Unity3D Sound Zone - Collider2D instead of point audio source (because Unity only supports audio coming from a single point or circle, instead of coming from a custom shape). AudioSource will move as close to the player as possible but keeping inside the collider. Please modify it to suit your use-cases (modify the Player.Instance and AudioMgr.I…

SoundZone.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

// 2D Sound Zone.
// Recommended AudioSource settings: Spatial Blend: 3D. Doppler Level, Spread and reverb zone mix set to 0.
// AudioSource will move as close to the player as possible, but will stay within the collider.
// Only works with only one Collider2D component.
// https://gist.github.com/aDu/d57b923c96f242e28fe029f3980c5123
public class SoundZone : MonoBehaviour
{
    public AudioSource audioSource; // Audio Source must be in a child object and not itself, otherwise the collider will also move.

    private Collider2D col;

    private void Awake() {
        col = GetComponent<Collider2D>();
    }

    private void Update() {
        audioSource.transform.position = col.ClosestPoint(AudioMgr.Instance.AudioListener.transform.position);
    }
}