On my new mac studio with macOS 13 (Ventura), I cannot get phonemes from text. startSpeakingString is working well, but phonemesFromText always returns nil. From the console log:
NSSpeechSynthesizer: [NSSpeechSynthesizer phonemesFromText:] - Error -50
[aqme] AQMEIO_HAL.cpp:736 kAudioDevicePropertyMute returned err 2003332927
I reinstalled the system, but the problem remains. Any ideas?