diff --git a/server/Exceptions.py b/server/Exceptions.py
index 2fc4a21e..22f61a1a 100644
--- a/server/Exceptions.py
+++ b/server/Exceptions.py
@@ -8,6 +8,11 @@ class NoModeLoadedException(Exception):
         )
 
 
+class HalfPrecisionChangingException(Exception):
+    def __str__(self):
+        return repr("HalfPrecision related exception.")
+
+
 class ONNXInputArgumentException(Exception):
     def __str__(self):
         return repr("ONNX received invalid argument.")
diff --git a/server/voice_changer/RVC/ModelSlotGenerator.py b/server/voice_changer/RVC/ModelSlotGenerator.py
index 036aa0f6..58563bc5 100644
--- a/server/voice_changer/RVC/ModelSlotGenerator.py
+++ b/server/voice_changer/RVC/ModelSlotGenerator.py
@@ -48,6 +48,15 @@ def _setInfoByPytorch(slot: ModelSlot, file: str):
         if slot.embedder.endswith("768"):
             slot.embedder = slot.embedder[:-3]
 
+        if slot.embedder == EnumEmbedderTypes.hubert.value:
+            slot.embedder = EnumEmbedderTypes.hubert
+        elif slot.embedder == EnumEmbedderTypes.contentvec.value:
+            slot.embedder = EnumEmbedderTypes.contentvec
+        elif slot.embedder == EnumEmbedderTypes.hubert_jp.value:
+            slot.embedder = EnumEmbedderTypes.hubert_jp
+        else:
+            raise RuntimeError("[Voice Changer][setInfoByONNX] unknown embedder")
+
     slot.samplingRate = cpt["config"][-1]
 
     del cpt
@@ -63,9 +72,18 @@ def _setInfoByONNX(slot: ModelSlot, file: str):
 
         slot.modelType = metadata["modelType"]
         slot.embChannels = metadata["embChannels"]
-        slot.embedder = (
-            metadata["embedder"] if "embedder" in metadata else EnumEmbedderTypes.hubert
-        )
+
+        if "embedder" not in metadata:
+            slot.embedder = EnumEmbedderTypes.hubert
+        elif metadata["embedder"] == EnumEmbedderTypes.hubert.value:
+            slot.embedder = EnumEmbedderTypes.hubert
+        elif metadata["embedder"] == EnumEmbedderTypes.contentvec.value:
+            slot.embedder = EnumEmbedderTypes.contentvec
+        elif metadata["embedder"] == EnumEmbedderTypes.hubert_jp.value:
+            slot.embedder = EnumEmbedderTypes.hubert_jp
+        else:
+            raise RuntimeError("[Voice Changer][setInfoByONNX] unknown embedder")
+
         slot.f0 = metadata["f0"]
         slot.modelType = (
             EnumInferenceTypes.onnxRVC if slot.f0 else EnumInferenceTypes.onnxRVCNono
@@ -73,7 +91,7 @@ def _setInfoByONNX(slot: ModelSlot, file: str):
         slot.samplingRate = metadata["samplingRate"]
         slot.deprecated = False
 
-    except:
+    except Exception as e:
         slot.modelType = EnumInferenceTypes.onnxRVC
         slot.embChannels = 256
         slot.embedder = EnumEmbedderTypes.hubert
@@ -81,6 +99,7 @@ def _setInfoByONNX(slot: ModelSlot, file: str):
         slot.samplingRate = 48000
         slot.deprecated = True
 
+        print("[Voice Changer] setInfoByONNX", e)
         print("[Voice Changer] ############## !!!! CAUTION !!!! ####################")
         print("[Voice Changer] This onnxfie is depricated. Please regenerate onnxfile.")
         print("[Voice Changer] ############## !!!! CAUTION !!!! ####################")
diff --git a/server/voice_changer/RVC/RVC.py b/server/voice_changer/RVC/RVC.py
index 5ee10a99..b0c13c41 100644
--- a/server/voice_changer/RVC/RVC.py
+++ b/server/voice_changer/RVC/RVC.py
@@ -1,5 +1,6 @@
 import sys
 import os
+from voice_changer.RVC.ModelSlot import ModelSlot
 from voice_changer.RVC.deviceManager.DeviceManager import DeviceManager
 
 from voice_changer.RVC.pitchExtractor.PitchExtractor import PitchExtractor
@@ -22,7 +23,6 @@ import resampy
 from voice_changer.RVC.MergeModel import merge_model
 from voice_changer.RVC.MergeModelRequest import MergeModelRequest
 from voice_changer.RVC.ModelSlotGenerator import generateModelSlot
-from Exceptions import NoModeLoadedException
 from voice_changer.RVC.RVCSettings import RVCSettings
 from voice_changer.RVC.embedder.Embedder import Embedder
 from voice_changer.RVC.embedder.EmbedderManager import EmbedderManager
@@ -42,7 +42,7 @@ import torch
 import traceback
 import faiss
 
-from const import TMP_DIR, UPLOAD_DIR
+from const import TMP_DIR, UPLOAD_DIR, EnumEmbedderTypes
 
 
 from voice_changer.RVC.custom_vc_infer_pipeline import VC
@@ -56,34 +56,29 @@ providers = [
 
 
 class RVC:
-    audio_buffer: AudioInOut | None = None
+    initialLoad: bool = True
+    settings: RVCSettings = RVCSettings()
+
     embedder: Embedder | None = None
     inferencer: Inferencer | None = None
+
     pitchExtractor: PitchExtractor | None = None
     deviceManager = DeviceManager.get_instance()
 
