diff --git a/src/f5_tts/infer/infer_gradio.py b/src/f5_tts/infer/infer_gradio.py
index b66ac19..dd97509 100644
--- a/src/f5_tts/infer/infer_gradio.py
+++ b/src/f5_tts/infer/infer_gradio.py
@@ -3,6 +3,7 @@
 
 import gc
 import json
+import os
 import re
 import tempfile
 from collections import OrderedDict
@@ -189,16 +190,20 @@ def infer(
 
     # Remove silence
     if remove_silence:
-        with tempfile.NamedTemporaryFile(suffix=".wav") as f:
-            sf.write(f.name, final_wave, final_sample_rate)
+        with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as f:
+            temp_path = f.name
+        try:
+            sf.write(temp_path, final_wave, final_sample_rate)
             remove_silence_for_generated_wav(f.name)
             final_wave, _ = torchaudio.load(f.name)
+        finally:
+            os.unlink(temp_path)
         final_wave = final_wave.squeeze().cpu().numpy()
 
     # Save the spectrogram
-    with tempfile.NamedTemporaryFile(suffix=".png", delete=False) as tmp_spectrogram:
+    with tempfile.NamedTemporaryFile(suffix=".png", delete_on_close=False) as tmp_spectrogram:
         spectrogram_path = tmp_spectrogram.name
-        save_spectrogram(combined_spectrogram, spectrogram_path)
+    save_spectrogram(combined_spectrogram, spectrogram_path)
 
     return (final_sample_rate, final_wave), spectrogram_path, ref_text, used_seed
 
diff --git a/src/f5_tts/infer/utils_infer.py b/src/f5_tts/infer/utils_infer.py
index 843874a..1481628 100644
--- a/src/f5_tts/infer/utils_infer.py
+++ b/src/f5_tts/infer/utils_infer.py
@@ -306,42 +306,44 @@ def preprocess_ref_audio_text(ref_audio_orig, ref_text, show_info=print):
         ref_audio = _ref_audio_cache[audio_hash]
 
     else:  # first pass, do preprocess
-        with tempfile.NamedTemporaryFile(delete=False, suffix=".wav") as f:
-            aseg = AudioSegment.from_file(ref_audio_orig)
+        with tempfile.NamedTemporaryFile(delete_on_close=False, suffix=".wav") as f:
+            temp_path = f.name
 
-            # 1. try to find long silence for clipping
+        aseg = AudioSegment.from_file(ref_audio_orig)
+
+        # 1. try to find long silence for clipping
+        non_silent_segs = silence.split_on_silence(
+            aseg, min_silence_len=1000, silence_thresh=-50, keep_silence=1000, seek_step=10
+        )
+        non_silent_wave = AudioSegment.silent(duration=0)
+        for non_silent_seg in non_silent_segs:
+            if len(non_silent_wave) > 6000 and len(non_silent_wave + non_silent_seg) > 12000:
+                show_info("Audio is over 12s, clipping short. (1)")
+                break
+            non_silent_wave += non_silent_seg
+
+        # 2. try to find short silence for clipping if 1. failed
+        if len(non_silent_wave) > 12000:
             non_silent_segs = silence.split_on_silence(
-                aseg, min_silence_len=1000, silence_thresh=-50, keep_silence=1000, seek_step=10
+                aseg, min_silence_len=100, silence_thresh=-40, keep_silence=1000, seek_step=10
             )
             non_silent_wave = AudioSegment.silent(duration=0)
             for non_silent_seg in non_silent_segs:
                 if len(non_silent_wave) > 6000 and len(non_silent_wave + non_silent_seg) > 12000:
-                    show_info("Audio is over 12s, clipping short. (1)")
+                    show_info("Audio is over 12s, clipping short. (2)")
                     break
                 non_silent_wave += non_silent_seg
 
-            # 2. try to find short silence for clipping if 1. failed
-            if len(non_silent_wave) > 12000:
-                non_silent_segs = silence.split_on_silence(
-                    aseg, min_silence_len=100, silence_thresh=-40, keep_silence=1000, seek_step=10
-                )
-                non_silent_wave = AudioSegment.silent(duration=0)
-                for non_silent_seg in non_silent_segs:
-                    if len(non_silent_wave) > 6000 and len(non_silent_wave + non_silent_seg) > 12000:
-                        show_info("Audio is over 12s, clipping short. (2)")
-                        break
-                    non_silent_wave += non_silent_seg
+        aseg = non_silent_wave
 
-            aseg = non_silent_wave
+        # 3. if no proper silence found for clipping
+        if len(aseg) > 12000:
+            aseg = aseg[:12000]
+            show_info("Audio is over 12s, clipping short. (3)")
 
-            # 3. if no proper silence found for clipping
-            if len(aseg) > 12000:
-                aseg = aseg[:12000]
-                show_info("Audio is over 12s, clipping short. (3)")
-
-            aseg = remove_silence_edges(aseg) + AudioSegment.silent(duration=50)
-            aseg.export(f.name, format="wav")
-            ref_audio = f.name
+        aseg = remove_silence_edges(aseg) + AudioSegment.silent(duration=50)
+        aseg.export(temp_path, format="wav")
+        ref_audio = temp_path
 
         # Cache the processed reference audio
         _ref_audio_cache[audio_hash] = ref_audio