Because the title suggests I’m utilizing AVAudioEngine for SFSpeechRecognition enter & AVAudioPlayer for sound output.

Apple says on this discuss that the setVoiceProcessingEnabled perform very usefully cancels the output from speaker to the mic. I set voiceProcessing on the AVAudioInputNode and AVAudioOutputNode.

When operating xcode when speechRecognitionEnabled:YES throws the next error:

throwing 18,446,744,073,709,551,615
  from AU (0x13bf98dd0): auou/vpio/appl, render err: 18,446,744,073,709,551,615

There isn’t any error thrown when organising the nodes and it appears to work nevertheless the quantity is low, even when the system quantity is turned up. Any answer to this might be a lot appreciated.

I attempted varied AVAudioEngine node setups. One setup with a mixer node and one with out. I’m anticipating the audio ranges to be loud, along side the system quantity.