diff --git a/server.py b/server.py
index d309911..18be00e 100644
--- a/server.py
+++ b/server.py
@@ -47,7 +47,7 @@ def upload_to_s3(processed_data, userId):
 def int16_to_float32(samples):
     return samples.astype(np.float32) / 32768.0
 
-def process_audio_bytes(audio_bytes):
+def process_audio_bytes(audio_bytes, index):
     # Read the audio file from bytes
     sample_rate, data = wavfile.read(io.BytesIO(audio_bytes))
     left = []
@@ -60,7 +60,8 @@ def process_audio_bytes(audio_bytes):
 
     pa = ProceesAudio()
 
-    processed_data = pa.perform_modulation(data=data, sr=sample_rate, index=0)
+
+    processed_data = pa.perform_modulation(data=data, sr=sample_rate, index=index)
     file_url = upload_to_s3(processed_data=processed_data, userId="parth")
     arr_to_show = []
 
@@ -79,14 +80,15 @@ def modify():
     if 'song' not in request.files:
         return 'No file part', 400
     file = request.files['song']
+    index = request.form.get('index')  # Assuming index is sent as a form field
     if file.filename == '':
         return 'No selected file', 400
     if file:
         # Read file bytes
         file_bytes = file.read()
         
-        # Process the audio bytes
-        response = process_audio_bytes(file_bytes)
+        # Process the audio bytes with the index parameter
+        response = process_audio_bytes(file_bytes, index)
         response.headers.add('Access-Control-Allow-Origin', '*')
         return response