diff --git a/infer/lib/rtrvc.py b/infer/lib/rtrvc.py
index 8da568c..6e5a5e8 100644
--- a/infer/lib/rtrvc.py
+++ b/infer/lib/rtrvc.py
@@ -405,7 +405,10 @@ class RVC:
             if f0method == "rmvpe":
                 f0_extractor_frame = 5120 * ((f0_extractor_frame - 1) // 5120 + 1) - 160
             pitch, pitchf = self.get_f0(
-                input_wav[-f0_extractor_frame:], self.f0_up_key - self.formant_shift, self.n_cpu, f0method
+                input_wav[-f0_extractor_frame:],
+                self.f0_up_key - self.formant_shift,
+                self.n_cpu,
+                f0method,
             )
             shift = block_frame_16k // 160
             self.cache_pitch[:-shift] = self.cache_pitch[shift:].clone()
@@ -413,7 +416,9 @@ class RVC:
             self.cache_pitch[4 - pitch.shape[0] :] = pitch[3:-1]
             self.cache_pitchf[4 - pitch.shape[0] :] = pitchf[3:-1]
             cache_pitch = self.cache_pitch[None, -p_len:]
-            cache_pitchf = self.cache_pitchf[None, -p_len:] * return_length2 / return_length
+            cache_pitchf = (
+                self.cache_pitchf[None, -p_len:] * return_length2 / return_length
+            )
         t4 = ttime()
         feats = F.interpolate(feats.permute(0, 2, 1), scale_factor=2).permute(0, 2, 1)
         feats = feats[:, :p_len, :]