SolvedAudioKit AKMicrophone fails to initialize

vanshg
1755

AudioKit version: 4.5.2
macOS version: 10.14
Xcode version: 10.0

I have some microphone recording code for a project (which can be seen here: https://github.com/vanshg/MacAssistant/blob/master/MacAssistant/Audio/AudioEngine.swift). This code works fine on my friend's laptop (Mid-2015 MacBook Pro). However, when trying to run this on my laptop (2018 MacBook Pro), it crashes upon initialization of AKMicrophone, before starting the AudioKit engine (Both laptops are running the same version of AudioKit, macOS, and Xcode). I thought this might be an issue with the specific code I had written, so I made a simple new project with only the following code:

import Cocoa
import AudioKit

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
    let mic = AKMicrophone()
    @IBOutlet weak var window: NSWindow!
    func applicationDidFinishLaunching(_ aNotification: Notification) {
        AudioKit.output = AKBooster(mic)
        print("Start recording")
        try? AudioKit.start()
        
    }
}

and it continues to crash. The stack trace I get for this specific piece of code (and for my project) is:

2018-10-27 22:57:55.870774-0700 TestAudioKit[14733:224871] [avae] AVAEInternal.h:70:_AVAE_Check: required condition is false: [AVAudioIONodeImpl.mm:911:SetOutputFormat: (format.sampleRate == hwFormat.sampleRate)]
2018-10-27 22:57:55.872674-0700 TestAudioKit[14733:224871] [General] An uncaught exception was raised
2018-10-27 22:57:55.872690-0700 TestAudioKit[14733:224871] [General] required condition is false: format.sampleRate == hwFormat.sampleRate
2018-10-27 22:57:55.872763-0700 TestAudioKit[14733:224871] [General] (
	0   CoreFoundation                      0x00007fff3e10443d __exceptionPreprocess + 256
	1   libobjc.A.dylib                     0x00007fff6a015720 objc_exception_throw + 48
	2   CoreFoundation                      0x00007fff3e11f08e +[NSException raise:format:arguments:] + 98
	3   AVFAudio                            0x00007fff3a18bbac _Z19AVAE_RaiseExceptionP8NSStringz + 156
	4   AVFAudio                            0x00007fff3a191bbb _Z11_AVAE_CheckPKciS0_S0_b + 323
	5   AVFAudio                            0x00007fff3a1df053 _ZN17AVAudioIONodeImpl15SetOutputFormatEmP13AVAudioFormat + 349
	6   AVFAudio                            0x00007fff3a1bf773 _ZN18AVAudioEngineGraph8_ConnectEP19AVAudioNodeImplBaseS1_jjP13AVAudioFormat + 1653
	7   AVFAudio                            0x00007fff3a1c329e _ZN18AVAudioEngineGraph22ConnectMultipleOutputsEP11AVAudioNodeP7NSArraymP13AVAudioFormat + 3370
	8   AVFAudio                            0x00007fff3a1e75d7 _ZN17AVAudioEngineImpl22ConnectMultipleOutputsEP11AVAudioNodeP7NSArraymP13AVAudioFormat + 673
	9   AVFAudio                            0x00007fff3a1e72ee -[AVAudioEngine connect:toConnectionPoints:fromBus:format:] + 94
	10  TestAudioKit                        0x0000000100301c06 $S8AudioKitAAC7connect_2to7fromBus6formatySo11AVAudioNodeC_SaySo0H15ConnectionPointCGSiSo0H6FormatCSgtFZTf4nnnnd_n + 1990
	11  TestAudioKit                        0x000000010022def8 $S8AudioKit8AKOutputPAAE7connect2to3busAA7AKInput_pAaG_p_SitFAA18AKPeriodicFunctionC_Tg5Tf4nnn_g + 616
	12  TestAudioKit                        0x00000001002301d9 $S8AudioKit8AKOutputPAAE7connect2to3busAA7AKInput_pAaG_p_SitFSo16AVAudioInputNodeC_Tg5Tf4nnn_g + 9
	13  TestAudioKit                        0x000000010019cbec $S8AudioKit12AKMicrophoneCACycfc + 588
	14  TestAudioKit                        0x000000010019cc1f $S8AudioKit12AKMicrophoneCACycfcTo + 15
