//you could do this with a dictionary, but ill use a list.
using System.Linq;
[CreateAssetMenu(FileName = "AudioClipList");
class ClipList : ScriptableObject {
    public string listName;
    public List<Clip> Clips = new List<Clip>();
    public bool Contains (String name)  => Clips.Any(c => c.name == name);
    public Clip GetClip(String name) {
var list = Clips.Where(c => c.name == name).ToList();
return list.Length>0? list[0]:null;
}
//if there is a clip and it is not null or missing remove it
    public void RemoveClip(String name) => if (GetClip(name) is Clip c) Clips.Remove(c);
    public void AddClip(string name, AudioClip clip) => if (!Clips.Contains(name)) Clips.Add(new Clip(){ name = name, audioClip = clip });
    public void AddClip(Clip clip) => if (clip != null && !Contains(clip.name)) Clip.Add(clip);
}

//this attribute makes the normal class able to show up in the inspector
[System.Serializable]
public class Clip {
    public string name;
    public string type;
    public AudioClip audioClip;
    public bool playing, paused;
}

[CreateAssetMenu(MenuName="Audio/MixerPreset"]
public class MixerPreset : ScriptableObject {
    public string Name;
    public AudioMixer mixer;
    public AudioSource prefab;
    //Assuming a mixer can be made up of a series of audio sources
    List<AudioSource> audioSources = new List<AudioSource>();
    public ClipsList clips;

    public void PlayClip(string name)
{
    var clip = clips.GetClip(name);
    if (clip ==null || clip.playing) return;
    StartCoroutine("PlaySoundCoroutine", clip);
}

public void Pause(string name) {
    var clip = clips.GetClip(name);
    if (clip ==null) return;
    var sources =audioSources.Where(a=>a.clip== clip.clip).ToList();
if (sources.Length == 0) return;
sources[0].Pause();
clip.paused = true;
}
public void RestartSound(string name) {
    var clip = clips.GetClip(name);
    if (clip ==null) return;
    var sources = audioSources.Where(a=>a.clip == clip.clip).ToList();
    if(sources.Length==0)return;
    sources[0].Pause();
    sources[0].time =0;
    sources[0].Unpause();
}
public void UnpauseSound(string name){
    var clip = clips.GetClip(name);
    if (clip ==null) return;
    var sources = audioSources.Where(a=>a.clip == clip.clip).ToList();
    if (sources.Length ==0) return;
sources[0].Unpause();
clip.paused = false;
}
Ienumerator PlaySoundCoroutine (Clip clip) 
{
    List<AudioSource> inactiveSources = audioSources.Where(a=>!a.enabled).ToList();
    AudioSource source = inactiveSources.Length >0? inactiveSources[0] :  AudioSource.Instantiate(audioSourcePrefab);
    source.SetActive(true);
    source.outputAudioMixerGroup = mixer;
    source.playOneShot(clip.clip);

    //keep audio source active while a clip is playing or paused
    while(source.isPlaying || clip.paused) 
    {
        yield return null;
    }
    source.SetActive(false);
    clip.playing = false;
}

class AudioManager : MonoBehaviour {
    public static void PlayPresetClip(MixerPreset mixerPreset, string clip) => mixerPreset.Play(clip);
    
    public MixerPreset mixerPreset; //this will give you a slot to place a mixerpreset
}