+    audio_buffer: AudioInOut | None = None
+    prevVol: float = 0
+    params: VoiceChangerParams
+    currentSlot: int = -1
+    needSwitch: bool = False
+
     def __init__(self, params: VoiceChangerParams):
-        self.initialLoad = True
-        self.settings = RVCSettings()
         self.pitchExtractor = PitchExtractorManager.getPitchExtractor(
             self.settings.f0Detector
         )
-
-        self.feature_file = None
-        self.index_file = None
-
-        self.prevVol = 0
         self.params = params
-
-        self.currentSlot = -1
         print("RVC initialization: ", params)
 
     def loadModel(self, props: LoadModelParams):
-        """
-        loadModelはスロットへのエントリ(推論向けにはロードしない)。
-        例外的に、まだ一つも推論向けにロードされていない場合と稼働中スロットの場合は、ロードする。
-        """
-        self.is_half = props.isHalf
         target_slot_idx = props.slot
         params_str = props.params
         params = json.loads(params_str)
@@ -94,167 +89,175 @@ class RVC:
             f"[Voice Changer] RVC new model is uploaded,{target_slot_idx}",
             asdict(modelSlot),
         )
+        """
+        [Voice Changer] RVC new model is uploaded,0 {'pyTorchModelFile': 'upload_dir/0/kurage.pth', 'onnxModelFile': None, 'featureFile': None, 'indexFile': None, 'defaultTrans': 16, 'isONNX': False, 'modelType': <EnumInferenceTypes.pyTorchWebUI: 'pyTorchWebUI'>, 'samplingRate': 48000, 'f0': True, 'embChannels': 768, 'deprecated': False, 'embedder': 'hubert-base-japanese'}        
+        """
 
         # 初回のみロード
-        if self.initialLoad or target_slot_idx == self.currentSlot:
+        if self.initialLoad:
             self.prepareModel(target_slot_idx)
             self.settings.modelSlotIndex = target_slot_idx
-            # self.currentSlot = self.settings.modelSlotIndex
             self.switchModel()
             self.initialLoad = False
+        elif target_slot_idx == self.currentSlot:
+            self.prepareModel(target_slot_idx)
+            self.needSwitch = True
 
         return self.get_info()
 
-    # def _getDevice(self):
-    #     if self.settings.gpu < 0 or (self.gpu_num == 0 and self.mps_enabled is False):
-    #         dev = torch.device("cpu")
-    #     elif self.mps_enabled:
-    #         dev = torch.device("mps")
-    #     else:
-    #         dev = torch.device("cuda", index=self.settings.gpu)
-    #     return dev
+    def createPipeline(self, modelSlot: ModelSlot):
+        dev = self.deviceManager.getDevice(self.settings.gpu)
+        half = self.deviceManager.halfPrecisionAvailable(self.settings.gpu)
+        # ファイル名特定(Inferencer)
+        inferencerFilename = (
+            modelSlot.onnxModelFile if modelSlot.isONNX else modelSlot.pyTorchModelFile
+        )
+        # ファイル名特定(embedder)
+        if modelSlot.embedder == EnumEmbedderTypes.hubert:
+            emmbedderFilename = self.params.hubert_base
+        elif modelSlot.embedder == EnumEmbedderTypes.contentvec:
+            emmbedderFilename = self.params.content_vec_500
+        elif modelSlot.embedder == EnumEmbedderTypes.hubert_jp:
+            emmbedderFilename = self.params.hubert_base_jp
+        else:
+            raise RuntimeError(
+                "[Voice Changer] Exception loading embedder failed. unknwon type:",
+                modelSlot.embedder,
+            )
+
+        # Inferencer 生成
+        try:
+            inferencer = InferencerManager.getInferencer(
+                modelSlot.modelType,
+                inferencerFilename,
+                half,
+                dev,
+            )
+        except Exception as e:
+            print("[Voice Changer] exception! loading inferencer", e)
+            traceback.print_exc()
+
+        # Embedder 生成
+        try:
+            print("AFASFDAFDAFDASDFASDFSADFASDFA", half, self.settings.gpu)
+            embedder = EmbedderManager.getEmbedder(
+                modelSlot.embedder,
+                emmbedderFilename,
+                half,
+                dev,
+            )
+        except Exception as e:
+            print("[Voice Changer]  exception! loading embedder", e)
+            traceback.print_exc()
+
+        return inferencer, embedder
+
+    def loadIndex(self, modelSlot: ModelSlot):
+        # Indexのロード
+        print("[Voice Changer] Loading index...")
+        # ファイル指定がない場合はNone
+        if modelSlot.featureFile is None or modelSlot.indexFile is None:
+            return None, None
+
+        # ファイル指定があってもファイルがない場合はNone
+        if (
+            os.path.exists(modelSlot.featureFile) is not True
+            or os.path.exists(modelSlot.indexFile) is not True
+        ):
+            return None, None
+
+        try:
+            index = faiss.read_index(modelSlot.indexFile)
+            feature = np.load(modelSlot.featureFile)
+        except:
+            print("[Voice Changer] load index failed. Use no index.")
+            traceback.print_exc()
+            return None, None
+
+        return index, feature
 
     def prepareModel(self, slot: int):
         if slot < 0:
             return self.get_info()
         print("[Voice Changer] Prepare Model of slot:", slot)
         modelSlot = self.settings.modelSlots[slot]
-        filename = (
-            modelSlot.onnxModelFile if modelSlot.isONNX else modelSlot.pyTorchModelFile
-        )
-        dev = self.deviceManager.getDevice(self.settings.gpu)
 
