Unity_Metronome.cs

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

public class Test_Sample : MonoBehaviour
{
    [Header("Metronome Setting")]
    [SerializeField] float MusicBPM = 60f;

    const float StdBPM = 60f;
    double SampleRate = 0f;
    double NextTime = 0f;
    double TikTime = 0f;
    bool Ticked = false;

    int N;

    void Start()
    {
        double StartTick = AudioSettings.dspTime;
        SampleRate = AudioSettings.outputSampleRate;

        TikTime = (StdBPM / MusicBPM);
        NextTime = StartTick + TikTime;
    }

    private void LateUpdate()
    {
        if (!Ticked && NextTime >= AudioSettings.dspTime)
        {
            Ticked = true;
            PlayTik();
        }
    }

    private void FixedUpdate()
    {
        Metronome();
    }

    void Metronome()
    {
        TikTime = (StdBPM / MusicBPM);

        if (AudioSettings.dspTime >= NextTime)
        {
            Ticked = false;
            NextTime += TikTime;
        }
    }

    void PlayTik()
    {
        //Debug.Log(NextTime); 시간 오차 체크
        N++;
        if (N > 4)
        {
            N = 1;
        }
        Debug.Log("Tick : " + N + "/" + 4);
    }
}