Simple beat follower script demo

PulseOnBeat.cs

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

public class PulseOnBeat : MonoBehaviour {

	public float minScale;
	public float maxScale;

	public float BPM = 140;
	float last = Mathf.Infinity;
	
	public UnityEvent uEvent;




	public float MPB {
		get {
			return 1/BPM;
		}
	}
	public float SPB {
		get {
			return MPB * 60;
		}
	}

	public float seconds {
		get {
			if (aSource!=null){
				return aSource.time;
			} else {
				return Time.time;
			}
		}
	}

	public AudioSource aSource;

	// Update is called once per frame
	void Update () {
		Debug.Log(MPB);
		Debug.Log(SPB);
		float beat = (seconds / SPB)%1;
		float quality = Mathf.Pow((beat-0.5f)*2,2);
		transform.localScale = Vector3.one*Mathf.Lerp(minScale, maxScale, beat);

		if (beat<last){
			uEvent.Invoke();
		}

		last = beat;
	}
}