-        # Inferencerのロード
-        inferencer = InferencerManager.getInferencer(
-            modelSlot.modelType,
-            filename,
-            self.settings.isHalf,
-            dev,
-        )
+        # Inferencer, embedderのロード
+        inferencer, embedder = self.createPipeline(modelSlot)
+
         self.next_inferencer = inferencer
+        self.next_embedder = embedder
 
         # Indexのロード
-        print("[Voice Changer] Loading index...")
-        if modelSlot.featureFile is not None and modelSlot.indexFile is not None:
-            if (
-                os.path.exists(modelSlot.featureFile) is True
-                and os.path.exists(modelSlot.indexFile) is True
-            ):
-                try:
-                    self.next_index = faiss.read_index(modelSlot.indexFile)
-                    self.next_feature = np.load(modelSlot.featureFile)
-                except:
-                    print("[Voice Changer] load index failed. Use no index.")
-                    traceback.print_exc()
-                    self.next_index = self.next_feature = None
-            else:
-                print("[Voice Changer] Index file is not found. Use no index.")
-                self.next_index = self.next_feature = None
-        else:
-            self.next_index = self.next_feature = None
+        index, feature = self.loadIndex(modelSlot)
+        self.next_index = index
+        self.next_feature = feature
 
+        # その他の設定
         self.next_trans = modelSlot.defaultTrans
         self.next_samplingRate = modelSlot.samplingRate
-        self.next_embedder = modelSlot.embedder
         self.next_framework = "ONNX" if modelSlot.isONNX else "PyTorch"
+        self.needSwitch = True
         print("[Voice Changer] Prepare done.")
         return self.get_info()
 
     def switchModel(self):
         print("[Voice Changer] Switching model..")
-        dev = self.deviceManager.getDevice(self.settings.gpu)
-
-        # embedderはモデルによらず再利用できる可能性が高いので、Switchのタイミングでこちらで取得
-        try:
-            self.embedder = EmbedderManager.getEmbedder(
-                self.next_embedder,
-                self.params.hubert_base,
-                True,
-                dev,
-            )
-        except Exception as e:
-            print("[Voice Changer] load hubert error", e)
-            traceback.print_exc()
-
+        self.embedder = self.next_embedder
         self.inferencer = self.next_inferencer
         self.feature = self.next_feature
         self.index = self.next_index
         self.settings.tran = self.next_trans
-        self.settings.framework = self.next_framework
         self.settings.modelSamplingRate = self.next_samplingRate
+        self.settings.framework = self.next_framework
 
-        self.next_net_g = None
-        self.next_onnx_session = None
         print(
             "[Voice Changer] Switching model..done",
         )
 
     def update_settings(self, key: str, val: int | float | str):
-        # if key == "onnxExecutionProvider" and self.onnx_session is not None:
-        #     if val == "CUDAExecutionProvider":
-        #         if self.settings.gpu < 0 or self.settings.gpu >= self.gpu_num:
-        #             self.settings.gpu = 0
-        #         provider_options = [{"device_id": self.settings.gpu}]
-        #         self.onnx_session.set_providers(
-        #             providers=[val], provider_options=provider_options
-        #         )
-        #         if hasattr(self, "hubert_onnx"):
-        #             self.hubert_onnx.set_providers(
-        #                 providers=[val], provider_options=provider_options
-        #             )
-        #     else:
-        #         self.onnx_session.set_providers(providers=[val])
-        #         if hasattr(self, "hubert_onnx"):
-        #             self.hubert_onnx.set_providers(providers=[val])
-        # elif key == "onnxExecutionProvider" and self.onnx_session is None:
-        #     print("Onnx is not enabled. Please load model.")
-        #     return False
         if key in self.settings.intData:
+            # 設定前処理
             val = cast(int, val)
-            # if (
-            #     key == "gpu"
-            #     and val >= 0
-            #     and val < self.gpu_num
-            #     and self.onnx_session is not None
-            # ):
-            #     providers = self.onnx_session.get_providers()
-            #     print("Providers:", providers)
-            #     if "CUDAExecutionProvider" in providers:
-            #         provider_options = [{"device_id": self.settings.gpu}]
-            #         self.onnx_session.set_providers(
-            #             providers=["CUDAExecutionProvider"],
-            #             provider_options=provider_options,
-            #         )
             if key == "modelSlotIndex":
-                if int(val) < 0:
+                if val < 0:
                     return True
-                # self.switchModel(int(val))
-                val = int(val) % 1000  # Quick hack for same slot is selected
+                val = val % 1000  # Quick hack for same slot is selected
                 self.prepareModel(val)
-                self.currentSlot = -1
-            setattr(self.settings, key, int(val))
+                self.needSwitch = True
+
+            # 設定
+            setattr(self.settings, key, val)
+
+            if key == "gpu" and self.embedder is not None:
+                dev = self.deviceManager.getDevice(val)
+                half = self.deviceManager.halfPrecisionAvailable(val)
+
+                # half-precisionの使用可否が変わるときは作り直し
+                if (
+                    self.inferencer is not None
+                    and self.inferencer.isHalf == half
+                    and self.embedder.isHalf == half
+                ):
+                    print(
+                        "NOT NEED CHAGE TO NEW PIPELINE!!!!!!!!!!!!!!!!!!!!!!!!!!!",
+                        half,
+                    )
+                    self.embedder.setDevice(dev)
+                    self.inferencer.setDevice(dev)
+                else:
+                    print("CHAGE TO NEW PIPELINE!!!!!!!!!!!!!!!!!!!!!!!!!!!", half)
+                    self.prepareModel(self.settings.modelSlotIndex)
         elif key in self.settings.floatData:
             setattr(self.settings, key, float(val))
         elif key in self.settings.strData:
             setattr(self.settings, key, str(val))
         else:
             return False
-
         return True
 
