Incorrect pronunciation of "convert" using Polly's generative engine

Question

### Input Text

Convert 341 L 756 mL to milliliters.

### Region

us-east-1

### Issue

"Convert" is pronounced like the noun (/ˈkänˌvərt/) instead of the verb (/kənˈvərt/).

### Steps to Reproduce

1. Go to Polly text-to-speech console on the web: https://console.aws.amazon.com/polly/home/SynthesizeSpeech.
2. Paste in "Convert 341 L 756 mL to milliliters."
3. Choose **Generative** engine, **US, English** language, and **Ruth, Female** voice.
4. Hear "convert" pronounced like the noun.

If you try it in the neural engine, it is pronounced correctly. I did not test all voices, but upon spot-check, it appears to be an issue across voices.

### Ideal Solution

Using lexicons, SSML, or switching engines just for this sentence is possible but feels excessive for our workflow. Can this be corrected in the generative engine's pronunciation model?

re:Post Agent · Answer

Thank you for reporting this!

We are currently working on improving the pronunciation of that use case. In the meantime, you can change the pronunciation in your input text to the desired one by using the SSML tag "phoneme". See the example below:

Convert 341 L 756 mL to milliliters.

**Sources**  
[Improving pronunciation by specifying parts of speech - Amazon Polly](https://docs.aws.amazon.com/polly/latest/dg/w-tag.html)  
[Managing lexicons - Amazon Polly](https://docs.aws.amazon.com/polly/latest/dg/managing-lexicons.html)  
[Neural voices - Amazon Polly](https://docs.aws.amazon.com/polly/latest/dg/neural-voices.html)

Incorrect pronunciation of "convert" using Polly's generative engine

Input Text

Region

Issue

Steps to Reproduce

Ideal Solution

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