*

Unity/Assets/Scripts/Motor.cs

@@ -0,0 +1,51 @@
+using UnityEngine;
+using System.Collections;
+
+public class Motor : MonoBehaviour {
+	public GameObject rotor;
+	public float maxRpm = 3000;
+	public float speed;
+	public float minPitch = 0.8f;
+	public float maxPitch = 1.2f;
+	public AudioSource soundSource;
+
+	private float[] speedHistory;
+	int historyId = 0;
+
+	void Start(){
+		speedHistory = new float[15];
+		for (int i = 0; i < speedHistory.Length; ++i) {
+			speedHistory[i] = 0;
+		}
+	}
+
+	void Update(){
+		if (soundSource != null) {
+
+			speedHistory[historyId] = speed;
+			historyId = (historyId + 1) % speedHistory.Length;
+			float smoothSpeed = 0;
+			
+			for (int i = 0; i < speedHistory.Length; ++i) {
+				smoothSpeed += speedHistory[i];
+			}
+			smoothSpeed = smoothSpeed / (float)speedHistory.Length;
+
+
+			float pitch = (smoothSpeed / maxRpm) * (maxPitch - minPitch) + minPitch;
+		
+
+
+			soundSource.pitch = pitch;
+
+			if(soundSource.isPlaying && speed < 5){
+				soundSource.Stop();
+			}
+
+			if(!soundSource.isPlaying && speed >=5){
+				soundSource.Play();
+			}
+		
+		}
+	}
+}