     def get_info(self):
         data = asdict(self.settings)
-
-        # data["onnxExecutionProviders"] = (
-        #     self.onnx_session.get_providers() if self.onnx_session is not None else []
-        # )
-        files = ["configFile", "pyTorchModelFile", "onnxModelFile"]
-        for f in files:
-            if data[f] is not None and os.path.exists(data[f]):
-                data[f] = os.path.basename(data[f])
-            else:
-                data[f] = ""
-
         return data
 
     def get_processing_sampling_rate(self):
@@ -295,118 +298,6 @@ class RVC:
 
         return (self.audio_buffer, convertSize, vol)
 
-    def _onnx_inference(self, data):
-        if hasattr(self, "onnx_session") is False or self.onnx_session is None:
-            print("[Voice Changer] No onnx session.")
-            raise NoModeLoadedException("ONNX")
-
-        if self.settings.gpu < 0 or self.gpu_num == 0:
-            dev = torch.device("cpu")
-        else:
-            dev = torch.device("cuda", index=self.settings.gpu)
-
-        # self.hubert_model = self.hubert_model.to(dev)
-        self.embedder = self.embedder.to(dev)
-
-        audio = data[0]
-        convertSize = data[1]
-        vol = data[2]
-
-        audio = resampy.resample(audio, self.settings.modelSamplingRate, 16000)
-
-        if vol < self.settings.silentThreshold:
-            return np.zeros(convertSize).astype(np.int16)
-
-        with torch.no_grad():
-            repeat = 3 if self.is_half else 1
-            repeat *= self.settings.rvcQuality  # 0 or 3
-            vc = VC(
-                self.settings.modelSamplingRate,
-                torch.device("cuda:0"),
-                self.is_half,
-                repeat,
-            )
-            sid = 0
-            f0_up_key = self.settings.tran
-            f0_method = self.settings.f0Detector
-            index_rate = self.settings.indexRatio
-            if_f0 = 1 if self.settings.modelSlots[self.currentSlot].f0 else 0
-
-            embChannels = self.settings.modelSlots[self.currentSlot].embChannels
-            audio_out = vc.pipeline(
-                # self.hubert_model,
-                self.embedder,
-                self.onnx_session,
-                self.pitchExtractor,
-                sid,
-                audio,
-                f0_up_key,
-                f0_method,
-                self.index,
-                self.feature,
-                index_rate,
-                if_f0,
-                silence_front=self.settings.extraConvertSize
-                / self.settings.modelSamplingRate,
-                embChannels=embChannels,
-            )
-            result = audio_out * np.sqrt(vol)
-
-        return result
-
-    def _pyTorch_inference(self, data):
-        # if hasattr(self, "net_g") is False or self.net_g is None:
-        #     print(
-        #         "[Voice Changer] No pyTorch session.",
-        #         hasattr(self, "net_g"),
-        #         self.net_g,
-        #     )
-        #     raise NoModeLoadedException("pytorch")
-
-        dev = self.deviceManager.getDevice(self.settings.gpu)
-        self.embedder = self.embedder.to(dev)
-        self.inferencer = self.inferencer.to(dev)
-
-        audio = data[0]
-        convertSize = data[1]
-        vol = data[2]
-
-        audio = resampy.resample(audio, self.settings.modelSamplingRate, 16000)
-
-        if vol < self.settings.silentThreshold:
-            return np.zeros(convertSize).astype(np.int16)
-
-        repeat = 3 if self.is_half else 1
-        repeat *= self.settings.rvcQuality  # 0 or 3
-        vc = VC(self.settings.modelSamplingRate, dev, self.is_half, repeat)
-        sid = 0
-        f0_up_key = self.settings.tran
-        f0_method = self.settings.f0Detector
-        index_rate = self.settings.indexRatio
-        if_f0 = 1 if self.settings.modelSlots[self.currentSlot].f0 else 0
-
-        embChannels = self.settings.modelSlots[self.currentSlot].embChannels
-        audio_out = vc.pipeline(
-            self.embedder,
-            self.inferencer,
-            self.pitchExtractor,
-            sid,
-            audio,
-            f0_up_key,
-            f0_method,
-            self.index,
-            self.feature,
-            index_rate,
-            if_f0,
-            silence_front=self.settings.extraConvertSize
-            / self.settings.modelSamplingRate,
-            embChannels=embChannels,
-        )
-
-        result = audio_out * np.sqrt(vol)
-
-        return result
-
     def inference(self, data):
         if self.settings.modelSlotIndex < 0:
             print(
@@ -415,15 +306,17 @@ class RVC:
                 self.currentSlot,
             )
             raise NoModeLoadedException("model_common")
-
-        if self.currentSlot != self.settings.modelSlotIndex:
+        if self.needSwitch:
             print(f"Switch model {self.currentSlot} -> {self.settings.modelSlotIndex}")
             self.currentSlot = self.settings.modelSlotIndex
             self.switchModel()
+            self.needSwitch = False
 
         dev = self.deviceManager.getDevice(self.settings.gpu)
-        self.embedder = self.embedder.to(dev)
-        self.inferencer = self.inferencer.to(dev)
+        half = self.deviceManager.halfPrecisionAvailable(self.settings.gpu)
+
+        # self.embedder = self.embedder.setDevice(dev)
+        # self.inferencer = self.inferencer.setDevice(dev)
 
         audio = data[0]
         convertSize = data[1]
@@ -434,16 +327,16 @@ class RVC:
         if vol < self.settings.silentThreshold:
             return np.zeros(convertSize).astype(np.int16)
 
