Add test for #1021

test/torchaudio_unittest/sox_effect/dataset_test.py

@@ -2,6 +2,7 @@
 import platform
 from unittest import skipIf
 from typing import List, Tuple
+from concurrent.futures import ProcessPoolExecutor
 
 import numpy as np
 import torch
@@ -122,3 +123,23 @@ def test_apply_effects_tensor(self):
         )
         for batch in loader:
             assert batch.shape == (32, 2, 2 * sample_rate)
+
+
+@skipIfNoExtension
+class TestProcessPoolExecutor(PytorchTestCase):
+    @staticmethod
+    def _speed():
+        sample_rate = 16000
+        wav = get_whitenoise(n_channels=1, sample_rate=sample_rate, duration=1, dtype='float')
+        effects = [
+            ['speed', '1.03756523535464655'],
+            ['rate', f'{sample_rate}'],
+        ]
+        return torchaudio.sox_effects.apply_effects_tensor(wav, sample_rate, effects)[0]
+
+    def test_executor(self):
+        """Test that apply_effects_tensor with speed + rate does not crush
+
+        https://github.com/pytorch/audio/issues/1021
+        """
+        ProcessPoolExecutor(1).submit(TestProcessPoolExecutor._speed).result()