fix: demucs import

app/infer.py

@@ -1,7 +1,7 @@
 from glob import glob
 import os
 from typing import Tuple
-import demucs
+from demucs.separate import main as demucs
 import gradio as gr
 import numpy as np
 import soundfile as sf
@@ -24,7 +24,7 @@ def infer(exp_dir: str, original_audio: str, f0add: int) -> Tuple[int, np.ndarra
 
     base = os.path.basename(original_audio)
     base = os.path.splitext(base)[0]
-    demucs.separate.main(
+    demucs(
         ["--two-stems", "vocals", "-d", str(device), "-n", "htdemucs", original_audio]
     )
     out = os.path.join("separated", "htdemucs", base, "vocals.wav")