Simplify quit: use Escape key instead of Ctrl+C

- Rollback to original tty-based input
- Add Escape key to quit
- Remove arrow key detection (use < > keys only)
- Simplify the play() method

src/osc_sender.py

@@ -76,7 +76,7 @@ class OSCSender:
         print(f"\nFundamental: {self.fundamental} Hz")
         print(f"Destination: {self.ip}:{self.port}")
         print(f"{'=' * 50}")
-        print("← Previous | Next → | Ctrl+C to quit")
+        print("← Previous | Next → | Escape to quit")
 
     def play(self):
         """Interactive playback with keyboard control."""
@@ -84,48 +84,35 @@ class OSCSender:
             print("No chords loaded!")
             return
 
-        import select
+        try:
-        import signal
+            import threading
+            import tty
+            import termios
+            import os
 
             # Send and display first chord
             self.send_chord(self.current_index)
             self.display_chord(self.current_index)
 
             def get_key():
-            """Get a keypress with timeout. Returns None if no key pressed."""
+                """Get a single keypress."""
-            if select.select([sys.stdin], [], [], 0.1)[0]:
+                fd = sys.stdin.fileno()
-                return sys.stdin.read(1)
+                old_settings = termios.tcgetattr(fd)
-            return None
-
-        print("\nUse arrow keys to navigate. Press Ctrl+C to quit.")
-
-        # Handle SIGINT explicitly
-        def handle_sigint(signum, frame):
-            raise KeyboardInterrupt
-
-        signal.signal(signal.SIGINT, handle_sigint)
-
                 try:
+                    tty.setraw(sys.stdin.fileno())
+                    ch = sys.stdin.read(1)
+                finally:
+                    termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
+                return ch
+
+            print("\nUse arrow keys to navigate. Press Escape to quit.")
+
             while True:
                 key = get_key()
-                if key is None:
-                    continue
 
-                # Left arrow
+                # Escape key - quit
-                if key == "\x1b":  # Escape sequence start
+                if key == "\x1b":
-                    next1 = get_key()
+                    break
-                    if next1 == "[":
-                        next2 = get_key()
-                        if next2 == "D":  # Left arrow
-                            if self.current_index > 0:
-                                self.current_index -= 1
-                                self.send_chord(self.current_index)
-                                self.display_chord(self.current_index)
-                        elif next2 == "C":  # Right arrow
-                            if self.current_index < len(self.chords) - 1:
-                                self.current_index += 1
-                                self.send_chord(self.current_index)
-                                self.display_chord(self.current_index)
 
                 # Alternative: use < and > keys
                 elif key == "," or key == "<":
@@ -140,9 +127,9 @@ class OSCSender:
                         self.display_chord(self.current_index)
 
         except KeyboardInterrupt:
+            pass  # Clean exit
+
         print("\n\nPlayback stopped.")
-        except Exception:
-            pass  # Clean exit for any other error
 
     def send_all(self):
         """Send all chords in sequence (for testing)."""