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macOS [NSSpeechSynthesizer] how to check if rate for active voice is setable?

O

officerdick

macrumors regular
Original poster
May 4, 2006
136
0
I am working my way through hilegass book, and doing the speakline app now. I am trying to extend on its functionality. I added a slider so i can set the rate, this slider is disabled when the mac is speaking, though i would like to disable it if the active voice rate cant be changed. I looked in the documentation and aperantly there exists some strings that hold values for the different voices, i thought checking for NSSpeechRateProperty would be the most plausible, but it just returns "null" no matter the voice, any one care to help?
 
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