diff --git a/ddsp/__init__.py b/ddsp/__init__.py
index 48ee4b81..0b714800 100644
--- a/ddsp/__init__.py
+++ b/ddsp/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 ac3e7d30..05013bb0 100644
--- a/ddsp/colab/__init__.py
+++ b/ddsp/colab/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 05639694..0517319c 100644
--- a/ddsp/colab/colab_utils.py
+++ b/ddsp/colab/colab_utils.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 85aadb06..f723c370 100644
--- a/ddsp/core.py
+++ b/ddsp/core.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 f4ce3c73..e7c2b826 100644
--- a/ddsp/core_test.py
+++ b/ddsp/core_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 de0b7a08..20d6e42f 100644
--- a/ddsp/dags.py
+++ b/ddsp/dags.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 d1f56bcb..8debe54a 100644
--- a/ddsp/dags_test.py
+++ b/ddsp/dags_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 f9c39306..9e513673 100644
--- a/ddsp/effects.py
+++ b/ddsp/effects.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 a53af212..e8904221 100644
--- a/ddsp/effects_test.py
+++ b/ddsp/effects_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 efddeaeb..76b0179b 100644
--- a/ddsp/losses.py
+++ b/ddsp/losses.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 5b5a50b0..944a50a1 100644
--- a/ddsp/losses_test.py
+++ b/ddsp/losses_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 b0fe3c10..8e6a6374 100644
--- a/ddsp/processors.py
+++ b/ddsp/processors.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 a85b1da6..8e8fbd5a 100644
--- a/ddsp/processors_test.py
+++ b/ddsp/processors_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 0a638ece..d0c4e2df 100644
--- a/ddsp/spectral_ops.py
+++ b/ddsp/spectral_ops.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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.
@@ -151,7 +151,7 @@ def get_framed_lengths(input_length, frame_size, hop_size, padding='center'):
   """
   # Use numpy since this function isn't used dynamically.
   def get_n_frames(length):
-    return int(np.floor((length - frame_size) / hop_size)) + 1
+    return int(np.floor((length - frame_size) // hop_size)) + 1
 
   if padding == 'valid':
     padded_length = input_length
diff --git a/ddsp/spectral_ops_test.py b/ddsp/spectral_ops_test.py
index 47ed937c..4f70cf41 100644
--- a/ddsp/spectral_ops_test.py
+++ b/ddsp/spectral_ops_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 0cfb897f..c2f7522c 100644
--- a/ddsp/synths.py
+++ b/ddsp/synths.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 612c71c2..266de90c 100644
--- a/ddsp/synths_test.py
+++ b/ddsp/synths_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 e86dcb47..37455763 100644
--- a/ddsp/test_util.py
+++ b/ddsp/test_util.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 66fca96d..e78c3b6e 100644
--- a/ddsp/training/__init__.py
+++ b/ddsp/training/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 608932b5..046d82d2 100644
--- a/ddsp/training/cloud.py
+++ b/ddsp/training/cloud.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 c9dca6c4..4a8490b2 100644
--- a/ddsp/training/cloud_test.py
+++ b/ddsp/training/cloud_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 03f38d5e..3d1c124e 100644
--- a/ddsp/training/data.py
+++ b/ddsp/training/data.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 dfd70faa..df8f0706 100644
--- a/ddsp/training/data_preparation/__init__.py
+++ b/ddsp/training/data_preparation/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 6d79abd8..7eb881c7 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 2023 The DDSP Authors.
+# Copyright 2024 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 1cab8a61..06bacaaf 100644
--- a/ddsp/training/data_preparation/ddsp_prepare_tfrecord.py
+++ b/ddsp/training/data_preparation/ddsp_prepare_tfrecord.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 635c3bed..7ca22f21 100644
--- a/ddsp/training/data_preparation/prepare_tfrecord_lib.py
+++ b/ddsp/training/data_preparation/prepare_tfrecord_lib.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 83740316..e70cbae5 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 2023 The DDSP Authors.
