"get_devices is not allowed to be called from a MonoBehaviour"

Hi,

When I try to instantiate a prefab with PunVoiceRecorder (and it's two required components: PhotonVoiceSpeaker and AudioSource, plus a PhotonView), I get the error below:

get_devices is not allowed to be called from a MonoBehaviour constructor (or instance field initializer), call it in Awake or Start instead. Called from MonoBehaviour 'PhotonVoiceNetwork' on game object 'New Game Object'.

The problem appears to be that PhotonVoiceNetworkSingleton/PhotonVoiceNetwork constructor calls Microphone.devices.Length (devices is a property), and that doesn't seem to be allowed by Unity.

PhotonVoiceNetwork()
    {
        client = new UnityVoiceClient(this);
        client.loadBalancingPeer.DebugOut = DebugLevel.ALL;
        //PhotonNetwork.logLevel = PhotonLogLevel.Full;

        if (Microphone.devices.Length < 1)
        {
            Debug.LogError("PUNVoice: No microphone device found");
        }

        // debug only
        // client.UseLossCompensation = false;
        
		// client.loadBalancingPeer.QuickResendAttempts = 3;
        // client.loadBalancingPeer.SentCountAllowance = 7;
        // PhotonNetwork.networkingPeer.QuickResendAttempts = 3;
        // PhotonNetwork.networkingPeer.SentCountAllowance = 7;
        
        //client.loadBalancingPeer.DebugOut = PhotonVoiceSettings.Instance.DebugLevel; // null ref while PhotonVoiceSettings is object's script
    }

(Unity 5.4)

Any ideas?

Thank you!