Play Audio Clips In Sequence From Array To Audio Sources In Array

I'm working on a project where a PA system, with multiple audio sources in an array, needs to play a sequence of audio clips in order all at once. I've managed to get all the audio sources to play at once, and to get them to play a specified clip from the array, but getting them to play in sequence has been a challenge. I've tried using IEnumerators/coroutines to make them play the clip, wait while it's playing, and then play the next clip, but instead it either only plays from one audio source at a time, and then starts the whole sequence again on the next, or only plays the last clip. I suspect this is because it tries to play them all at once, ignoring the coroutine altogether. This is the script I've got at the moment

 public AudioSource[] loudSpeaker;
 public AudioClip[] monologues;


 // Start is called before the first frame update
 void Start()
 {
     OpeningMonologue();
 }

 // Update is called once per frame
 void Update()
 {

 }

 public void PlayLoudspeakers()
 {
     for (var i = 0; i < loudSpeaker.Length; i++)
     {
         loudSpeaker[i].Play();
     }

 }

 public void OpeningMonologue()
 {
     for (var i = 0; i < loudSpeaker.Length; i++)
     {
         loudSpeaker[i].clip = monologues[0];
         PlayLoudspeakers();

     }

 }

0, of course, being the first audio clip in the array. If I change that value, the selected clip changes, but I need them to all play in order, and I haven't been able to achieve that.