+# Copyright 2024 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 1312b4aa..870d8e9e 100644
--- a/ddsp/training/data_preparation/synthetic_data.py
+++ b/ddsp/training/data_preparation/synthetic_data.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 0d89d50e..00d2b8e2 100644
--- a/ddsp/training/ddsp_export.py
+++ b/ddsp/training/ddsp_export.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 1c9a39bf..1877c2a2 100644
--- a/ddsp/training/ddsp_run.py
+++ b/ddsp/training/ddsp_run.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 95f0155a..154f9cde 100644
--- a/ddsp/training/decoders.py
+++ b/ddsp/training/decoders.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 1d2c76d2..26367ab4 100644
--- a/ddsp/training/decoders_test.py
+++ b/ddsp/training/decoders_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 fa3161bd..733268f7 100644
--- a/ddsp/training/docker/__init__.py
+++ b/ddsp/training/docker/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 c449f882..64ac0188 100644
--- a/ddsp/training/docker/ddsp_ai_platform.py
+++ b/ddsp/training/docker/ddsp_ai_platform.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 f3f05228..0440f013 100644
--- a/ddsp/training/docker/task.py
+++ b/ddsp/training/docker/task.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 df02d2ee..23255cc4 100644
--- a/ddsp/training/docker/task_test.py
+++ b/ddsp/training/docker/task_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 54daa022..ee86b9e7 100644
--- a/ddsp/training/encoders.py
+++ b/ddsp/training/encoders.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 f7f099ee..93bb43da 100644
--- a/ddsp/training/eval_util.py
+++ b/ddsp/training/eval_util.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 a4ee12c6..f68d4b20 100644
--- a/ddsp/training/evaluators.py
+++ b/ddsp/training/evaluators.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 ac3e7d30..05013bb0 100644
--- a/ddsp/training/gin/__init__.py
+++ b/ddsp/training/gin/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 ac3e7d30..05013bb0 100644
--- a/ddsp/training/gin/datasets/__init__.py
+++ b/ddsp/training/gin/datasets/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 ac3e7d30..05013bb0 100644
--- a/ddsp/training/gin/eval/__init__.py
+++ b/ddsp/training/gin/eval/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 ac3e7d30..05013bb0 100644
--- a/ddsp/training/gin/models/__init__.py
+++ b/ddsp/training/gin/models/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 ac3e7d30..05013bb0 100644
--- a/ddsp/training/gin/models/vst/__init__.py
+++ b/ddsp/training/gin/models/vst/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 ac3e7d30..05013bb0 100644
--- a/ddsp/training/gin/optimization/__init__.py
+++ b/ddsp/training/gin/optimization/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 ac3e7d30..05013bb0 100644
--- a/ddsp/training/gin/papers/__init__.py
+++ b/ddsp/training/gin/papers/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 ac3e7d30..05013bb0 100644
--- a/ddsp/training/gin/papers/iclr2020/__init__.py
+++ b/ddsp/training/gin/papers/iclr2020/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 ac3e7d30..05013bb0 100644
--- a/ddsp/training/gin/papers/icml2020/__init__.py
+++ b/ddsp/training/gin/papers/icml2020/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 56c60fc1..eb16338b 100644
--- a/ddsp/training/heuristics.py
+++ b/ddsp/training/heuristics.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 476481d2..b6921353 100644
--- a/ddsp/training/heuristics_test.py
+++ b/ddsp/training/heuristics_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 4832bb09..d2fe718a 100644
--- a/ddsp/training/inference.py
+++ b/ddsp/training/inference.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 c2bbec66..6b603ef0 100644
--- a/ddsp/training/metrics.py
+++ b/ddsp/training/metrics.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 c6ded967..cc885712 100644
--- a/ddsp/training/metrics_test.py
+++ b/ddsp/training/metrics_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 8553e31c..268a2edd 100644
--- a/ddsp/training/models/__init__.py