	15  TestAudioKit                        0x00000001000028b6 $S12TestAudioKit11AppDelegateCACycfc + 54
	16  TestAudioKit                        0x0000000100002983 $S12TestAudioKit11AppDelegateCACycfcTo + 19
	17  AppKit                              0x00007fff3b5e3322 -[NSClassSwapper initWithCoder:] + 584
	18  Foundation                          0x00007fff403ae1c1 _decodeObjectBinary + 2449
	19  Foundation                          0x00007fff403ad717 _decodeObject + 246
	20  Foundation                          0x00007fff403ad613 -[NSKeyedUnarchiver decodeObjectForKey:] + 205
	21  AppKit                              0x00007fff3b59734b -[NSNibConnector initWithCoder:] + 96
	22  AppKit                              0x00007fff3b5971d3 -[NSNibOutletConnector initWithCoder:] + 76
	23  Foundation                          0x00007fff403ae1c1 _decodeObjectBinary + 2449
	24  Foundation                          0x00007fff403afb25 -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:] + 1684
	25  Foundation                          0x00007fff403af0bc -[NSArray(NSArray) initWithCoder:] + 196
	26  Foundation                          0x00007fff403ae1c1 _decodeObjectBinary + 2449
	27  Foundation                          0x00007fff403ad717 _decodeObject + 246
	28  Foundation                          0x00007fff403ad613 -[NSKeyedUnarchiver decodeObjectForKey:] + 205
	29  AppKit                              0x00007fff3b595de8 -[NSIBObjectData initWithCoder:] + 200
	30  Foundation                          0x00007fff403ae1c1 _decodeObjectBinary + 2449
	31  Foundation                          0x00007fff403ad717 _decodeObject + 246
	32  Foundation                          0x00007fff403ad613 -[NSKeyedUnarchiver decodeObjectForKey:] + 205
	33  AppKit                              0x00007fff3b595b8d loadNib + 317
	34  AppKit                              0x00007fff3b5950a9 +[NSBundle(NSNibLoading) _loadNibFile:nameTable:options:withZone:ownerBundle:] + 696
	35  AppKit                              0x00007fff3b594cee -[NSBundle(NSNibLoading) loadNibNamed:owner:topLevelObjects:] + 204
	36  AppKit                              0x00007fff3b594aaf +[NSBundle(NSNibLoading) loadNibNamed:owner:] + 447
	37  AppKit                              0x00007fff3b588d84 NSApplicationMain + 505
	38  TestAudioKit                        0x0000000100002a3d main + 13
	39  libdyld.dylib                       0x00007fff6b0e3085 start + 1
)
2018-10-27 22:57:55.873559-0700 TestAudioKit[14733:224871] *** Terminating app due to uncaught exception 'com.apple.coreaudio.avfaudio', reason: 'required condition is false: format.sampleRate == hwFormat.sampleRate'
*** First throw call stack:
(
	0   CoreFoundation                      0x00007fff3e10443d __exceptionPreprocess + 256
	1   libobjc.A.dylib                     0x00007fff6a015720 objc_exception_throw + 48
	2   CoreFoundation                      0x00007fff3e11f08e +[NSException raise:format:arguments:] + 98
	3   AVFAudio                            0x00007fff3a18bbac _Z19AVAE_RaiseExceptionP8NSStringz + 156
	4   AVFAudio                            0x00007fff3a191bbb _Z11_AVAE_CheckPKciS0_S0_b + 323
	5   AVFAudio                            0x00007fff3a1df053 _ZN17AVAudioIONodeImpl15SetOutputFormatEmP13AVAudioFormat + 349
	6   AVFAudio                            0x00007fff3a1bf773 _ZN18AVAudioEngineGraph8_ConnectEP19AVAudioNodeImplBaseS1_jjP13AVAudioFormat + 1653
