diff --git a/ddsp/__init__.py b/ddsp/__init__.py
index 0b714800..88b96c98 100644
--- a/ddsp/__init__.py
+++ b/ddsp/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/colab/__init__.py b/ddsp/colab/__init__.py
index 05013bb0..46ae1b97 100644
--- a/ddsp/colab/__init__.py
+++ b/ddsp/colab/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/colab/colab_utils.py b/ddsp/colab/colab_utils.py
index 0517319c..39de86cd 100644
--- a/ddsp/colab/colab_utils.py
+++ b/ddsp/colab/colab_utils.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/core.py b/ddsp/core.py
index f723c370..734898fe 100644
--- a/ddsp/core.py
+++ b/ddsp/core.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/core_test.py b/ddsp/core_test.py
index e7c2b826..e00313e3 100644
--- a/ddsp/core_test.py
+++ b/ddsp/core_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/dags.py b/ddsp/dags.py
index 20d6e42f..eeba79ef 100644
--- a/ddsp/dags.py
+++ b/ddsp/dags.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/dags_test.py b/ddsp/dags_test.py
index 8debe54a..aad70c47 100644
--- a/ddsp/dags_test.py
+++ b/ddsp/dags_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/effects.py b/ddsp/effects.py
index 9e513673..2649b0de 100644
--- a/ddsp/effects.py
+++ b/ddsp/effects.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/effects_test.py b/ddsp/effects_test.py
index e8904221..b7cf2d8f 100644
--- a/ddsp/effects_test.py
+++ b/ddsp/effects_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/losses.py b/ddsp/losses.py
index 76b0179b..7c05a5e1 100644
--- a/ddsp/losses.py
+++ b/ddsp/losses.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/losses_test.py b/ddsp/losses_test.py
index 944a50a1..7c4075b7 100644
--- a/ddsp/losses_test.py
+++ b/ddsp/losses_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/processors.py b/ddsp/processors.py
index 8e6a6374..14334a34 100644
--- a/ddsp/processors.py
+++ b/ddsp/processors.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/processors_test.py b/ddsp/processors_test.py
index 8e8fbd5a..7d30b155 100644
--- a/ddsp/processors_test.py
+++ b/ddsp/processors_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/spectral_ops.py b/ddsp/spectral_ops.py
index d0c4e2df..7613d03b 100644
--- a/ddsp/spectral_ops.py
+++ b/ddsp/spectral_ops.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -292,8 +292,8 @@ def compute_loudness(audio,
   audio = audio if use_tf else np.array(audio)
 
   # Temporarily a batch dimension for single examples.
-  is_1d = (len(audio.shape) == 1)
-  audio = audio[lib.newaxis, :] if is_1d else audio
+  is_mono = (len(audio.shape) == 1)
+  audio = audio[lib.newaxis, :] if is_mono else audio
 
   # Take STFT.
   overlap = 1 - hop_size / frame_size
@@ -319,7 +319,7 @@ def compute_loudness(audio,
                               use_tf=use_tf)
 
   # Remove temporary batch dimension.
-  loudness = loudness[0] if is_1d else loudness
+  loudness = loudness[0] if is_mono else loudness
 
   return loudness
 
@@ -404,8 +404,8 @@ def pad_or_trim_to_expected_length(vector,
   # Pick tensorflow or numpy.
   lib = tf if use_tf else np
 
-  is_1d = (len(vector.shape) == 1)
-  vector = vector[lib.newaxis, :] if is_1d else vector
+  is_mono = (len(vector.shape) == 1)
+  vector = vector[lib.newaxis, :] if is_mono else vector
 
   # Pad missing samples
   if vector_len < expected_len:
@@ -419,7 +419,7 @@ def pad_or_trim_to_expected_length(vector,
     vector = vector[..., :expected_len]
 
