ichni_Official/Assets/Scripts/Menu/SongSelection/SongSelectionManager.cs

using System;
using System.Collections;
using System.Collections.Generic;
using DG.Tweening;
using Ichni.Menu.UI;
using Ichni.RhythmGame;
using Ichni.UI;
using Sirenix.OdinInspector;
using UnityEngine;

namespace Ichni.Menu
{
    public partial class SongSelectionManager : SerializedMonoBehaviour
    {
        public static SongSelectionManager instance;
        
        public SongSelectionUIPage songSelectionUIPage;
        
        public float currentFilterValue;
        public Tweener filterTweener;
        
        private void Awake()
        {
            instance = this;
            currentFilterValue = 100f;
        }
        
    }
    
    public partial class SongSelectionManager
    {
        public void SetPreview(SongItemData connectedSong, bool isLocked)
        {
            MenuAudioManager.instance.audioContainer.StopEvent("PlayPreview");
            MenuAudioManager.instance.audioContainer.SetSwitch(connectedSong.songSwitch);
            MenuAudioManager.instance.audioContainer.PostEvent("PlayPreview");

            float targetFilterValue = isLocked ? 50 : 100;
            if (!Mathf.Approximately(currentFilterValue, targetFilterValue))
            {
                filterTweener.Kill(true);
                filterTweener = 
                    DOTween.To(() => currentFilterValue, x => currentFilterValue = x, targetFilterValue, 1f)
                    .SetEase(Ease.OutQuad)
                    .OnUpdate(() =>
                    {
                        MenuAudioManager.instance.audioContainer.SetRTPC("PreviewLowPassFilter", currentFilterValue);
                    }).Play();
            }
        }
    }
}