Azure Speech SDK × HoloLens 2 (Emulator) 試行中

こちらのチュートリアルを参考に，Azure Speech SDK × HoloLens 2を試そうとしてました．

Azure Speech Services チュートリアル-1. 音声認識と議事録の統合と使用 - Mixed Reality | Microsoft Docs
mixed-reality/mrlearning-speechSDK-ch1.md at master · MicrosoftDocs/mixed-reality · GitHub

Speech Service Region は "japaneast"にしました．
エミュレータデプロイする前にまずエディタで軽く確認しようとしましたが，この画面でフリーズ．

f:id:xrdnk:20200206232449p:plain

ApplicationExceptionが出てしまった．そしてUnityは永続ループしたかのように停止できない．
タスクマネージャでタスク終了するしかなかった…．
StackTraceはこんな感じです．

ApplicationException: Exception with an error code: 0x13 (SPXERR_START_RECOGNIZING_INVALID_STATE_TRANSITION) Microsoft.CognitiveServices.Speech.Internal.SpxExceptionThrower.ThrowIfFail (System.IntPtr hr) (at :0) Microsoft.CognitiveServices.Speech.Recognizer.StartContinuousRecognition () (at :0) Microsoft.CognitiveServices.Speech.Recognizer.DoAsyncRecognitionAction (System.Action recoImplAction) (at :0) Microsoft.CognitiveServices.Speech.SpeechRecognizer.b44_0 () (at :0) System.Threading.Tasks.Task.InnerInvoke () (at <437ba245d8404784b9fbab9b439ac908>:0) System.Threading.Tasks.Task.Execute () (at <437ba245d8404784b9fbab9b439ac908>:0) --- End of stack trace from previous location where exception was thrown --- System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () (at <437ba245d8404784b9fbab9b439ac908>:0) System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) (at <437ba245d8404784b9fbab9b439ac908>:0) System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) (at <437ba245d8404784b9fbab9b439ac908>:0) System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) (at <437ba245d8404784b9fbab9b439ac908>:0) System.Runtime.CompilerServices.ConfiguredTaskAwaitable+ConfiguredTaskAwaiter.GetResult () (at <437ba245d8404784b9fbab9b439ac908>:0) LunarcomWakeWordRecognizer+d11.MoveNext () (at Assets/Lunarcom/Lunarcom Scripts/LunarcomWakeWordRecognizer.cs:82) --- End of stack trace from previous location where exception was thrown --- System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () (at <437ba245d8404784b9fbab9b439ac908>:0) System.Runtime.CompilerServices.AsyncMethodBuilderCore+<>c.b__6_0 (System.Object state) (at <437ba245d8404784b9fbab9b439ac908>:0) UnityEngine.UnitySynchronizationContext+WorkRequest.Invoke () (at :0) UnityEngine.UnitySynchronizationContext:ExecuteTasks()

ここが怪しい．

Lunarcom Scripts/LunarcomWakeWordRecognizer.cs:82

BeginRecognizing()メソッド内のawaitのところの処理．
認識の開始がそもそもできてない？

    public async void BeginRecognizing()
    {
        if (micPermissionGranted)
        {
            CreateSpeechRecognizer();

            if (recognizer != null)
            {
                await recognizer.StartContinuousRecognitionAsync().ConfigureAwait(false);
            }
        }
    }

HL2 Emulatorで念のため試しても真っ黒でした．眠いのでここまで．
クライアント側のエラーかサーバー側のエラーかまだ特定できてないです．明日までに解決したい．
デバッグしよ…MRTK2のSamplesを見てみよう…．もしご存じの方はお力添えを😭