-        repeat = 3 if self.is_half else 1
+        repeat = 3 if half else 1
         repeat *= self.settings.rvcQuality  # 0 or 3
-        vc = VC(self.settings.modelSamplingRate, dev, self.is_half, repeat)
+        vc = VC(self.settings.modelSamplingRate, dev, half, repeat)
         sid = 0
         f0_up_key = self.settings.tran
-        f0_method = self.settings.f0Detector
         index_rate = self.settings.indexRatio
         if_f0 = 1 if self.settings.modelSlots[self.currentSlot].f0 else 0
 
         embChannels = self.settings.modelSlots[self.currentSlot].embChannels
+
         audio_out = vc.pipeline(
             self.embedder,
             self.inferencer,
@@ -451,7 +344,6 @@ class RVC:
             sid,
             audio,
             f0_up_key,
-            f0_method,
             self.index,
             self.feature,
             index_rate,
diff --git a/server/voice_changer/RVC/RVCSettings.py b/server/voice_changer/RVC/RVCSettings.py
index 2bc269c7..b2cc2157 100644
--- a/server/voice_changer/RVC/RVCSettings.py
+++ b/server/voice_changer/RVC/RVCSettings.py
@@ -15,9 +15,6 @@ class RVCSettings:
     clusterInferRatio: float = 0.1
 
     framework: str = "PyTorch"  # PyTorch or ONNX
-    pyTorchModelFile: str = ""
-    onnxModelFile: str = ""
-    configFile: str = ""
     modelSlots: list[ModelSlot] = field(
         default_factory=lambda: [ModelSlot(), ModelSlot(), ModelSlot(), ModelSlot()]
     )
diff --git a/server/voice_changer/RVC/RinnaHubertBase.py b/server/voice_changer/RVC/RinnaHubertBase.py
deleted file mode 100644
index 451d5769..00000000
--- a/server/voice_changer/RVC/RinnaHubertBase.py
+++ /dev/null
@@ -1,13 +0,0 @@
-import torch
-from transformers import HubertModel
-from voice_changer.utils.VoiceChangerModel import AudioInOut
-
-
-class RinnaHubertBase:
-    def __init__(self):
-        model = HubertModel.from_pretrained("rinna/japanese-hubert-base")
-        model.eval()
-        self.model = model
-
-    def extract(self, audio: AudioInOut):
-        return self.model(audio)
diff --git a/server/voice_changer/RVC/custom_vc_infer_pipeline.py b/server/voice_changer/RVC/custom_vc_infer_pipeline.py
index 88fdc8e6..70a7da49 100644
--- a/server/voice_changer/RVC/custom_vc_infer_pipeline.py
+++ b/server/voice_changer/RVC/custom_vc_infer_pipeline.py
@@ -3,6 +3,7 @@ import numpy as np
 # import parselmouth
 import torch
 import torch.nn.functional as F
+from Exceptions import HalfPrecisionChangingException
 
 from voice_changer.RVC.embedder.Embedder import Embedder
 from voice_changer.RVC.inferencer.Inferencer import Inferencer
@@ -26,7 +27,6 @@ class VC(object):
         sid,
         audio,
         f0_up_key,
-        f0_method,
         index,
         big_npy,
         index_rate,
@@ -68,7 +68,13 @@ class VC(object):
 
         # embedding
         padding_mask = torch.BoolTensor(feats.shape).to(self.device).fill_(False)
-        feats = embedder.extractFeatures(feats, embChannels)
+        try:
+            feats = embedder.extractFeatures(feats, embChannels)
+        except RuntimeError as e:
+            if "HALF" in e.__str__().upper():
+                raise HalfPrecisionChangingException()
+            else:
+                raise e
 
         # Index - feature抽出
         if (
@@ -103,34 +109,46 @@ class VC(object):
 
         # 推論実行
         with torch.no_grad():
-            if pitch is not None:
-                audio1 = (
-                    (
-                        inferencer.infer(feats, p_len, pitch, pitchf, sid)[0][0, 0]
-                        * 32768
-                    )
-                    .data.cpu()
-                    .float()
-                    .numpy()
-                    .astype(np.int16)
-                )
-            else:
-                if hasattr(inferencer, "infer_pitchless"):
-                    audio1 = (
-                        (inferencer.infer_pitchless(feats, p_len, sid)[0][0, 0] * 32768)
-                        .data.cpu()
-                        .float()
-                        .numpy()
-                        .astype(np.int16)
-                    )
-                else:
-                    audio1 = (
-                        (inferencer.infer(feats, p_len, sid)[0][0, 0] * 32768)
-                        .data.cpu()
-                        .float()
-                        .numpy()
-                        .astype(np.int16)
-                    )
+            audio1 = (
+                (inferencer.infer(feats, p_len, pitch, pitchf, sid)[0][0, 0] * 32768)
+                .data.cpu()
+                .float()
+                .numpy()
+                .astype(np.int16)
+            )
+
+            # if pitch is not None:
+            #     print("INFERENCE 1 ")
+            #     audio1 = (
+            #         (
+            #             inferencer.infer(feats, p_len, pitch, pitchf, sid)[0][0, 0]
+            #             * 32768
+            #         )
+            #         .data.cpu()
+            #         .float()
+            #         .numpy()
+            #         .astype(np.int16)
+            #     )
+            # else:
+            #     if hasattr(inferencer, "infer_pitchless"):
+            #         print("INFERENCE 2 ")
+
+            #         audio1 = (
+            #             (inferencer.infer_pitchless(feats, p_len, sid)[0][0, 0] * 32768)
+            #             .data.cpu()
+            #             .float()
+            #             .numpy()
+            #             .astype(np.int16)
+            #         )
+            #     else:
+            #         print("INFERENCE 3 ")
+            #         audio1 = (
+            #             (inferencer.infer(feats, p_len, sid)[0][0, 0] * 32768)
+            #             .data.cpu()
+            #             .float()
+            #             .numpy()
+            #             .astype(np.int16)
+            #         )
 
