Fix keyboard repeated bug, add background

scripts/Global.gd

@@ -1,10 +1,16 @@
 extends Node
 
+@warning_ignore("unused_signal")
 signal chord_changed(chord: String)
+@warning_ignore("unused_signal")
 signal loop_changed(state: bool)
 
+@warning_ignore("unused_signal")
 signal note_volume(vol: float)
+@warning_ignore("unused_signal")
 signal chord_volume(vol: float)
+@warning_ignore("unused_signal")
 signal rhythm_volume(vol: float)
 
+@warning_ignore("unused_signal")
 signal rhythm_tempo(tempo: float)

scripts/KeyboardController.gd

@@ -1,7 +1,9 @@
 extends Node
 
 func _input(event):
-	if event is InputEventKey and event.pressed:
+	if event is InputEventKey and event.is_pressed():
+		if event.is_echo():
+			return
 		# Major (Top Row)
 		if event.keycode == KEY_Q:
 			$"Buttons/Chords/eb".button_pressed()