How to handle multiple animations/animators

SpritesController.cs

using System.Collections.Generic;
using UnityEngine;

public class SpritesController : MonoBehaviour {

    public SpriteRenderer[] _sprites;
    List<Animator> _anims = new List<Animator>();
    AnimatorStateInfo _stateInfo;

    int _animAudioTrack1HashActive;
    int _animAudioTrack1HashUnactive;
    int _animAudioTrack2HashActive;
    int _animAudioTrack2HashUnactive;
    int _animAudioTrack3HashActive;
    int _animAudioTrack3HashUnactive;

    void Awake ()
    {
        for (int i = 0; i < _sprites.Length; i++)
        {
            Animator anim;
            if (_sprites[i].gameObject.GetComponent<Animator>())
            {
                anim = _sprites[i].gameObject.GetComponent<Animator>();
                _anims.Add(anim);
            }
        }

        _animAudioTrack1HashActive = Animator.StringToHash("Base Layer.c_AudioTrack1_active");
        _animAudioTrack1HashUnactive = Animator.StringToHash("Base Layer.c_AudioTrack1_unactive");
        _animAudioTrack2HashActive = Animator.StringToHash("Base Layer.c_AudioTrack2_active");
        _animAudioTrack2HashUnactive = Animator.StringToHash("Base Layer.c_AudioTrack2_unactive");
        _animAudioTrack3HashActive = Animator.StringToHash("Base Layer.c_AudioTrack3_active");
        _animAudioTrack3HashUnactive = Animator.StringToHash("Base Layer.c_AudioTrack3_unactive");
    }

    void Update ()
    {
        if (Input.GetKeyUp(KeyCode.A))
        {
            _stateInfo = _anims[0].GetCurrentAnimatorStateInfo(0);
            if (_stateInfo.fullPathHash == _animAudioTrack1HashActive)
            {
                _anims[0].SetTrigger("isUnactive");
            }
            if (_stateInfo.fullPathHash == _animAudioTrack1HashUnacAudioTrack2)
            {
                _anims[0].SetTrigger("isActive");
            }
        }

        if (Input.GetKeyUp(KeyCode.S))
        {
            _stateInfo = _anims[1].GetCurrentAnimatorStateInfo(0);
            if (_stateInfo.fullPathHash == _animAudioTrack2HashActive)
            {
                _anims[1].SetTrigger("isUnactive");
            }
            if (_stateInfo.fullPathHash == _animAudioTrack2HashUnactive)
            {
                _anims[1].SetTrigger("isActive");
            }
        }

        if (Input.GetKeyUp(KeyCode.D))
        {
            _stateInfo = _anims[2].GetCurrentAnimatorStateInfo(0);
            if (_stateInfo.fullPathHash == _animAudioTrack2HashActive)
            {
                _anims[2].SetTrigger("isUnactive");
            }
            if (_stateInfo.fullPathHash == _animAudioTrack2HashUnactive)
            {
                _anims[2].SetTrigger("isActive");
            }
        }
    }
}