diff --git a/ivas_processing_scripts/processing/processing.py b/ivas_processing_scripts/processing/processing.py
index 649aa882f328799d58fa7052af4e299272ec556a..0c1c72c0aca58c13d1660d15491e91954c726703 100755
--- a/ivas_processing_scripts/processing/processing.py
+++ b/ivas_processing_scripts/processing/processing.py
@@ -363,13 +363,16 @@ def process_item(
             out_dir_wav = True
         else:
             processing_paths.append(tmp_file.with_suffix(f".{p.name}{tmp_file.suffix}"))
-            try:
+            try:  # TODO: clean up try except blocks
                 out_format = p.out_fmt
             except AttributeError:
                 # EVS has no attribute out_fmt
                 out_format = p.in_fmt
             try:
-                bool_ism = out_format.startswith("ISM")
+                if p.name == "pre_2":
+                    bool_ism = p.in_fmt.startswith("ISM")
+                else:
+                    bool_ism = out_format.startswith("ISM")
             except Exception:
                 bool_ism = out_format.name.startswith("ISM")