(Stable) I/O Functions Migration
Since the 0.6 release, we have continuously improved I/O functionality. Specifically, in 0.8 we changed the default backend from “sox” to “sox_io” and applied the same switch to API of the “soundfile” backend. The 0.9 release concludes this migration by removing the deprecated backends. For more details, please refer to #903. 
(Beta) Wav2Vec2.0 Model