@java.lang.Override
    public com.google.cloud.texttospeech.v1beta1.AudioEncoding getAudioEncoding() {
      com.google.cloud.texttospeech.v1beta1.AudioEncoding result =
          com.google.cloud.texttospeech.v1beta1.AudioEncoding.forNumber(audioEncoding_);
      return result == null
          ? com.google.cloud.texttospeech.v1beta1.AudioEncoding.UNRECOGNIZED
          : result;
    }
<pre>
Required. The format of the audio byte stream.
For now, streaming only supports PCM and OGG_OPUS. All other encodings
will return an error.
</pre>

<code>
.google.cloud.texttospeech.v1beta1.AudioEncoding audio_encoding = 1 [(.google.api.field_behavior) = REQUIRED];
</code>

@return The audioEncoding.
java-texttospeech/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/StreamingAudioConfig.java