@java.lang.Override
  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
    Builder builder = new Builder(parent);
    return builder;
  }
<pre>
Optional. Input only. An identifier which selects 'audio effects' profiles
that are applied on (post synthesized) text to speech. Effects are applied
on top of each other in the order they are given. See
[audio
profiles](https://cloud.google.com/text-to-speech/docs/audio-profiles) for
current supported profile ids.
</pre>

<code>
repeated string effects_profile_id = 6 [(.google.api.field_behavior) = INPUT_ONLY, (.google.api.field_behavior) = OPTIONAL];
</code>

@param index The index of the value to return.
@return The bytes of the effectsProfileId at the given index.
java-texttospeech/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/AudioConfig.java