Using the write method from AVSpeechSynthesizer produces the following error:
[AXTTSCommon] TTSPlaybackEnqueueFullAudioQueueBuffer: error -66686 enqueueing buffer
This issue has first been seen on iOS 16.
More information and code snippet:
https://stackoverflow.com/questions/73716508/play-audio-buffers-generated-by-avspeechsynthesizer-directly