@java.lang.Override
  public com.google.protobuf.ByteString getOriginalMimeTypeBytes() {
    java.lang.Object ref = originalMimeType_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      originalMimeType_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }
<pre>
Mime type of the original audio file.  For example `audio/m4a`,
`audio/x-alaw-basic`, `audio/mp3`, `audio/3gpp`.
A list of possible audio mime types is maintained at
http://www.iana.org/assignments/media-types/media-types.xhtml#audio
</pre>

<code>string original_mime_type = 8;</code>

@return The bytes for originalMimeType.
java-speech/proto-google-cloud-speech-v1/src/main/java/com/google/cloud/speech/v1/RecognitionMetadata.java