	7   AVFAudio                            0x00007fff3a1c329e _ZN18AVAudioEngineGraph22ConnectMultipleOutputsEP11AVAudioNodeP7NSArraymP13AVAudioFormat + 3370
	8   AVFAudio                            0x00007fff3a1e75d7 _ZN17AVAudioEngineImpl22ConnectMultipleOutputsEP11AVAudioNodeP7NSArraymP13AVAudioFormat + 673
	9   AVFAudio                            0x00007fff3a1e72ee -[AVAudioEngine connect:toConnectionPoints:fromBus:format:] + 94
	10  TestAudioKit                        0x0000000100301c06 $S8AudioKitAAC7connect_2to7fromBus6formatySo11AVAudioNodeC_SaySo0H15ConnectionPointCGSiSo0H6FormatCSgtFZTf4nnnnd_n + 1990
	11  TestAudioKit                        0x000000010022def8 $S8AudioKit8AKOutputPAAE7connect2to3busAA7AKInput_pAaG_p_SitFAA18AKPeriodicFunctionC_Tg5Tf4nnn_g + 616
	12  TestAudioKit                        0x00000001002301d9 $S8AudioKit8AKOutputPAAE7connect2to3busAA7AKInput_pAaG_p_SitFSo16AVAudioInputNodeC_Tg5Tf4nnn_g + 9
	13  TestAudioKit                        0x000000010019cbec $S8AudioKit12AKMicrophoneCACycfc + 588
	14  TestAudioKit                        0x000000010019cc1f $S8AudioKit12AKMicrophoneCACycfcTo + 15
	15  TestAudioKit                        0x00000001000028b6 $S12TestAudioKit11AppDelegateCACycfc + 54
	16  TestAudioKit                        0x0000000100002983 $S12TestAudioKit11AppDelegateCACycfcTo + 19
	17  AppKit                              0x00007fff3b5e3322 -[NSClassSwapper initWithCoder:] + 584
	18  Foundation                          0x00007fff403ae1c1 _decodeObjectBinary + 2449
	19  Foundation                          0x00007fff403ad717 _decodeObject + 246
	20  Foundation                          0x00007fff403ad613 -[NSKeyedUnarchiver decodeObjectForKey:] + 205
	21  AppKit                              0x00007fff3b59734b -[NSNibConnector initWithCoder:] + 96
	22  AppKit                              0x00007fff3b5971d3 -[NSNibOutletConnector initWithCoder:] + 76
	23  Foundation                          0x00007fff403ae1c1 _decodeObjectBinary + 2449
	24  Foundation                          0x00007fff403afb25 -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:] + 1684
	25  Foundation                          0x00007fff403af0bc -[NSArray(NSArray) initWithCoder:] + 196
	26  Foundation                          0x00007fff403ae1c1 _decodeObjectBinary + 2449
	27  Foundation                          0x00007fff403ad717 _decodeObject + 246
	28  Foundation                          0x00007fff403ad613 -[NSKeyedUnarchiver decodeObjectForKey:] + 205
	29  AppKit                              0x00007fff3b595de8 -[NSIBObjectData initWithCoder:] + 200
	30  Foundation                          0x00007fff403ae1c1 _decodeObjectBinary + 2449
	31  Foundation                          0x00007fff403ad717 _decodeObject + 246
	32  Foundation                          0x00007fff403ad613 -[NSKeyedUnarchiver decodeObjectForKey:] + 205
	33  AppKit                              0x00007fff3b595b8d loadNib + 317
	34  AppKit                              0x00007fff3b5950a9 +[NSBundle(NSNibLoading) _loadNibFile:nameTable:options:withZone:ownerBundle:] + 696
	35  AppKit                              0x00007fff3b594cee -[NSBundle(NSNibLoading) loadNibNamed:owner:topLevelObjects:] + 204
	36  AppKit                              0x00007fff3b594aaf +[NSBundle(NSNibLoading) loadNibNamed:owner:] + 447
	37  AppKit                              0x00007fff3b588d84 NSApplicationMain + 505
	38  TestAudioKit                        0x0000000100002a3d main + 13
	39  libdyld.dylib                       0x00007fff6b0e3085 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