         del feats, p_len, padding_mask
         torch.cuda.empty_cache()
diff --git a/server/voice_changer/RVC/deviceManager/DeviceManager.py b/server/voice_changer/RVC/deviceManager/DeviceManager.py
index 901c5dff..abfb4386 100644
--- a/server/voice_changer/RVC/deviceManager/DeviceManager.py
+++ b/server/voice_changer/RVC/deviceManager/DeviceManager.py
@@ -29,6 +29,9 @@ class DeviceManager(object):
     def halfPrecisionAvailable(self, id: int):
         if self.gpu_num == 0:
             return False
+        if id < 0:
+            return False
+
         gpuName = torch.cuda.get_device_name(id).upper()
 
         # original: https://github.com/RVC-Project/Retrieval-based-Voice-Conversion-WebUI/blob/main/config.py
@@ -39,3 +42,5 @@ class DeviceManager(object):
             or "1080" in gpuName
         ):
             return False
+
+        return True
diff --git a/server/voice_changer/RVC/embedder/Embedder.py b/server/voice_changer/RVC/embedder/Embedder.py
index 5fa36ce6..728f1e7a 100644
--- a/server/voice_changer/RVC/embedder/Embedder.py
+++ b/server/voice_changer/RVC/embedder/Embedder.py
@@ -36,11 +36,14 @@ class Embedder(Protocol):
         self.isHalf = isHalf
         if self.model is not None and isHalf:
             self.model = self.model.half()
+        elif self.model is not None and isHalf is False:
+            self.model = self.model.float()
 
     def setDevice(self, dev: device):
         self.dev = dev
         if self.model is not None:
             self.model = self.model.to(self.dev)
+        return self
 
     def matchCondition(self, embedderType: EnumEmbedderTypes, file: str) -> bool:
         # Check Type
@@ -63,11 +66,3 @@ class Embedder(Protocol):
 
         else:
             return True
-
-    def to(self, dev: torch.device):
-        if self.model is not None:
-            self.model = self.model.to(dev)
-        return self
-
-    def printDevice(self):
-        print("embedder device:", self.model.device)
diff --git a/server/voice_changer/RVC/embedder/EmbedderManager.py b/server/voice_changer/RVC/embedder/EmbedderManager.py
index 729b84cb..b6d6d100 100644
--- a/server/voice_changer/RVC/embedder/EmbedderManager.py
+++ b/server/voice_changer/RVC/embedder/EmbedderManager.py
@@ -23,6 +23,8 @@ class EmbedderManager:
         else:
             cls.currentEmbedder.setDevice(dev)
             cls.currentEmbedder.setHalf(isHalf)
+            # print("[Voice Changer] generate new embedder. (ANYWAY)", isHalf)
+            # cls.currentEmbedder = cls.loadEmbedder(embederType, file, isHalf, dev)
         return cls.currentEmbedder
 
     @classmethod
diff --git a/server/voice_changer/RVC/inferencer/Inferencer.py b/server/voice_changer/RVC/inferencer/Inferencer.py
index 960f98c2..46738dc5 100644
--- a/server/voice_changer/RVC/inferencer/Inferencer.py
+++ b/server/voice_changer/RVC/inferencer/Inferencer.py
@@ -4,6 +4,7 @@ import torch
 from torch import device
 
 from const import EnumInferenceTypes
+import onnxruntime
 
 
 class Inferencer(Protocol):
@@ -12,7 +13,7 @@ class Inferencer(Protocol):
     isHalf: bool = True
     dev: device
 
-    model: Any | None = None
+    model: onnxruntime.InferenceSession | Any | None = None
 
     def loadModel(self, file: str, dev: device, isHalf: bool = True):
         ...
@@ -43,16 +44,11 @@ class Inferencer(Protocol):
         self.isHalf = isHalf
         if self.model is not None and isHalf:
             self.model = self.model.half()
+        elif self.model is not None and isHalf is False:
+            self.model = self.model.float()
 
     def setDevice(self, dev: device):
         self.dev = dev
         if self.model is not None:
             self.model = self.model.to(self.dev)
-
-    def to(self, dev: torch.device):
-        if self.model is not None:
-            self.model = self.model.to(dev)
         return self
-
-    def printDevice(self):
-        print("inferencer device:", self.model.device)
diff --git a/server/voice_changer/RVC/inferencer/InferencerManager.py b/server/voice_changer/RVC/inferencer/InferencerManager.py
index 12daabe6..f59c69ee 100644
--- a/server/voice_changer/RVC/inferencer/InferencerManager.py
+++ b/server/voice_changer/RVC/inferencer/InferencerManager.py
@@ -2,8 +2,8 @@ from torch import device
 
