AUDIO MIXERS In Unity
Unity Audio Mixers, adjustable with sliders and saving its values to persist! EVERYTHING YOU NEED TO KNOW comprehensive guide
How to add audio to your game (the basics of audio): • Unity AUDIO Tutorial - Make Sound Effects ...
How to play a specific clip instead of a random one:
[SerializeField] AudioClip clip; //Just use a clip instead of a list
audioSource.Play(clip); //Or PlayOneShot(clip)
or to play an element from the list:
audioSource.Play(clips[0]) //Lists start from 0. So 0 is the 1st element and 2 is the 3rd element in the inspector