'Error updating tree format' when using iOS SoundAnalysis Framework

Question

I'm using the SoundAnalysis framework in conjunction with a CoreML model I created using CreateML.

I was able to use SNAudioFileAnalyzer to perform an analysis on audio files embedded in the app bundle, but not when using SNAudioStreamAnalyzer on live audio from the microphone.

when using the code below:

    // Create a new audio engine.
    audioEngine = AVAudioEngine()

    //https://forums.developer.apple.com/thread/44833
    audioEngine.mainMixerNode

    do {
        // Start the stream of audio data.
        try audioEngine.start()
    } catch {
        print("Unable to start AVAudioEngine: \(error.localizedDescription)")
    }

    // Get the native audio format of the engine's input bus.
    let inputFormat = audioEngine.inputNode.inputFormat(forBus: 0)

    // Create a new stream analyzer.
    var streamAnalyzer = SNAudioStreamAnalyzer(format: inputFormat)

I'm getting an error at the last line of:

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Error updating tree format'

Anyone have any idea? Right now there isn't much written about the SoundAnalysis Framework, so feeling somewhat out in the woods on this one.

Are you using the `main thread` ? apparently SNAudioStreamAnalyser need the main thread — Thomas Besnehard, Oct 22 '19 at 16:30
@ThomasBesnehard yes; all that code is inside a method that gets called from viewDidLoad() — narner, Oct 22 '19 at 21:01

score 2 · Accepted Answer · answered Nov 04 '19 at 11:51

2

I just got ride of the error by setting AVAudioSession.sharedInstance().setCategory(.playAndRecord)

answered Nov 04 '19 at 11:51

CedricSoubrie

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Yup, that seems to solve that particular issue so marked as correct (though now getting a different error of: *** Terminating app due to uncaught exception 'com.apple.coreaudio.avfaudio', reason: 'required condition is false: inputNode != nullptr || outputNode != nullptr') – narner Nov 04 '19 at 17:03
2

I also got this error :-) It means your engine doesn't have any input or output when you start it. In my case, I had the error because I was calling `audioEngine.start()` before `audioEngine.inputNode.installTap()` – CedricSoubrie Nov 05 '19 at 12:26

score 1 · Answer 2 · answered Oct 22 '19 at 15:56

1

I've got the same error, it seam to be around let inputFormat = audioEngine.inputNode.inputFormat(forBus: 0), but no more info for now.

answered Oct 22 '19 at 15:56

Thomas Besnehard

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score 0 · Answer 3 · answered Jun 10 '20 at 00:45

0

I had the exact same error, pretty obvious for my case this was because I was testing on simulator with no built-in microphone input. I got rid of this once I switched to real device.

answered Jun 10 '20 at 00:45

Malloc

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score 0 · Answer 4 · answered Feb 24 '21 at 16:22

0

I experienced this same exception with very similar init code running on the simulator. For me the problem disappeared after I simply restarted the simulator (Device > Restart).

answered Feb 24 '21 at 16:22

jengelsma

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'Error updating tree format' when using iOS SoundAnalysis Framework

4 Answers4