Update utils.py

utils.py

@@ -620,8 +620,12 @@ class Utils_functions:
             ),
             -2,
         )
-        strg = abwvc.tostring()
-
+        
+        strg = (np.int16(abwvc * 32767.0))
+        ## convert np.int16 array to float32 array
+        strg = strg.astype(np.float32)
+        ##conver float32 array to string
+        strg = strg.tostring()
         return (
             np.clip(spec, -1.0, 1.0),
             strg,