cvoice.xml

<!-- Voice selects Style by name.-->
<!-- https://docs.aws.amazon.com/polly/latest/dg/supportedtags.html -->
<voice style="chill" id="Salli" engine="standard" language="en-US" xmlns:amazon="amazon">
    <style name="base"> <!-- Style start -->
        <speak> <!-- SSML start -->
            <prosody rate="100%">
                {text}
            </prosody>
        </speak>
    </style>
    <style name="chill">
        <speak>
            <amazon:auto-breaths volume="medium" frequency="medium" duration="short">
                <amazon:effect vocal-tract-length="105%">
                    <amazon:effect phonation="soft">
                        <prosody rate="100%">
                            {text}
                        </prosody>
                    </amazon:effect>
                </amazon:effect>
            </amazon:auto-breaths>
        </speak>
    </style>
    <style name="rush">
        <speak>
            <amazon:effect vocal-tract-length="100%">
                <prosody rate="105%">
                    {text}
                </prosody>
            </amazon:effect>
        </speak>
    </style>
</voice>