   # Remove temporary batch dimension.
-  vector = vector[0] if is_1d else vector
+  vector = vector[0] if is_mono else vector
   return vector
 
 
diff --git a/ddsp/spectral_ops_test.py b/ddsp/spectral_ops_test.py
index 4f70cf41..0de87bf1 100644
--- a/ddsp/spectral_ops_test.py
+++ b/ddsp/spectral_ops_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/synths.py b/ddsp/synths.py
index c2f7522c..d751ad52 100644
--- a/ddsp/synths.py
+++ b/ddsp/synths.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/synths_test.py b/ddsp/synths_test.py
index 266de90c..07ab3c5f 100644
--- a/ddsp/synths_test.py
+++ b/ddsp/synths_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/test_util.py b/ddsp/test_util.py
index 37455763..0acc7d23 100644
--- a/ddsp/test_util.py
+++ b/ddsp/test_util.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/__init__.py b/ddsp/training/__init__.py
index e78c3b6e..39522e9c 100644
--- a/ddsp/training/__init__.py
+++ b/ddsp/training/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/cloud.py b/ddsp/training/cloud.py
index 046d82d2..51b3071b 100644
--- a/ddsp/training/cloud.py
+++ b/ddsp/training/cloud.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/cloud_test.py b/ddsp/training/cloud_test.py
index 4a8490b2..535ca977 100644
--- a/ddsp/training/cloud_test.py
+++ b/ddsp/training/cloud_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/data.py b/ddsp/training/data.py
index 3d1c124e..127f6fbc 100644
--- a/ddsp/training/data.py
+++ b/ddsp/training/data.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/data_preparation/__init__.py b/ddsp/training/data_preparation/__init__.py
index df8f0706..3ebd9e1f 100644
--- a/ddsp/training/data_preparation/__init__.py
+++ b/ddsp/training/data_preparation/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/data_preparation/ddsp_generate_synthetic_dataset.py b/ddsp/training/data_preparation/ddsp_generate_synthetic_dataset.py
index 7eb881c7..f8b82f92 100644
--- a/ddsp/training/data_preparation/ddsp_generate_synthetic_dataset.py
+++ b/ddsp/training/data_preparation/ddsp_generate_synthetic_dataset.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/data_preparation/ddsp_prepare_tfrecord.py b/ddsp/training/data_preparation/ddsp_prepare_tfrecord.py
index 06bacaaf..0ac54fcb 100644
--- a/ddsp/training/data_preparation/ddsp_prepare_tfrecord.py
+++ b/ddsp/training/data_preparation/ddsp_prepare_tfrecord.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/data_preparation/prepare_tfrecord_lib.py b/ddsp/training/data_preparation/prepare_tfrecord_lib.py
index 2f150be6..b160690c 100644
--- a/ddsp/training/data_preparation/prepare_tfrecord_lib.py
+++ b/ddsp/training/data_preparation/prepare_tfrecord_lib.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/data_preparation/prepare_tfrecord_lib_test.py b/ddsp/training/data_preparation/prepare_tfrecord_lib_test.py
index e70cbae5..a7f0fb62 100644
--- a/ddsp/training/data_preparation/prepare_tfrecord_lib_test.py
+++ b/ddsp/training/data_preparation/prepare_tfrecord_lib_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/data_preparation/synthetic_data.py b/ddsp/training/data_preparation/synthetic_data.py
index 870d8e9e..44b68b2c 100644
--- a/ddsp/training/data_preparation/synthetic_data.py
+++ b/ddsp/training/data_preparation/synthetic_data.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/ddsp_export.py b/ddsp/training/ddsp_export.py
index 00d2b8e2..ddfbe6f1 100644
--- a/ddsp/training/ddsp_export.py
+++ b/ddsp/training/ddsp_export.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/ddsp_run.py b/ddsp/training/ddsp_run.py
index 1877c2a2..6d886d64 100644
--- a/ddsp/training/ddsp_run.py
+++ b/ddsp/training/ddsp_run.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/decoders.py b/ddsp/training/decoders.py
index 154f9cde..d60f370c 100644
--- a/ddsp/training/decoders.py
+++ b/ddsp/training/decoders.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/decoders_test.py b/ddsp/training/decoders_test.py
index 26367ab4..485531b9 100644
--- a/ddsp/training/decoders_test.py
