Audiokit: AvAudio error required condition is false: hwFormat - AVAudioIONodeImpl.mm:365

[NadirBertolasi]

I have a problem starting audio record, after the use of AudioKit for sound reproduction.

Basically I have an app that performs some analysis using pure AVFoundation. Than some equalization is performed with AudioKit and an output signal is played. It all works perfectly.

Than if I try to come back to analysis stage I get this error when I use AudioOutputUnitStart(..)

[central] 54:   ERROR:    [0x16e283000] >avae> AVAudioIONodeImpl.mm:365: _GetHWFormat: required condition is false: hwFormat
*** Terminating app due to uncaught exception 'com.apple.coreaudio.avfaudio', reason: 'required condition is false: hwFormat'

I Think is related to somemething not correctly uninitialized on AudioKit stop I am shure AudioKit.stop()is called when I come back to analysis than I setup again audio session and audio unit.

Any tip regarding this conflict ?

[aure]

What filters are you using? Apple's Band Pass Filter creates this error, so I am wondering if that is part of your equalization.

[NadirBertolasi]

Thankyou Aure for the answer.

I'm using AKParametricEQ, which make use of AUParametricEQ native filter. I don't think a band pass filter is involved in this kind of processing... Please help me, this problem is really frustrating

Thanks

[aure]

We ended up dropping Apple's ParametricEQ due to problems discussed here: https://github.com/audiokit/AudioKit/issues/723 Maybe you could try AudioKit's filters instead.

[aure]

Anyway, I think this is a problem with the lifecycle of the app, is there anyway you can leave the audio engine running in a singleton class?

[NadirBertolasi]

Thank you for the answer,

Well I will try to handle the lifecycle in a singleton class, hope it solves. Also interesting the Apple's ParametricEQ, I will look for another way.

Thank you for the support

[doriansgithub]

This is happening to us, but ONLY in the device. It runs properly in the simulator. Any ideas how that is possible?

[doriansgithub]

Nadir, were you able to solve it with the singleton?

[NadirBertolasi]

Hi Dorian, the problem is an iOS bug which is still open. You can find here a work around I adopted:

http://stackoverflow.com/questions/42470848/coreaudio-crash-avaudioionodeimpl-mm365-gethwformat-required-condition-is

Hope it helps

[doriansgithub]

Thanks, checking it out now.

[doriansgithub]

It worked like a charm! All my three different views work without crashing! You dMan! Thanks!!!