diff --git a/src/ansys/sound/core/examples_helpers/download.py b/src/ansys/sound/core/examples_helpers/download.py
index fadc8c0f3..4ffb89749 100644
--- a/src/ansys/sound/core/examples_helpers/download.py
+++ b/src/ansys/sound/core/examples_helpers/download.py
@@ -98,8 +98,8 @@ def download_file_and_retrieve_path_in_dpf_server(
     filename, directory=None, server=None
 ):  # pragma no cover
     """Download a file from the PyAnsys Sound examples repository and upload it to the DPF server.
-    
-    This function downloads a file from the PyAnsys Sound examples repository and uploads it to 
+
+    This function downloads a file from the PyAnsys Sound examples repository and uploads it to
     the DPF server. This allows to be independent on the server configuration.
 
     Parameters
@@ -108,7 +108,7 @@ def download_file_and_retrieve_path_in_dpf_server(
         File name.
 
     directory : str, optional
-        Directory where the file is located. 
+        Directory where the file is located.
         For PyAnsys Sound repository, should be set to 'pyansys-sound'
 
     server : ansys.dpf.core.server.Server, optional
@@ -156,7 +156,9 @@ def download_flute_psd(server=None):
         Path on the Docker container for the ``flute_psd.txt`` file.
 
     """
-    return download_file_and_retrieve_path_in_dpf_server("flute_psd.txt", "pyansys-sound", server=server)
+    return download_file_and_retrieve_path_in_dpf_server(
+        "flute_psd.txt", "pyansys-sound", server=server
+    )
 
 
 def download_flute_wav(server=None):
@@ -167,7 +169,9 @@ def download_flute_wav(server=None):
     str
         Path for the ``flute.wav`` file.
     """
-    return download_file_and_retrieve_path_in_dpf_server("flute.wav", "pyansys-sound", server=server)
+    return download_file_and_retrieve_path_in_dpf_server(
+        "flute.wav", "pyansys-sound", server=server
+    )
 
 
 def download_flute_2_wav(server=None):
@@ -178,7 +182,9 @@ def download_flute_2_wav(server=None):
     str
         Path for the ``flute2.wav`` file.
     """
-    return download_file_and_retrieve_path_in_dpf_server("flute2.wav", "pyansys-sound", server=server)
+    return download_file_and_retrieve_path_in_dpf_server(
+        "flute2.wav", "pyansys-sound", server=server
+    )
 
 
 def download_accel_with_rpm_wav(server=None):
@@ -189,7 +195,9 @@ def download_accel_with_rpm_wav(server=None):
     str
         Path for the ``accel_with_rpm.wav`` file.
     """
-    return download_file_and_retrieve_path_in_dpf_server("accel_with_rpm.wav", "pyansys-sound", server=server)
+    return download_file_and_retrieve_path_in_dpf_server(
+        "accel_with_rpm.wav", "pyansys-sound", server=server
+    )
 
 
 def download_accel_with_rpm_2_wav(server=None):
@@ -200,7 +208,9 @@ def download_accel_with_rpm_2_wav(server=None):
     str
         Path for the ``accel_with_rpm_2.wav`` file.
     """
-    return download_file_and_retrieve_path_in_dpf_server("accel_with_rpm_2.wav", "pyansys-sound", server=server)
+    return download_file_and_retrieve_path_in_dpf_server(
+        "accel_with_rpm_2.wav", "pyansys-sound", server=server
+    )
 
 
 def download_accel_with_rpm_3_wav(server=None):
@@ -211,7 +221,9 @@ def download_accel_with_rpm_3_wav(server=None):
     str
         Path for the ``accel_with_rpm_3.wav`` file.
     """
-    return download_file_and_retrieve_path_in_dpf_server("accel_with_rpm_3.wav", "pyansys-sound", server=server)
+    return download_file_and_retrieve_path_in_dpf_server(
+        "accel_with_rpm_3.wav", "pyansys-sound", server=server
+    )
 
 
 def download_xtract_demo_signal_1_wav(server=None):
@@ -222,7 +234,9 @@ def download_xtract_demo_signal_1_wav(server=None):
     str
         Path for the ``xtract_demo_signal_1.wav`` file.
     """
-    return download_file_and_retrieve_path_in_dpf_server("xtract_demo_signal_1.wav", "pyansys-sound", server=server)
+    return download_file_and_retrieve_path_in_dpf_server(
+        "xtract_demo_signal_1.wav", "pyansys-sound", server=server
+    )
 
 
 def download_xtract_demo_signal_2_wav(server=None):
@@ -233,4 +247,6 @@ def download_xtract_demo_signal_2_wav(server=None):
     str
         Path for the ``xtract_demo_signal_2.wav`` file.
     """
-    return download_file_and_retrieve_path_in_dpf_server("xtract_demo_signal_2.wav", "pyansys-sound", server=server)
+    return download_file_and_retrieve_path_in_dpf_server(
+        "xtract_demo_signal_2.wav", "pyansys-sound", server=server
+    )