The pitch of the audio source.

	// Decreases the pitch in the given seconds
	var startingPitch = 4;
	var timeToDecrease = 5;
	@script RequireComponent(AudioSource)
	function Start() {
		audio.pitch = startingPitch;
	}
	function Update() {
		if(audio.pitch > 0)
			audio.pitch -= ((Time.deltaTime * startingPitch) / timeToDecrease);
	}

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(AudioSource))]
public class Example : MonoBehaviour {
    public int startingPitch = 4;
    public int timeToDecrease = 5;
    void Start() {
        audio.pitch = startingPitch;
    }
    void Update() {
        if (audio.pitch > 0)
            audio.pitch -= Time.deltaTime * startingPitch / timeToDecrease;
        
    }
}

import UnityEngine
import System.Collections

[RequireComponent(typeof(AudioSource))]
public class Example(MonoBehaviour):

	public startingPitch as int = 4

	public timeToDecrease as int = 5

	def Start() as void:
		audio.pitch = startingPitch

	def Update() as void:
		if audio.pitch > 0:
			audio.pitch -= ((Time.deltaTime * startingPitch) / timeToDecrease)