_PIN, HIGH);
-  digitalWrite(Z_ENABLE_PIN, HIGH);
 
   MIDI.setHandleNoteOn(handleNoteOn);
   MIDI.setHandleNoteOff(handleNoteOff);
   MIDI.begin(MIDI_CHANNEL_OMNI);
 
-  freq1.begin(X_STEP_PIN);
-  freq2.begin(Y_STEP_PIN);
-  freq3.begin(Z_STEP_PIN);
-
-//  digitalWrite(X_ENABLE_PIN, LOW);
-//  tone(X_STEP_PIN, 14000);
-//  tone(X_STEP_PIN, 4*440);
-//  delay(2000);
+  freq[0].begin(X_STEP_PIN);
+  freq[1].begin(Y_STEP_PIN);
+  freq[2].begin(Z_STEP_PIN);
+  freq[3].begin(E0_STEP_PIN);
+  freq[4].begin(E1_STEP_PIN);
 
 }
 
 void loop()
 {
   unsigned long currentMillis = millis();
-  if (currentMillis - previousMillis >= interval) {
-    previousMillis = currentMillis;
-    Serial.println("arduino");
-    // if the LED is off turn it on and vice-versa:
-    if (ledState == LOW) {
-      ledState = HIGH;
-    } else {
-      ledState = LOW;
-    }
 
-    // set the LED with the ledState of the variable:
-    //digitalWrite(LED_PIN, ledState);
-  }
-
-  if (currentMillis - lastMillis[0] >= 2000 || lastMillis[0] == 0) {
-    digitalWrite(X_ENABLE_PIN, HIGH);
-  } else {
-    digitalWrite(X_ENABLE_PIN, LOW);
-  }
-  if (currentMillis - lastMillis[1] >= 2000 || lastMillis[1] == 0) {
-    digitalWrite(Y_ENABLE_PIN, HIGH);
-  } else {
-    digitalWrite(Y_ENABLE_PIN, LOW);
-  }
-  if (currentMillis - lastMillis[2] >= 2000 || lastMillis[2] == 0) {
-    digitalWrite(Z_ENABLE_PIN, HIGH);
-  } else {
-    digitalWrite(Z_ENABLE_PIN, LOW);
+  for (int i=0; i<NUM_STEPPER; i++) {
+    if (currentMillis - previousMillis[i] >= interval || previousMillis[i] == 0) {
+      digitalWrite(enable_pin[i], HIGH);
+      playing[i] = 0;
+    }
   }
   
   //Serial.println("test");
@@ -159,4 +183,7 @@ void loop()
   //tone(X_STEP_PIN, 120U);
    // wait for a second
   //delay(100);
+
+
+
 }
diff --git a/src/midi/pitches.h b/src/midi/pitches.h
index 284c14d..0cb1542 100644
--- a/src/midi/pitches.h
+++ b/src/midi/pitches.h
@@ -92,6 +92,14 @@
 #define NOTE_CS8 4435
 #define NOTE_D8  4699
 #define NOTE_DS8 4978
+#define NOTE_E8  5274
+#define NOTE_F8  5588
+#define NOTE_FS8 5920
+#define NOTE_G8  6272
+#define NOTE_GS8 6645
+#define NOTE_A8  7040
+#define NOTE_AS8 7459
+#define NOTE_B8  7902
 
 static const uint16_t sNotePitches[] = {
     NOTE_B0, NOTE_C1, NOTE_CS1, NOTE_D1, NOTE_DS1, NOTE_E1, NOTE_F1, NOTE_FS1,
@@ -104,5 +112,7 @@ static const uint16_t sNotePitches[] = {
     NOTE_G5, NOTE_GS5, NOTE_A5, NOTE_AS5, NOTE_B5, NOTE_C6, NOTE_CS6, NOTE_D6,
     NOTE_DS6, NOTE_E6, NOTE_F6, NOTE_FS6, NOTE_G6, NOTE_GS6, NOTE_A6, NOTE_AS6,
     NOTE_B6, NOTE_C7, NOTE_CS7, NOTE_D7, NOTE_DS7, NOTE_E7, NOTE_F7, NOTE_FS7,
-    NOTE_G7, NOTE_GS7, NOTE_A7, NOTE_AS7, NOTE_B7, NOTE_C8, NOTE_CS8, NOTE_D8, NOTE_DS8,
+    NOTE_G7, NOTE_GS7, NOTE_A7, NOTE_AS7, NOTE_B7, NOTE_C8, NOTE_CS8, NOTE_D8,
+    NOTE_DS8, NOTE_E8, NOTE_F8, NOTE_FS8, NOTE_G8, NOTE_GS8, NOTE_A8, NOTE_AS8,
+    NOTE_B8
 };
diff --git a/toto-africa.mid b/toto-africa.mid
new file mode 100644
index 0000000..d4ffd3b
Binary files /dev/null and b/toto-africa.mid differ