diff --git a/resample_audio.py b/resample_audio.py
index 4e3c414..9caac14 100644
--- a/resample_audio.py
+++ b/resample_audio.py
@@ -8,6 +8,7 @@ import wave
 import numpy as np
 import os
 import json
+import shutil
 from scipy import signal
 
 def load_config():
@@ -126,16 +127,20 @@ def main():
 
         # Create backup
         backup_path = input_path + '.backup'
+        source_path = input_path
+
         if not os.path.exists(backup_path):
-            os.rename(input_path, backup_path)
+            # Copy to backup instead of rename, so original still exists
+            shutil.copy2(input_path, backup_path)
             print(f"  Backup created: {filename}.backup")
+            source_path = backup_path
         else:
-            input_path = backup_path
             print(f"  Using existing backup")
+            source_path = backup_path
 
         # Resample
         output_path = os.path.join(sounds_dir, filename)
-        if resample_wav(input_path, output_path, target_rate):
+        if resample_wav(source_path, output_path, target_rate):
             print(f"  ✓ Successfully resampled to {target_rate}Hz")
         else:
             print(f"  ✗ Failed to resample, restoring backup")