diff --git a/ChatTTS/core.py b/ChatTTS/core.py
index c178a9ad2..28cebd92a 100644
--- a/ChatTTS/core.py
+++ b/ChatTTS/core.py
@@ -68,7 +68,7 @@ def download_models(
         custom_path: Optional[torch.serialization.FILE_LIKE] = None,
     ) -> Optional[str]:
         if source == "local":
-            download_path = os.getcwd()
+            download_path = custom_path if custom_path is not None else os.getcwd()
             if (
                 not check_all_assets(Path(download_path), self.sha256_map, update=True)
                 or force_redownload
@@ -83,10 +83,20 @@ def download_models(
                     )
                     return None
         elif source == "huggingface":
-            hf_home = os.getenv("HF_HOME", os.path.expanduser("~/.cache/huggingface"))
             try:
-                download_path = get_latest_modified_file(
-                    os.path.join(hf_home, "hub/models--2Noise--ChatTTS/snapshots")
+                download_path = (
+                    get_latest_modified_file(
+                        os.path.join(
+                            os.getenv(
+                                "HF_HOME", os.path.expanduser("~/.cache/huggingface")
+                            ),
+                            "hub/models--2Noise--ChatTTS/snapshots",
+                        )
+                    )
+                    if custom_path is None
+                    else get_latest_modified_file(
+                        os.path.join(custom_path, "models--2Noise--ChatTTS/snapshots")
+                    )
                 )
             except:
                 download_path = None
@@ -99,16 +109,16 @@ def download_models(
                     download_path = snapshot_download(
                         repo_id="2Noise/ChatTTS",
                         allow_patterns=["*.yaml", "*.json", "*.safetensors"],
+                        cache_dir=custom_path,
+                        force_download=force_redownload,
                     )
                 except:
                     download_path = None
-            else:
-                self.logger.log(
-                    logging.INFO, f"load latest snapshot from cache: {download_path}"
-                )
-            if download_path is None:
-                self.logger.error("download from huggingface failed.")
-                return None
+                else:
+                    self.logger.log(
+                        logging.INFO,
+                        f"load latest snapshot from cache: {download_path}",
+                    )
         elif source == "custom":
             self.logger.log(logging.INFO, f"try to load from local: {custom_path}")
             if not check_all_assets(Path(custom_path), self.sha256_map, update=False):
@@ -116,6 +126,10 @@ def download_models(
                 return None
             download_path = custom_path
 
+        if download_path is None:
+            self.logger.error("Model download failed")
+            return None
+
         return download_path
 
     def load(
diff --git a/tools/audio/av.py b/tools/audio/av.py
index 333b423d6..cd3a7d66a 100644
--- a/tools/audio/av.py
+++ b/tools/audio/av.py
@@ -41,11 +41,11 @@ def wav2(i: BytesIO, o: BufferedWriter, format: str):
 
 
 def load_audio(
-        file: Union[str, BytesIO, Path],
-        sr: Optional[int] = None,
-        format: Optional[str] = None,
-        mono=True,
-    ) -> Union[np.ndarray, Tuple[np.ndarray, int]]:
+    file: Union[str, BytesIO, Path],
+    sr: Optional[int] = None,
+    format: Optional[str] = None,
+    mono=True,
+) -> Union[np.ndarray, Tuple[np.ndarray, int]]:
     """
     https://github.com/fumiama/Retrieval-based-Voice-Conversion-WebUI/blob/412a9950a1e371a018c381d1bfb8579c4b0de329/infer/lib/audio.py#L39
     """
@@ -113,7 +113,7 @@ def frame_iter(container):
 
             np.copyto(decoded_audio[..., offset:end_index], frame_data)
             offset += len(frame_data[0])
-    
+
     container.close()
 
     # Truncate the array to the actual size
@@ -124,4 +124,4 @@ def frame_iter(container):
 
     if sr is not None:
         return decoded_audio
-    return decoded_audio, rate
\ No newline at end of file
+    return decoded_audio, rate