CODEWITHSUNDEEP
iosswiftavspeechsynthesizer
marcgg
marcgg

Reputation: 66455

AVSpeechSynthesisVoice not working for some users

In my iOS app most users can hear the AVSpeechSynthesisVoice correctly, but some report that it simply does not work. I haven't been able to reproduce the issue locally, but here is how I use the API:

let sentence = "the sentence to be told"

let synthesizer = AVSpeechSynthesizer()

let utterance = AVSpeechUtterance(string: sentence)
utterance.voice = AVSpeechSynthesisVoice(
  language: "en-GB"
)
utterance.rate = AVSpeechUtteranceDefaultSpeechRate * 1.05

synthesizer.speak(utterance)

This works perfectly fine on iOS 13 (tested most minors), all iOS 14 versions, all the devices I could find... but I keep getting reports of people not getting any audio feedback.

Do you have any pointers on where to look, or at least reproduce the issue?

Upvotes: 1

Views: 700

Answers (2)

meh
meh

Reputation: 22479

After playing with the API I found that setting the usesApplicationAudioSession flag to false in the instance of AVSpeechSynthesizer.

Add the following line to your code:

synthesizer.usesApplicationAudioSession = false

The issue seems to be caused by the device being on 'silent mode'.

Upvotes: 2

Anish
Anish

Reputation: 667

Does your app support localisation? I had a similar issue. In my case whenever user changes the app language to Simplified-Chinese the text used to get localised so, I had to change the AVSpeechSynthesisVoice(language: "zh-TW") as well.

You can get the list of languages from here.

Upvotes: 1

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