diff --git a/ivas_processing_scripts/audiotools/wrappers/bs1770.py b/ivas_processing_scripts/audiotools/wrappers/bs1770.py
index 7321b02d2537a1070386c3b18a80816cccb9ac81..20bc86b4bbacd3796a19aa407f266bf262a407a8 100755
--- a/ivas_processing_scripts/audiotools/wrappers/bs1770.py
+++ b/ivas_processing_scripts/audiotools/wrappers/bs1770.py
@@ -33,6 +33,7 @@
 import copy
 import logging
 import re
+import subprocess as sp
 from pathlib import Path
 from tempfile import TemporaryDirectory
 from typing import Optional, Tuple, Union
@@ -53,6 +54,7 @@ logger.setLevel(logging.DEBUG)
 def bs1770demo(
     input: audio.Audio,
     target_loudness: Optional[float] = -26,
+    rms: Optional[bool] = False,
 ) -> Tuple[float, float]:
     """
     Wrapper for ITU-R BS.1770-4, requires bs1770demo binary
@@ -82,6 +84,16 @@ def bs1770demo(
     else:
         binary = find_binary("bs1770demo")
 
+    # checking if the new binary (with '-rms') is used
+    with TemporaryDirectory() as tmp_dir_test:
+        tmp_dir_test = Path(tmp_dir_test)
+        result = sp.run(str(binary), shell=True, stdout=sp.PIPE, stderr=sp.PIPE)
+        result_stdout = result.stdout.decode("utf-8")
+        if "-rms" not in result_stdout:
+            raise RuntimeError(
+                'An bs1770demo executable without RMS support (cmdl option "-rms") was detected. Please update the bs1770demo executable. See bin/README.md for details.'
+            )
+
     if not isinstance(input, audio.BinauralAudio) and not isinstance(
         input, audio.ChannelBasedAudio
     ):
@@ -131,6 +143,9 @@ def bs1770demo(
         # write temporary file
         write(tmp_file, tmp_sig, 48000)
 
+        # using rms if true
+        if rms:
+            cmd.insert(1, "-rms")
         # run command
         result = run(cmd, logger=logger)
 
@@ -150,6 +165,7 @@ def get_loudness(
     input: audio.Audio,
     target_loudness: Optional[float] = -26,
     loudness_format: Optional[str] = None,
+    rms: Optional[bool] = False,
 ) -> Tuple[float, float]:
     """
     Loudness measurement using ITU-R BS.1770-4
@@ -196,14 +212,17 @@ def get_loudness(
         convert.format_conversion(input, tmp)
     else:
         tmp.audio = input.audio
-
-    return bs1770demo(tmp, target_loudness)
+    if rms:
+        return bs1770demo(tmp, target_loudness, rms=True)
+    else:
+        return bs1770demo(tmp, target_loudness)
 
 
 def loudness_norm(
     input: audio.Audio,
     target_loudness: Optional[float] = -26,
     loudness_format: Optional[str] = None,
+    rms: Optional[bool] = False,
 ) -> np.ndarray:
     """
     Iterative loudness normalization using ITU-R BS.1770-4
@@ -232,7 +251,10 @@ def loudness_norm(
 
     while np.abs(measured_loudness - target_loudness) > 0.5 and num_iter < 10:
         measured_loudness, scale_factor_new = get_loudness(
-            input, target_loudness, loudness_format
+            input,
+            target_loudness,
+            loudness_format,
+            rms=rms,
         )
 
         # scale input
@@ -257,6 +279,7 @@ def scale_files(
     loudness: float,
     fs: Optional[int] = 48000,
     in_meta: Optional[list] = None,
+    rms: Optional[bool] = False,
 ) -> None:
     """
     Scales audio files to desired loudness
@@ -291,7 +314,10 @@ def scale_files(
                 audio_obj = audio.fromfile(fmt, file, fs)
 
             # adjust loudness
-            scaled_audio = loudness_norm(audio_obj, loudness)
+            if rms:
+                scaled_audio = loudness_norm(audio_obj, loudness, rms=True)
+            else:
+                scaled_audio = loudness_norm(audio_obj, loudness)
 
             # write into file
             write(file, scaled_audio, audio_obj.fs)
diff --git a/ivas_processing_scripts/processing/preprocessing_2.py b/ivas_processing_scripts/processing/preprocessing_2.py
index 0bacc8eeb6580fe8f05db7355a0839fc475c45a3..5d6c51a388c7c532630b186cecb9840fee393567 100644
--- a/ivas_processing_scripts/processing/preprocessing_2.py
+++ b/ivas_processing_scripts/processing/preprocessing_2.py
@@ -149,7 +149,9 @@ class Preprocessing2(Processing):
         )[: len(audio_object.audio)]
 
         # scale background noise to desired loudness based on output format
-        noise_object.audio = loudness_norm(noise_object, loudness_noise, out_format)
+        noise_object.audio = loudness_norm(
+            noise_object, loudness_noise, out_format, rms=True
+        )
 
         # add array to signal
         audio_object.audio = noise_object.audio + audio_object.audio