public void setOutputFormat(String outputFormat) {
        this.outputFormat = outputFormat;
    }
<p>
The format in which the returned output will be encoded. For audio stream, this will be mp3, ogg_vorbis, or pcm.
For speech marks, this will be json.
</p>
<p>
When pcm is used, the content returned is audio/pcm in a signed 16-bit, 1 channel (mono), little-endian format.
</p>

@param outputFormat
       The format in which the returned output will be encoded. For audio stream, this will be mp3, ogg_vorbis,
       or pcm. For speech marks, this will be json. </p>
       <p>
       When pcm is used, the content returned is audio/pcm in a signed 16-bit, 1 channel (mono), little-endian
       format.
@see OutputFormat
aws-java-sdk-polly/src/main/java/com/amazonaws/services/polly/model/SynthesizeSpeechRequest.java