Audiokit: AKMicrophone is crashing with Fatal Exception: com.apple.coreaudio.avfaudio required condition is false: IsFormatSampleRateAndChannelCountValid

[TheHiddenDuck]

This happens in the wild across all iOS device and I was never able to reproduce it on any of my devices.

I saw there was an update with optional initializer for AKMicrophone, but it still fails for me with a fatal error at the following line in the init?:

AudioKit.engine.connect(AudioKit.engine.inputNode, to: self.avAudioNode, format: format)

If there is no way to avoid this is there at least a way to handle this gracefully?

Fatal Exception: com.apple.coreaudio.avfaudio
0 CoreFoundation 0x19e198518 __exceptionPreprocess
1 libobjc.A.dylib 0x19d3739f8 objc_exception_throw
2 CoreFoundation 0x19e0b2148 +[_CFXNotificationTokenRegistration keyCallbacks]
3 AVFAudio 0x1a3f59438 AVAE_RaiseException(NSString, ...)
4 AVFAudio 0x1a3f58a70 _AVAE_Check(char const, int, char const, char const, bool)
5 AVFAudio 0x1a3ff9268 AVAudioIONodeImpl::SetOutputFormat(unsigned long, AVAudioFormat)
6 AVFAudio 0x1a3f893c8 AVAudioEngineGraph::_Connect(AVAudioNodeImplBase, AVAudioNodeImplBase, unsigned int, unsigned int, AVAudioFormat)
7 AVFAudio 0x1a4000e9c AVAudioEngineImpl::Connect(AVAudioNode, AVAudioNode, unsigned long, unsigned long, AVAudioFormat*)
8 AVFAudio 0x1a4000f24 -[AVAudioEngine connect:to:format:]
9 PerfectEar 0x104b8e7d8 AKMicrophone.init(with:) (AKMicrophone.swift:64)
10 PerfectEar 0x1048bf3f8 PitchTrackerNode.setup() (PitchTrackerNode.swift:41)

[YahangWu]

https://github.com/AudioKit/AudioKit/issues/1556#issuecomment-436091306

[TheHiddenDuck]

Update. Actually, my mistake, after updating to latest changes, the exception code has indeed changed to "IsFormatSampleRateAndChannelCountValid(hwFormat)".

[aure]

So I am not able to reproduce this. Can you supply a sample project that causes this issue so I can test? I'll reopen the issue with new info.

[ghost]

It's very simple to reproduce this. start a call to someone. then run app with code 'let mic = AKMicrophone()'.

[tcwalther]

@aure I can confirm that I can reproduce this using the method @ghubaddole described.

[Panl]

@aure I have the same issue, when make a phone call and I start my app which initialize AKMicrophone, it crashes. Any suggestion to avoid the situation ? thanks.

[nhhthuanck]

I have the same issue, I start my app which initialize AKMicrophone, it crashes. Any suggestion to avoid the situation ? thanks you very much

[adamup928]

I can also confirm this issue occurs if a microphone is instantiated while on a phone call. I've tried to catch the error but have been unsuccessful so far.

@aure - Can we reopen this issue for visibility?

[adamup928]

I'm able to prevent the crash and successfully instantiate a microphone while on a phone call by explicitly setting the AVAudioSession category and active state immediately before setting the sampleRate of AKSettings and instantiating an AKMicrophone

Here's what it looks like:

let audioSession = AVAudioSession.sharedInstance()
do {
     try audioSession.setCategory(.playAndRecord)
     try audioSession.setActive(true, options: .notifyOthersOnDeactivation)
} catch {
     print("setting category or active state failed")
}

let inputAudioFormat = AudioKit.engine.inputNode.inputFormat(forBus: 0)
AKSettings.sampleRate = inputAudioFormat.sampleRate

self.mic = AKMicrophone()

Also, I have AKSettings.disableAVAudioSessionCategoryManagement set to false.

[aure]

AKMicrophone is being removed from AudioKit due to issues like this. The new one is more stable and simple.

[Thomas-Vos]

What is the alternative for AKMicrophone in v5?

[aure]

engine.input