chore: import upstream snapshot with attribution

contributing/samples/live/live_bidi_debug_utils/pcm_audio_player.py

@@ -0,0 +1,39 @@
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import numpy as np
+import sounddevice as sd
+
+# input audio example. replace with the input audio you want to test
+FILE_PATH = 'adk_live_audio_storage_input_audio_1762910896736.pcm'
+# output audio example. replace with the input audio you want to test
+FILE_PATH = 'adk_live_audio_storage_output_audio_1762910893258.pcm;rate=24000'
+# PCM rate is always 24,000 for input and output
+SAMPLE_RATE = 24000
+CHANNELS = 1
+DTYPE = np.int16  # Common types: int16, float32
+
+# Read and play
+with open(FILE_PATH, 'rb') as f:
+  # Load raw data into numpy array
+  raw_data = f.read()
+  audio_array = np.frombuffer(raw_data, dtype=DTYPE)
+
+  # Reshape if stereo (interleaved)
+  if CHANNELS > 1:
+    audio_array = audio_array.reshape((-1, CHANNELS))
+
+  # Play
+  print('Playing...')
+  sd.play(audio_array, SAMPLE_RATE)
+  sd.wait()