When I click on an Object with an Audio Source all sounds of the game play at the same time

Question

I'm making a sound game for kids where they have to place notes in the proper line that sounds like the note. So I need the notes and the lines to play a sound when clicked so i made a script that look like this to use in all the game objects that are going to play a sound:

public class Playable : MonoBehaviour
{
    private AudioSource audioSource;
    private AudioClip sfx;
    void Start()
    {
        audioSource = gameObject.GetComponent<AudioSource>();
        sfx = audioSource.clip;
    }
    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            audioSource.PlayOneShot(sfx);
        }
    }
}

The issue is that when i click on any object all the sounds start playing at the same time and I don't know how to fix it. What can I do?

Answer 1

FIXED: I changed Input.GetMouse.Down to an OnMouseDown method (gameObject needs to have a collider for it to work).