It is most probably bug in iOS 16: https://github.com/robbiehanson/CocoaAsyncSocket/issues/803

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