diff --git a/src/so_vits_svc_fork/__main__.py b/src/so_vits_svc_fork/__main__.py
index 4e1505a1..d3bda208 100644
--- a/src/so_vits_svc_fork/__main__.py
+++ b/src/so_vits_svc_fork/__main__.py
@@ -287,6 +287,8 @@ def infer(
 )
 @click.option("-s", "--speaker", type=str, default=None, help="speaker name")
 @click.option("-v", "--version", type=int, default=2, help="version")
+@click.option("-i", "--input-device", type=int, default=None, help="input device")
+@click.option("-o", "--output-device", type=int, default=None, help="output device")
 def vc(
     # paths
     model_path: Path,
@@ -306,6 +308,8 @@ def vc(
     crossfade_seconds: float,
     block_seconds: float,
     version: int,
+    input_device: int | str | None,
+    output_device: int | str | None,
     device: Literal["cpu", "cuda"],
 ) -> None:
     """Realtime inference from microphone"""
@@ -343,6 +347,8 @@ def vc(
         db_thresh=db_thresh,
         pad_seconds=pad_seconds,
         version=version,
+        input_device=input_device,
+        output_device=output_device,
         device=device,
     )
 
diff --git a/src/so_vits_svc_fork/gui.py b/src/so_vits_svc_fork/gui.py
index 16a6e4c9..3586a3a7 100644
--- a/src/so_vits_svc_fork/gui.py
+++ b/src/so_vits_svc_fork/gui.py
@@ -25,6 +25,13 @@ def play_audio(path: Path | str):
 def main():
     sg.theme("Dark")
     model_candidates = list(sorted(Path("./logs/44k/").glob("G_*.pth")))
+
+    devices = sd.query_devices()
+    input_devices = [d["name"] for d in devices if d["max_input_channels"] > 0]
+    output_devices = [d["name"] for d in devices if d["max_output_channels"] > 0]
+    devices[sd.default.device[0]]["name"]
+    devices[sd.default.device[1]]["name"]
+
     layout = [
         [
             sg.Frame(
@@ -221,6 +228,24 @@ def main():
                             key="realtime_algorithm",
                         ),
                     ],
+                    [
+                        sg.Text("Input device"),
+                        sg.Combo(
+                            key="input_device",
+                            values=input_devices,
+                            size=(20, 1),
+                            default_value=input_devices[0],
+                        ),
+                    ],
+                    [
+                        sg.Text("Output device"),
+                        sg.Combo(
+                            key="output_device",
+                            values=output_devices,
+                            size=(20, 1),
+                            default_value=output_devices[0],
+                        ),
+                    ],
                 ],
             )
         ],
@@ -332,6 +357,8 @@ def update_combo() -> None:
                         version=int(values["realtime_algorithm"][0]),
                         device="cuda" if values["use_gpu"] else "cpu",
                         block_seconds=values["block_seconds"],
+                        input_device=values["input_device"],
+                        output_device=values["output_device"],
                     ),
                 )
             elif event == "stop_vc":
diff --git a/src/so_vits_svc_fork/inference_main.py b/src/so_vits_svc_fork/inference_main.py
index c5a10bd3..40a6f0b0 100644
--- a/src/so_vits_svc_fork/inference_main.py
+++ b/src/so_vits_svc_fork/inference_main.py
@@ -86,6 +86,8 @@ def realtime(
     crossfade_seconds: float = 0.05,
     block_seconds: float = 0.5,
     version: int = 2,
+    input_device: int | str | None = None,
+    output_device: int | str | None = None,
     device: Literal["cpu", "cuda"] = "cuda" if torch.cuda.is_available() else "cpu",
 ):
     import sounddevice as sd
@@ -111,6 +113,35 @@ def realtime(
             svc_model=svc_model,
         )
 
+    # LOG all device info
+    devices = sd.query_devices()
+    LOG.info(f"Device: {devices}")
+    if isinstance(input_device, str):
+        input_device_candidates = [
+            i for i, d in enumerate(devices) if d["name"] == input_device
+        ]
+        if len(input_device_candidates) == 0:
+            LOG.warning(f"Input device {input_device} not found, using default")
+            input_device = None
+        else:
+            input_device = input_device_candidates[0]
+    if isinstance(output_device, str):
+        output_device_candidates = [
+            i for i, d in enumerate(devices) if d["name"] == output_device
+        ]
+        if len(output_device_candidates) == 0:
+            LOG.warning(f"Output device {output_device} not found, using default")
+            output_device = None
+        else:
+            output_device = output_device_candidates[0]
+    if input_device is None or input_device >= len(devices):
+        input_device = sd.default.device[0]
+    if output_device is None or output_device >= len(devices):
+        output_device = sd.default.device[1]
+    LOG.info(
+        f"Input Device: {devices[input_device]['name']}, Output Device: {devices[output_device]['name']}"
+    )
+
     def callback(
         indata: np.ndarray,
         outdata: np.ndarray,
@@ -139,6 +170,7 @@ def callback(
         ).reshape(-1, 1)
 
     with sd.Stream(
+        device=(input_device, output_device),
         channels=1,
         callback=callback,
         samplerate=svc_model.target_sample,