Sending another AudioSource together with the voice over the server.

using Normal.Realtime;
using Normal.Realtime.Native;
using UnityEngine;

public class NpcVoiceBroadcaster : MonoBehaviour {
    private AudioInputStream _audioInputStream;

    void Start() {
        // Create an audio input stream (voice: true, sampleRate: 48000, channels: 1)
        var room = FindObjectOfType<Realtime>().room;
        _audioInputStream = room.CreateAudioInputStream(true, 48000, 1);
    }

    // Call this method whenever you have a new chunk of NPC audio data
    public void SendNpcAudio(float[] audioData) {
        if (_audioInputStream != null) {
            _audioInputStream.SendRawAudioData(audioData);
        }
    }

    void OnDestroy() {
        _audioInputStream?.Dispose();
    }
}

using Normal.Realtime;
using Normal.Realtime.Native;
using UnityEngine;

public class NpcVoiceBroadcaster : MonoBehaviour {
    private AudioInputStream _audioInputStream;

    void Start() {
        // Create an audio input stream (voice: true, sampleRate: 48000, channels: 1)
        var room = FindObjectOfType<Realtime>().room;
        _audioInputStream = room.CreateAudioInputStream(true, 48000, 1);
    }

    // Call this method whenever you have a new chunk of NPC audio data
    public void SendNpcAudio(float[] audioData) {
        if (_audioInputStream != null) {
            _audioInputStream.SendRawAudioData(audioData);
        }
    }

    void OnDestroy() {
        _audioInputStream?.Dispose();
    }
}

using Normal.Realtime;
using Normal.Realtime.Native;
using UnityEngine;

public class NpcVoiceReceiver : MonoBehaviour {
    private AudioOutputStream _audioOutputStream;
    private AudioSource _audioSource;

    void Start() {
        // You need the host's clientID and streamID (communicate these via your app logic)
        int hostClientID = ...;
        int streamID = ...;

        var room = FindObjectOfType<Realtime>().room;
        _audioOutputStream = room.GetAudioOutputStream(hostClientID, streamID);
// Set up your AudioSource to play the audio (implementation depends on your audio pipeline)
        _audioSource = GetComponent<AudioSource>();
        // You would need to pull audio data from _audioOutputStream.GetAudioData() and feed it to the AudioSource
    }

    void OnDestroy() {
        _audioOutputStream?.Dispose();
    }
}

using Normal.Realtime;
using Normal.Realtime.Native;
using UnityEngine;

public class NpcVoiceReceiver : MonoBehaviour {
    private AudioOutputStream _audioOutputStream;
    private AudioSource _audioSource;

    void Start() {
        // You need the host's clientID and streamID (communicate these via your app logic)
        int hostClientID = ...;
        int streamID = ...;

        var room = FindObjectOfType<Realtime>().room;
        _audioOutputStream = room.GetAudioOutputStream(hostClientID, streamID);
// Set up your AudioSource to play the audio (implementation depends on your audio pipeline)
        _audioSource = GetComponent<AudioSource>();
        // You would need to pull audio data from _audioOutputStream.GetAudioData() and feed it to the AudioSource
    }

    void OnDestroy() {
        _audioOutputStream?.Dispose();
    }
}