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samples/README.md

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+The audio files in this folder are provided for toolbox testing and
+benchmarking purposes. These are the same reference utterances
+used by the SV2TTS authors to generate the audio samples located at:
+https://google.github.io/tacotron/publications/speaker_adaptation/index.html
+
+The `p240_00000.mp3` and `p260_00000.mp3` files are compressed
+versions of audios from the VCTK corpus available at:
+https://datashare.is.ed.ac.uk/handle/10283/3443
+VCTK.txt contains the copyright notices and licensing information.
+
+The `1320_00000.mp3`, `3575_00000.mp3`, `6829_00000.mp3`
+and `8230_00000.mp3` files are compressed versions of audios
+from the LibriSpeech dataset available at: https://openslr.org/12
+For these files, the following notice applies:
+```
+LibriSpeech (c) 2014 by Vassil Panayotov
+
+LibriSpeech ASR corpus is licensed under a
+Creative Commons Attribution 4.0 International License.
+
+See <http://creativecommons.org/licenses/by/4.0/>.
+```