An example of an audio effects player in Unity that varies the audio's pitch and volume.

AudioEffectPlayer example

// using NaughtyAttributes; // Uncomment if you are using NaughtyAttributes
using UnityEngine;
using Random = UnityEngine.Random;

namespace your.namespace { // Set to your namespace
    public class AudioEffectPlayer: MonoBehaviour {
        [SerializeField] private float minPitch = 1.0f;
        [SerializeField] private float maxPitch = 1.0f;
        [SerializeField] private float minVolume = 1.0f;
        [SerializeField] private float maxVolume = 1.0f;
        [SerializeField] private AudioSource audioSource;

        // [Button("Test Play")] // Uncomment if you are using NaughtyAttributes
        public void Play() {
            this.audioSource.pitch = Random.Range(this.minPitch, this.maxPitch);
            this.audioSource.volume = Random.Range(this.minVolume, this.maxVolume);
            this.audioSource.Play();
        }


        private void OnValidate() {
            if (this.audioSource == null) {
                this.audioSource = this.gameObject.GetComponent<AudioSource>();
            }
        }
    }
}