+++ b/ddsp/training/models/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 22d43a03..4ca89e84 100644
--- a/ddsp/training/models/autoencoder.py
+++ b/ddsp/training/models/autoencoder.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 db90fbef..a03fbacd 100644
--- a/ddsp/training/models/autoencoder_test.py
+++ b/ddsp/training/models/autoencoder_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 e8122dae..16e6aed4 100644
--- a/ddsp/training/models/inverse_synthesis.py
+++ b/ddsp/training/models/inverse_synthesis.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 1573cb74..4a58746c 100644
--- a/ddsp/training/models/midi_autoencoder.py
+++ b/ddsp/training/models/midi_autoencoder.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 999333f1..e7596ca6 100644
--- a/ddsp/training/models/model.py
+++ b/ddsp/training/models/model.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 cd7f155c..f571c80d 100644
--- a/ddsp/training/nn.py
+++ b/ddsp/training/nn.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 8e898db1..1c28ffbb 100644
--- a/ddsp/training/nn_test.py
+++ b/ddsp/training/nn_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 76fc64ba..070da51b 100644
--- a/ddsp/training/plotting.py
+++ b/ddsp/training/plotting.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 a4cc6ff6..4307a380 100644
--- a/ddsp/training/postprocessing.py
+++ b/ddsp/training/postprocessing.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 9f47cf1a..01854aa0 100644
--- a/ddsp/training/preprocessing.py
+++ b/ddsp/training/preprocessing.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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.
@@ -179,13 +179,15 @@ def __init__(self,
     # Crepe model, must either be a model size or path to SavedModel.
     if crepe_saved_model_path:
       self.crepe_model = ddsp.spectral_ops.PretrainedCREPE(
-          model_size_or_path=crepe_saved_model_path, hop_size=self.hop_size)
+          model_size_or_path=crepe_saved_model_path, hop_size=self.hop_size
+      )
 
     # Use viterbi decoding.
     self.viterbi = viterbi
 
-  def call(self, audio, f0_hz=None, f0_confidence=None, audio_16k=None) -> [
-      'f0_hz', 'pw_db', 'f0_scaled', 'pw_scaled', 'f0_confidence']:
+  def call(
+      self, audio, f0_hz=None, f0_confidence=None, audio_16k=None, pw_db=None
+  ) -> ['f0_hz', 'pw_db', 'f0_scaled', 'pw_scaled', 'f0_confidence']:
     """Compute power on the fly if it's not in the inputs."""
     # Compute features at 16kHz (needed for CREPE).
     if audio_16k is not None:
diff --git a/ddsp/training/preprocessing_test.py b/ddsp/training/preprocessing_test.py
index 79fa2150..d3f2d7a0 100644
--- a/ddsp/training/preprocessing_test.py
+++ b/ddsp/training/preprocessing_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 07c4564d..7007deb4 100644
--- a/ddsp/training/summaries.py
+++ b/ddsp/training/summaries.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 ec6f4eed..3ae342f3 100644
--- a/ddsp/training/train_util.py
+++ b/ddsp/training/train_util.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 d60c5b9d..25dbdb9c 100644
--- a/ddsp/training/trainers.py
+++ b/ddsp/training/trainers.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 9e6007c8..ed88c3e2 100644
--- a/ddsp/version.py
+++ b/ddsp/version.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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/pylintrc b/pylintrc
index 9b53f103..e44f0a52 100644
--- a/pylintrc
+++ b/pylintrc
@@ -119,6 +119,7 @@ disable=abstract-method,
         old-octal-literal,
         old-raise-syntax,
         parameter-unpacking,
+        possibly-used-before-assignment,
         print-statement,
         raise-missing-from,
         raising-string,
diff --git a/setup.py b/setup.py
index 526278a1..2cc529f7 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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 71b6e5f8..634cb6ee 100644
--- a/update_gin_config.py
+++ b/update_gin_config.py
@@ -1,4 +1,4 @@
-# Copyright 2023 The DDSP Authors.
+# Copyright 2024 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.