I get the same error 1107 when trying to recognize m4a file having length 6 min, 1.5 MB. Around 2 mins of audio is recognized ok, then failure always happens in the same place.
In Console app I see the following messages:
EXC_RESOURCE -> localspeechrecognition[17858] exceeded mem limit: ActiveSoft 300 MB (non-fatal)
155685.706 memorystatus: killing_highwater_process pid 17858 [localspeechrecognition] (highwater 10) 315553KB - memorystatus_available_pages: 33068 compressor_size:63118
Process localspeechrecognition [17858] killed by jetsam reason highwater
So it seems there is some memory limit for speech recognition process. I don't know if hitting 300 MB limit is adequate for such audio file.
iOS 16.7.2
John47377
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It is most probably bug in iOS 16: https://github.com/robbiehanson/CocoaAsyncSocket/issues/803