+++ b/ddsp/training/decoders_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/docker/__init__.py b/ddsp/training/docker/__init__.py
index 733268f7..a7b43413 100644
--- a/ddsp/training/docker/__init__.py
+++ b/ddsp/training/docker/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/docker/ddsp_ai_platform.py b/ddsp/training/docker/ddsp_ai_platform.py
index 64ac0188..c45c7280 100644
--- a/ddsp/training/docker/ddsp_ai_platform.py
+++ b/ddsp/training/docker/ddsp_ai_platform.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/docker/task.py b/ddsp/training/docker/task.py
index 0440f013..fe59ffb2 100644
--- a/ddsp/training/docker/task.py
+++ b/ddsp/training/docker/task.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/docker/task_test.py b/ddsp/training/docker/task_test.py
index 23255cc4..d161dd3a 100644
--- a/ddsp/training/docker/task_test.py
+++ b/ddsp/training/docker/task_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/encoders.py b/ddsp/training/encoders.py
index ee86b9e7..e3b58980 100644
--- a/ddsp/training/encoders.py
+++ b/ddsp/training/encoders.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/eval_util.py b/ddsp/training/eval_util.py
index 93bb43da..cc63692a 100644
--- a/ddsp/training/eval_util.py
+++ b/ddsp/training/eval_util.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/evaluators.py b/ddsp/training/evaluators.py
index f68d4b20..2db9a26b 100644
--- a/ddsp/training/evaluators.py
+++ b/ddsp/training/evaluators.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/gin/__init__.py b/ddsp/training/gin/__init__.py
index 05013bb0..46ae1b97 100644
--- a/ddsp/training/gin/__init__.py
+++ b/ddsp/training/gin/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/gin/datasets/__init__.py b/ddsp/training/gin/datasets/__init__.py
index 05013bb0..46ae1b97 100644
--- a/ddsp/training/gin/datasets/__init__.py
+++ b/ddsp/training/gin/datasets/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/gin/eval/__init__.py b/ddsp/training/gin/eval/__init__.py
index 05013bb0..46ae1b97 100644
--- a/ddsp/training/gin/eval/__init__.py
+++ b/ddsp/training/gin/eval/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/gin/models/__init__.py b/ddsp/training/gin/models/__init__.py
index 05013bb0..46ae1b97 100644
--- a/ddsp/training/gin/models/__init__.py
+++ b/ddsp/training/gin/models/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/gin/models/vst/__init__.py b/ddsp/training/gin/models/vst/__init__.py
index 05013bb0..46ae1b97 100644
--- a/ddsp/training/gin/models/vst/__init__.py
+++ b/ddsp/training/gin/models/vst/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/gin/optimization/__init__.py b/ddsp/training/gin/optimization/__init__.py
index 05013bb0..46ae1b97 100644
--- a/ddsp/training/gin/optimization/__init__.py
+++ b/ddsp/training/gin/optimization/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/gin/papers/__init__.py b/ddsp/training/gin/papers/__init__.py
index 05013bb0..46ae1b97 100644
--- a/ddsp/training/gin/papers/__init__.py
+++ b/ddsp/training/gin/papers/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/gin/papers/iclr2020/__init__.py b/ddsp/training/gin/papers/iclr2020/__init__.py
index 05013bb0..46ae1b97 100644
--- a/ddsp/training/gin/papers/iclr2020/__init__.py
+++ b/ddsp/training/gin/papers/iclr2020/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/gin/papers/icml2020/__init__.py b/ddsp/training/gin/papers/icml2020/__init__.py
index 05013bb0..46ae1b97 100644
--- a/ddsp/training/gin/papers/icml2020/__init__.py
+++ b/ddsp/training/gin/papers/icml2020/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/heuristics.py b/ddsp/training/heuristics.py
index eb16338b..63a55333 100644
--- a/ddsp/training/heuristics.py
+++ b/ddsp/training/heuristics.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/heuristics_test.py b/ddsp/training/heuristics_test.py
index b6921353..8a9ce066 100644
--- a/ddsp/training/heuristics_test.py
+++ b/ddsp/training/heuristics_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/inference.py b/ddsp/training/inference.py
index d2fe718a..25897e68 100644
--- a/ddsp/training/inference.py
