public com.google.cloud.texttospeech.v1beta1.SynthesizeSpeechRequest.TimepointType
                convert(java.lang.Integer from) {
              com.google.cloud.texttospeech.v1beta1.SynthesizeSpeechRequest.TimepointType result =
                  com.google.cloud.texttospeech.v1beta1.SynthesizeSpeechRequest.TimepointType
                      .forNumber(from);
              return result == null
                  ? com.google.cloud.texttospeech.v1beta1.SynthesizeSpeechRequest.TimepointType
                      .UNRECOGNIZED
                  : result;
            }
<pre>
Required. The configuration of the synthesized audio.
</pre>

<code>
.google.cloud.texttospeech.v1beta1.AudioConfig audio_config = 3 [(.google.api.field_behavior) = REQUIRED];
</code>
java-texttospeech/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesizeSpeechRequest.java