public com.google.protobuf.ByteString getTuneBytes() {
        java.lang.Object ref = tune_;
        if (ref instanceof String) {
          com.google.protobuf.ByteString b =
              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
          tune_ = b;
          return b;
        } else {
          return (com.google.protobuf.ByteString) ref;
        }
      }
<pre>
Set the denoiser mode. The default is `standard`.

Supported denoiser modes:

- `standard`
- `grain`
</pre>

<code>string tune = 2;</code>

@return The bytes for tune.
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/PreprocessingConfig.java