 from const import EnumInferenceTypes
 from voice_changer.RVC.inferencer.Inferencer import Inferencer
-from voice_changer.RVC.inferencer.OnnxRVCInferencer import OnnxRVCInference
-from voice_changer.RVC.inferencer.OnnxRVCInferencerNono import OnnxRVCInferenceNono
+from voice_changer.RVC.inferencer.OnnxRVCInferencer import OnnxRVCInferencer
+from voice_changer.RVC.inferencer.OnnxRVCInferencerNono import OnnxRVCInferencerNono
 from voice_changer.RVC.inferencer.RVCInferencer import RVCInferencer
 from voice_changer.RVC.inferencer.RVCInferencerNono import RVCInferencerNono
 from voice_changer.RVC.inferencer.WebUIInferencer import WebUIInferencer
@@ -48,11 +48,11 @@ class InferencerManager:
             inferencerType == EnumInferenceTypes.onnxRVC
             or inferencerType == EnumInferenceTypes.onnxRVC.value
         ):
-            return OnnxRVCInference().loadModel(file, dev, isHalf)
+            return OnnxRVCInferencer().loadModel(file, dev, isHalf)
         elif (
             inferencerType == EnumInferenceTypes.onnxRVCNono
             or inferencerType == EnumInferenceTypes.onnxRVCNono.value
         ):
-            return OnnxRVCInferenceNono().loadModel(file, dev, isHalf)
+            return OnnxRVCInferencerNono().loadModel(file, dev, isHalf)
         else:
             raise RuntimeError("[Voice Changer] Inferencer not found", inferencerType)
diff --git a/server/voice_changer/RVC/inferencer/OnnxRVCInferencer.py b/server/voice_changer/RVC/inferencer/OnnxRVCInferencer.py
index eb9df727..91873b89 100644
--- a/server/voice_changer/RVC/inferencer/OnnxRVCInferencer.py
+++ b/server/voice_changer/RVC/inferencer/OnnxRVCInferencer.py
@@ -8,18 +8,16 @@ import numpy as np
 providers = ["CPUExecutionProvider"]
 
 
-class OnnxRVCInference(Inferencer):
+class OnnxRVCInferencer(Inferencer):
     def loadModel(self, file: str, dev: device, isHalf: bool = True):
         super().setProps(EnumInferenceTypes.onnxRVC, file, dev, isHalf)
         # ort_options = onnxruntime.SessionOptions()
         # ort_options.intra_op_num_threads = 8
 
-        onnx_session = onnxruntime.InferenceSession(
-            self.onnx_model, providers=providers
-        )
+        onnx_session = onnxruntime.InferenceSession(file, providers=providers)
 
         # check half-precision
-        first_input_type = self.onnx_session.get_inputs()[0].type
+        first_input_type = onnx_session.get_inputs()[0].type
         if first_input_type == "tensor(float)":
             self.isHalf = False
         else:
@@ -32,13 +30,16 @@ class OnnxRVCInference(Inferencer):
         self,
         feats: torch.Tensor,
         pitch_length: torch.Tensor,
-        pitch: torch.Tensor | None,
-        pitchf: torch.Tensor | None,
+        pitch: torch.Tensor,
+        pitchf: torch.Tensor,
         sid: torch.Tensor,
     ) -> torch.Tensor:
         if pitch is None or pitchf is None:
             raise RuntimeError("[Voice Changer] Pitch or Pitchf is not found.")
 
+        print("INFER1", self.model.get_providers())
+        print("INFER2", self.model.get_provider_options())
+        print("INFER3", self.model.get_session_options())
         if self.isHalf:
             audio1 = self.model.run(
                 ["audio"],
@@ -65,14 +66,22 @@ class OnnxRVCInference(Inferencer):
         return torch.tensor(np.array(audio1))
 
     def setHalf(self, isHalf: bool):
-        raise RuntimeError("half-precision is not changable.", self.isHalf)
+        self.isHalf = isHalf
+        pass
+        # raise RuntimeError("half-precision is not changable.", self.isHalf)
 
     def setDevice(self, dev: device):
-        self.dev = dev
-        if self.model is not None:
-            self.model = self.model.to(self.dev)
+        index = dev.index
+        type = dev.type
+        if type == "cpu":
+            self.model.set_providers(providers=["CPUExecutionProvider"])
+        elif type == "cuda":
+            provider_options = [{"device_id": index}]
+            self.model.set_providers(
+                providers=["CUDAExecutionProvider"],
+                provider_options=provider_options,
+            )
+        else:
+            self.model.set_providers(providers=["CPUExecutionProvider"])
 
-    def to(self, dev: torch.device):
-        if self.model is not None:
-            self.model = self.model.to(dev)
         return self
diff --git a/server/voice_changer/RVC/inferencer/OnnxRVCInferencerNono.py b/server/voice_changer/RVC/inferencer/OnnxRVCInferencerNono.py
index 67a673c4..4254b6d2 100644
--- a/server/voice_changer/RVC/inferencer/OnnxRVCInferencerNono.py
+++ b/server/voice_changer/RVC/inferencer/OnnxRVCInferencerNono.py
@@ -2,13 +2,14 @@ import torch
 from torch import device
 import onnxruntime
 from const import EnumInferenceTypes
-from voice_changer.RVC.inferencer.Inferencer import Inferencer
 import numpy as np
 
+from voice_changer.RVC.inferencer.OnnxRVCInferencer import OnnxRVCInferencer
+
 providers = ["CPUExecutionProvider"]
 
