Add test files.

README.md

@@ -5,3 +5,27 @@ Refer to <https://github.com/k2-fsa/icefall/tree/master/egs/yesno/ASR>
 for more information about this pre-trained model.
 
 You can find usage instructions there.
+
+
+## Sound files for testing the pre-trained model
+
+The folder `test_waves` contains test sound files. They
+are downloaded from <https://www.openslr.org/1/>.
+
+There are 60 files in the dataset, 30 are used for training.
+The remaining 30 files, contained in `test_waves` are kept for testing.
+
+The code for splitting the dataset can be found at
+<https://github.com/lhotse-speech/lhotse/blob/master/lhotse/recipes/yesno.py#L138>
+
+```python
+wave_files = list(corpus_dir.glob("*.wav"))
+assert len(wave_files) == 60
+
+wave_files.sort()
+train_set = wave_files[::2]
+test_set = wave_files[1::2]
+
+assert len(train_set) == 30
+assert len(test_set) == 30
+```