+++ b/ddsp/training/inference.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/metrics.py b/ddsp/training/metrics.py
index 6b603ef0..e26dafe1 100644
--- a/ddsp/training/metrics.py
+++ b/ddsp/training/metrics.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/metrics_test.py b/ddsp/training/metrics_test.py
index cc885712..20c8eac4 100644
--- a/ddsp/training/metrics_test.py
+++ b/ddsp/training/metrics_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/models/__init__.py b/ddsp/training/models/__init__.py
index 268a2edd..d16846e7 100644
--- a/ddsp/training/models/__init__.py
+++ b/ddsp/training/models/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/models/autoencoder.py b/ddsp/training/models/autoencoder.py
index 4ca89e84..758c21dd 100644
--- a/ddsp/training/models/autoencoder.py
+++ b/ddsp/training/models/autoencoder.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/models/autoencoder_test.py b/ddsp/training/models/autoencoder_test.py
index a03fbacd..42b4fb32 100644
--- a/ddsp/training/models/autoencoder_test.py
+++ b/ddsp/training/models/autoencoder_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/models/inverse_synthesis.py b/ddsp/training/models/inverse_synthesis.py
index 16e6aed4..9b902913 100644
--- a/ddsp/training/models/inverse_synthesis.py
+++ b/ddsp/training/models/inverse_synthesis.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/models/midi_autoencoder.py b/ddsp/training/models/midi_autoencoder.py
index 4a58746c..a3f5224b 100644
--- a/ddsp/training/models/midi_autoencoder.py
+++ b/ddsp/training/models/midi_autoencoder.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/models/model.py b/ddsp/training/models/model.py
index e7596ca6..cbb38eb1 100644
--- a/ddsp/training/models/model.py
+++ b/ddsp/training/models/model.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/nn.py b/ddsp/training/nn.py
index f571c80d..c53a82ee 100644
--- a/ddsp/training/nn.py
+++ b/ddsp/training/nn.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/nn_test.py b/ddsp/training/nn_test.py
index 1c28ffbb..738a9bd9 100644
--- a/ddsp/training/nn_test.py
+++ b/ddsp/training/nn_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/plotting.py b/ddsp/training/plotting.py
index 070da51b..916b8886 100644
--- a/ddsp/training/plotting.py
+++ b/ddsp/training/plotting.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/postprocessing.py b/ddsp/training/postprocessing.py
index 4307a380..cd94192b 100644
--- a/ddsp/training/postprocessing.py
+++ b/ddsp/training/postprocessing.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/preprocessing.py b/ddsp/training/preprocessing.py
index 01854aa0..7a74f014 100644
--- a/ddsp/training/preprocessing.py
+++ b/ddsp/training/preprocessing.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/preprocessing_test.py b/ddsp/training/preprocessing_test.py
index d3f2d7a0..2dc05659 100644
--- a/ddsp/training/preprocessing_test.py
+++ b/ddsp/training/preprocessing_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/summaries.py b/ddsp/training/summaries.py
index 7007deb4..4ed0acb4 100644
--- a/ddsp/training/summaries.py
+++ b/ddsp/training/summaries.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/train_util.py b/ddsp/training/train_util.py
index 3ae342f3..20c9c8a4 100644
--- a/ddsp/training/train_util.py
+++ b/ddsp/training/train_util.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/training/trainers.py b/ddsp/training/trainers.py
index 25dbdb9c..0aa616b6 100644
--- a/ddsp/training/trainers.py
+++ b/ddsp/training/trainers.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/ddsp/version.py b/ddsp/version.py
index ed88c3e2..36e46e19 100644
--- a/ddsp/version.py
+++ b/ddsp/version.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/setup.py b/setup.py
index 1c142e4d..d256ea8a 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/update_gin_config.py b/update_gin_config.py
index 634cb6ee..af99cdab 100644
--- a/update_gin_config.py
+++ b/update_gin_config.py
@@ -1,4 +1,4 @@
-# Copyright 2024 The DDSP Authors.
+# Copyright 2025 The DDSP Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.