7 Replies
Leslie McKerchie

Hi Christopher,

Thanks for reaching out and letting us know what you would like to use in the text to speech tool. This is not available at this time, but we are tracking a feature request for some additional functionality, such as speed control and emphasis.

I've added this conversation to the report as we track user impact and so that we can share any updates with you here.

I wanted to share some information about how we manage these feature requests as that may be helpful.

Thor Melicher

I recently created an application that might address the need of adjusting the speed for Text to Speech in Storyline and the ability to add emphasis to words by using SSML tags.  It’s a bit of a workaround though as you’ll have to go to the source that Storyline uses, Amazon Polly voices.  

Here’s what you do:

  1. Get an Amazon Polly account (yes, there is some cost involved but doesn’t seem that prohibitive) (https://aws.amazon.com/polly/)
  2. Save your scripts as separate files (MS-Word or Text)
  3. Download HeroVoice TTS from the Microsoft Windows Store (fully functioning 15-day free trial)
  4. Encode your files with HeroVoice TTS – apply a global setting for speed and even comma duration so your files are consistent.
  5. Select the voice you want – these are the same as you’ll find in Storyline today including Neural voices (which aren’t currently available in Storyline)
  6. Load each audio file into Storyline 

The supported SSML tags in Amazon Polly is a good resource as it will let you know which tags are supported for each voice type (Standard or Neural).  The Neural voices are a higher quality voice and *don't* support the SSML emphasis tag.