diff --git a/midi2beep.py b/midi2beep.py
index 66ba284..ff872cb 100644
--- a/midi2beep.py
+++ b/midi2beep.py
@@ -2,12 +2,12 @@
 
 ###
 #
-# midi2beep.py
+# midi4beep.py
 # Author: Adrien MALINGREY <adrien@malingrey.fr>
 #
 # Play MIDI files with PC speaker using the beep command.
 #
-# Usage: python3 midi2beep.py <midi file>
+# Usage: python3 midi4beep.py <midi file> [channel]
 #
 # Dependencies:
 # - Python 3
@@ -21,75 +21,64 @@ import subprocess
 import math
 import mido
 
+
+class PCSpeaker(mido.ports.BaseOutput):
+    def __init__(self, channel=-1):
+        super().__init__(self)
+        self.channel = channel
+        self.note_on = 0
+        self.process = None
+
+    def _send(self, message):
+        if (message.type == "note_on" or message.type == "note_off") \
+            and (message.channel == self.channel or (self.channel == -1 and message.channel != 9)):
+            if message.type == "note_on" and message.velocity and message.note > self.note_on:
+                self.process = subprocess.Popen(
+                    [
+                        "beep",
+                        "-f",
+                        str(int(440 * math.pow(2, (message.note - 69) / 12))),
+                        "-l100000",
+                    ]
+                )
+                self.note_on = message.note
+                
+            elif self.process and (message.type == "note_off" or (message.type == "note_on" and message.note == self.note_on)):
+                self.process.terminate()
+                self.process = None
+                self.note_on = 0
+
+    def reset(self):
+        if self.process:
+            self.process.terminate()
+            self.process = None
+            self.note_on = 0
+
+    def panic(self):
+        if self.process:
+            self.process.kill()
+            self.process = None
+            self.note_on = 0
+
+    def _close(self):
+        self.reset()
+
+
 if len(sys.argv) < 2:
-    print("Usage: python3 midi2beep.py <midi file> [channel]")
+    print("Usage: python3 midi4beep.py <midi file> [channel]")
     sys.exit(1)
 
-arpege = 0.015#ms
-
-FREQUENCIES = [
-#   C,       C#,      D,       D#,      E,       F,       F#,      G,       G#,      A,     A#,     B
-    16.35,   17.32,   18.35,   19.45,   20.6,    21.83,   23.12,   24.5,    25.96,   27.5, 29.14,   30.87,
-    32.7,    34.65,   36.71,   38.89,   41.2,    43.65,   46.25,   49,      51.91,   55,   58.27,   61.74,
-    65.41,   69.3,    73.42,   77.78,   82.41,   87.31,   92.5,    98,      103.83,  110,  116.54,  123.47,
-    130.81,  138.59,  146.83,  155.56,  164.81,  174.61,  185,     196,     207.65,  220,  233.08,  246.94,
-    261.63,  277.18,  293.66,  311.13,  329.63,  349.23,  369.99,  392,     415.3,   440,  466.16,  493.88,
-    523.25,  554.37,  587.33,  622.25,  659.26,  698.46,  739.99,  783.99,  830.61,  880,  932.33,  987.77,
-    1046.5,  1108.73, 1174.66, 1244.51, 1318.51, 1396.91, 1479.98, 1567.98, 1661.22, 1760, 1864.66, 1975.53,
-    2093,    2217.46, 2349.32, 2489.02, 2637.02, 2793.83, 2959.96, 3135.96, 3322.44, 3520, 3729.31, 3951.07,
-    4186.01, 4434.92, 4698.64, 4978.03, 5274.04, 5587.65, 5919.91, 6271.93, 6644.88, 7040, 7458.62, 7902.13,
-]
-
-midi_file_path = sys.argv[1]
+path = sys.argv[1]
 try:
-  mid=mido.MidiFile(midi_file_path)
+    mid = mido.MidiFile(path)
 except TypeError:
-  mido.read_syx_file(midi_file_path)
-  
+    mido.read_syx_file(path)
+
 if len(sys.argv) > 2:
     channel = int(sys.argv[2])
 else:
     channel = -1
 
-time = 0
-note_on = 0
-start = 0
-tempo = 500000
-
-try:
-  for msg in mid:
-    time += msg.time
-
-    if msg.type == "track_name":
-      print(msg.name)
-
-    if msg.type == "set_tempo":
-      tempo = msg.tempo
-
-    if (msg.type == "note_on" or msg.type == "note_off") and (msg.channel == channel or (channel == -1 and msg.channel != 9)):
-      if msg.time:
-        lines = math.ceil(4e6 * (time - start) / tempo)
-        if note_on:
-          for _ in range(lines):
-            print(note_on * " " + "█")
-          subprocess.run(["beep", f"-f{FREQUENCIES[note_on]:.0f}", f"-l{1000*(time - start):.0f}"])
-        elif start:
-          for _ in range(lines):
-            print()
-          subprocess.run(["sleep", f"{0.8*(time - start)}"])
-
-      if msg.type == "note_on" and msg.velocity:
-        if msg.time or msg.note > note_on:
-          note_on = msg.note
-      else:
-        note_on = 0
-      
-      start = time
-
-  lines = math.ceil(4e6 * (time - start) / tempo)
-  for _ in range(lines):
-    print(note_on * " " + "█")
-  subprocess.run(["beep", f"-f{FREQUENCIES[note_on]:.0f}", f"-l{1000*(time - start):.0f}"])
-
-except KeyboardInterrupt:
-  subprocess.run(["beep", "-f1", "-l1"])
+with PCSpeaker(channel) as speaker:
+    for msg in mid.play():
+        speaker.send(msg)