 
-class OnnxRVCInferenceNono(Inferencer):
+class OnnxRVCInferencerNono(OnnxRVCInferencer):
     def loadModel(self, file: str, dev: device, isHalf: bool = True):
         super().setProps(EnumInferenceTypes.onnxRVC, file, dev, isHalf)
         # ort_options = onnxruntime.SessionOptions()
@@ -56,16 +57,3 @@ class OnnxRVCInferenceNono(Inferencer):
             )
 
         return torch.tensor(np.array(audio1))
-
-    def setHalf(self, isHalf: bool):
-        raise RuntimeError("half-precision is not changable.", self.isHalf)
-
-    def setDevice(self, dev: device):
-        self.dev = dev
-        if self.model is not None:
-            self.model = self.model.to(self.dev)
-
-    def to(self, dev: torch.device):
-        if self.model is not None:
-            self.model = self.model.to(dev)
-        return self
diff --git a/server/voice_changer/RVC/inferencer/RVCInferencer.py b/server/voice_changer/RVC/inferencer/RVCInferencer.py
index 7f6f5c9d..91bbf636 100644
--- a/server/voice_changer/RVC/inferencer/RVCInferencer.py
+++ b/server/voice_changer/RVC/inferencer/RVCInferencer.py
@@ -16,6 +16,8 @@ class RVCInferencer(Inferencer):
 
         model.eval()
         model.load_state_dict(cpt["weight"], strict=False)
+
+        model = model.to(dev)
         if isHalf:
             model = model.half()
 
@@ -26,8 +28,8 @@ class RVCInferencer(Inferencer):
         self,
         feats: torch.Tensor,
         pitch_length: torch.Tensor,
-        pitch: torch.Tensor | None,
-        pitchf: torch.Tensor | None,
+        pitch: torch.Tensor,
+        pitchf: torch.Tensor,
         sid: torch.Tensor,
     ) -> torch.Tensor:
         return self.model.infer(feats, pitch_length, pitch, pitchf, sid)
diff --git a/server/voice_changer/RVC/inferencer/RVCInferencerNono.py b/server/voice_changer/RVC/inferencer/RVCInferencerNono.py
index 97a9c429..f84d9c3b 100644
--- a/server/voice_changer/RVC/inferencer/RVCInferencerNono.py
+++ b/server/voice_changer/RVC/inferencer/RVCInferencerNono.py
@@ -16,6 +16,8 @@ class RVCInferencerNono(Inferencer):
 
         model.eval()
         model.load_state_dict(cpt["weight"], strict=False)
+
+        model = model.to(dev)
         if isHalf:
             model = model.half()
 
diff --git a/server/voice_changer/RVC/inferencer/WebUIInferencer.py b/server/voice_changer/RVC/inferencer/WebUIInferencer.py
index 7945968d..a9d3b0a8 100644
--- a/server/voice_changer/RVC/inferencer/WebUIInferencer.py
+++ b/server/voice_changer/RVC/inferencer/WebUIInferencer.py
@@ -14,6 +14,8 @@ class WebUIInferencer(Inferencer):
 
         model.eval()
         model.load_state_dict(cpt["weight"], strict=False)
+
+        model = model.to(dev)
         if isHalf:
             model = model.half()
 
@@ -24,8 +26,8 @@ class WebUIInferencer(Inferencer):
         self,
         feats: torch.Tensor,
         pitch_length: torch.Tensor,
-        pitch: torch.Tensor | None,
-        pitchf: torch.Tensor | None,
+        pitch: torch.Tensor,
+        pitchf: torch.Tensor,
         sid: torch.Tensor,
     ) -> torch.Tensor:
         return self.model.infer(feats, pitch_length, pitch, pitchf, sid)
diff --git a/server/voice_changer/RVC/inferencer/WebUIInferencerNono.py b/server/voice_changer/RVC/inferencer/WebUIInferencerNono.py
index faa4c4c3..c17465cc 100644
--- a/server/voice_changer/RVC/inferencer/WebUIInferencerNono.py
+++ b/server/voice_changer/RVC/inferencer/WebUIInferencerNono.py
@@ -14,6 +14,8 @@ class WebUIInferencerNono(Inferencer):
 
         model.eval()
         model.load_state_dict(cpt["weight"], strict=False)
+
+        model = model.to(dev)
         if isHalf:
             model = model.half()
 
diff --git a/server/voice_changer/VoiceChanger.py b/server/voice_changer/VoiceChanger.py
index c82fea65..d00d3dc8 100755
--- a/server/voice_changer/VoiceChanger.py
+++ b/server/voice_changer/VoiceChanger.py
@@ -13,7 +13,11 @@ from voice_changer.utils.LoadModelParams import LoadModelParams
 
 from voice_changer.utils.Timer import Timer
 from voice_changer.utils.VoiceChangerModel import VoiceChangerModel, AudioInOut
-from Exceptions import NoModeLoadedException, ONNXInputArgumentException
+from Exceptions import (
+    HalfPrecisionChangingException,
+    NoModeLoadedException,
+    ONNXInputArgumentException,
+)
 from voice_changer.utils.VoiceChangerParams import VoiceChangerParams
 
 providers = [
@@ -341,6 +345,9 @@ class VoiceChanger:
         except ONNXInputArgumentException as e:
             print("[Voice Changer] [Exception]", e)
             return np.zeros(1).astype(np.int16), [0, 0, 0]
+        except HalfPrecisionChangingException as e:
+            print("[Voice Changer] Switching model configuration....", e)
+            return np.zeros(1).astype(np.int16), [0, 0, 0]
         except Exception as e:
             print("VC PROCESSING!!!! EXCEPTION!!!", e)
             print(traceback.format_exc())