AVSpeechUtterance (Text to Speech) volume seems to increase when reading out sentences on iPhone 7 / iOS 10 using Swift -


i had dig around while couldn't find out there.

i'm working in swift 3 , using avspeechutterance in project , have come across appears anomaly. whilst testing voice playback on few iphone 7s running ios 10, volume of sentences seems increasing drastically longer sentence goes on.

i've tried setting volume set value e.g. float per docs here nothing seems fix issue.

here's snippet of code. 

let synth = avspeechsynthesizer() synth.speak(avspeechutterance(string: "testing out string. becomes louder.")

does know workarounds or causes of seems working fine on iphone 6 running ios 11.


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