How to control voice speed in Polly's neural voices?

Question

Hi, in Amazon Polly console, I noticed that the voice speed tag prosody rate doesn't work for neural voices. How can I change voice speed?  For example, the new neural italian voice "Adriano", wich is beautiful, is unfortunately very fast and doesn't sound natural at the default rate, I would like to slow down it. How can I do? Thank you.

Answer

Hi, as per [documentation](https://docs.aws.amazon.com/polly/latest/dg/supportedtags.html#prosody-tag):
> Prosody tag attributes are fully supported by the standard TTS voices. **Neural voices support the `volume` and `rate` attributes**, but don't support the `pitch` attribute.

(emphasis mine)

I just successfully synthesized below, observing slower speaking rate:
```xml

Ciao! Mi chiamo Adriano, e posso leggerti qualsiasi testo tu mi scriva.

```

How to control voice speed in Polly's neural voices?

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