public Builder mergeAudio(com.google.cloud.speech.v1p1beta1.RecognitionAudio value) {
      if (audioBuilder_ == null) {
        if (((bitField0_ & 0x00000002) != 0)
            && audio_ != null
            && audio_ != com.google.cloud.speech.v1p1beta1.RecognitionAudio.getDefaultInstance()) {
          getAudioBuilder().mergeFrom(value);
        } else {
          audio_ = value;
        }
      } else {
        audioBuilder_.mergeFrom(value);
      }
      if (audio_ != null) {
        bitField0_ |= 0x00000002;
        onChanged();
      }
      return this;
    }
<pre>
Required. The audio data to be recognized.
</pre>

<code>
.google.cloud.speech.v1p1beta1.RecognitionAudio audio = 2 [(.google.api.field_behavior) = REQUIRED];
</code>
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/LongRunningRecognizeRequest.java