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Challenge: Speech Synthesizer Simulator

AVSpeechSynthesizer is the engine that helps generate synthetic speech on iOS. Screen readers like VoiceOver rely on speech synthesis to help communicate information about items on the screen. It’s a foundational aspect for assistive technology, and a valuable tool for creating accessible apps and augmenting existing experiences for people and those who uses assistive technology.

We’re inviting you to take AVSpeechSynthesizer for a spin out into the world. Using our ARKit-powered sample app, design a conversation between two animated birds, powered entirely by speech synthesis. You pick the scene, and the script.

Begin the challenge

To join this challenge, download the sample project and add the app to your iPhone. Choose where you want to film your conversation, as well as the tone and style. And don’t forget a set of dynamic and entertaining dialogue.

Download the Speech Synthesizer Simulator Challenge sample app

Your scene could be an exchange between friends, a romantic comedy, or even an award-winning drama. While AVSpeechSynthesizer can read any string, keep your scenes respectful and inclusive. There’s no limit to what you can make, and we’re looking forward to learning what brilliant and funny scenes you create. And, for a bit of extra fun, try exploring some of the synthesizer properties to achieve different tones and inflections!

Once you’ve staged and directed your scene, do a screen recording and share your creation with the developer community. For those participating in the Digital Lounges, We’re hosting a Challenge Study Hall in the #accessibility-study-hall channel from 9 a.m. – 1 p.m. PDT on Tuesday. You can also share your progress on the Developer Forums using the tag “WWDC21-Challenges,” or on social media using the hashtag #WWDC21Challenges.

Register for the Digital Lounges

Visit the Accessibility Digital Lounge (Requires registration)

Explore WWDC21 Challenges on the Developer Forums

Explore #WWDC21Challenges on social media



AVSpeechSynthesizer: Making iOS Talk


Create a seamless speech experience in your apps

Read the WWDC21 Challenges Terms and Conditions

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