public java.lang.String getTune() {
        java.lang.Object ref = tune_;
        if (!(ref instanceof java.lang.String)) {
          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
          java.lang.String s = bs.toStringUtf8();
          tune_ = s;
          return s;
        } else {
          return (java.lang.String) ref;
        }
      }
<pre>
Set the denoiser mode. The default is `standard`.

Supported denoiser modes:

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

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

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