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Audio format for sounds?

I've had no audio on Duolingo for the past few days. Neither voiceover nor effects.

What format are the sounds in Duolingo, so I can start diagnosis?

[Firefox browser, Linux o/s]

June 20, 2017



Duolingo Help Center web page "Duolingo's New Website"

Speaking exercises on the new website only work on browsers that support the Web Speech API, the most popular being Chrome. Unfortunately, the old speech system was outdated and a burden on our system. If you use the Chrome browser, you will get speaking exercises again.


Firefox explicitly supports WebSpeech API



I can play full sentences in the exercises by clicking the 'speaker' icon, no problem.

However, hovering over a word does not play that word, nor do I hear the sound effects for correct/incorrect.

..which seems strange that the synthesiser works for some objects and not for others...


I'll answer my own question!

It was solved by moving over to the PaleMoon browser, instead of Firefox - even though they're both based on Mozilla...

It also /seems/ to have cured issues with 'New Question' not working within a topic, if there are no pre-existing questions.

So hurrah! PaleMoon, and Booooo! to Firefox.

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