What stands out is reason: 'required condition is false: format.sampleRate == hwFormat.sampleRate'

I also tried downloading the AudioKit Playgrounds to make sure that I still wasn't doing anything wrong. When I try to run the Tracking Microphone Input, the code also serves up a stack trace. However, this stack trace is different:

error: Execution was interrupted, reason: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0).
The process has been left at the point where it was interrupted, use "thread return -x" to return to the state before expression evaluation.

* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)
  * frame #0: 0x00007fff3b9ae18f AppKit`-[NSApplication _crashOnException:] + 109
    frame #1: 0x00007fff3b9ae072 AppKit`-[NSApplication reportException:] + 939
    frame #2: 0x00007fff3ba6feb7 AppKit`uncaughtErrorProc + 157
    frame #3: 0x00007fff3e17b2e1 CoreFoundation`__handleUncaughtException + 775
    frame #4: 0x00007fff6a017c81 libobjc.A.dylib`_objc_terminate() + 91
    frame #5: 0x00007fff68819dfe libc++abi.dylib`std::__terminate(void (*)()) + 8
    frame #6: 0x00007fff68819be2 libc++abi.dylib`__cxxabiv1::failed_throw(__cxxabiv1::__cxa_exception*) + 27
    frame #7: 0x00007fff6880cbb9 libc++abi.dylib`__cxa_throw + 113
    frame #8: 0x00007fff6a01585a libobjc.A.dylib`objc_exception_throw + 362
    frame #9: 0x00007fff3e11f08e CoreFoundation`+[NSException raise:format:arguments:] + 98
    frame #10: 0x00007fff3a18bbac AVFAudio`AVAE_RaiseException(NSString*, ...) + 156
    frame #11: 0x00007fff3a191bbb AVFAudio`_AVAE_Check(char const*, int, char const*, char const*, bool) + 323
    frame #12: 0x00007fff3a1df053 AVFAudio`AVAudioIONodeImpl::SetOutputFormat(unsigned long, AVAudioFormat*) + 349
    frame #13: 0x00007fff3a1bf773 AVFAudio`AVAudioEngineGraph::_Connect(AVAudioNodeImplBase*, AVAudioNodeImplBase*, unsigned int, unsigned int, AVAudioFormat*) + 1653
    frame #14: 0x00007fff3a1c329e AVFAudio`AVAudioEngineGraph::ConnectMultipleOutputs(AVAudioNode*, NSArray*, unsigned long, AVAudioFormat*) + 3370
    frame #15: 0x00007fff3a1e75d7 AVFAudio`AVAudioEngineImpl::ConnectMultipleOutputs(AVAudioNode*, NSArray*, unsigned long, AVAudioFormat*) + 673
    frame #16: 0x00007fff3a1e72ee AVFAudio`-[AVAudioEngine connect:toConnectionPoints:fromBus:format:] + 94
    frame #17: 0x000000010ba11f16 AudioKitPlaygrounds`function signature specialization <Arg[4] = Dead> of static AudioKit.AudioKit.connect(_: __C.AVAudioNode, to: Swift.Array<__C.AVAudioConnectionPoint>, fromBus: Swift.Int, format: Swift.Optional<__C.AVAudioFormat>) -> () + 1990
    frame #18: 0x000000010b931be8 AudioKitPlaygrounds`function signature specialization <Arg[18446744073709551615] = Owned To Guaranteed> of generic specialization <AudioKit.AKPeriodicFunction> of (extension in AudioKit):AudioKit.AKOutput.connect(to: AudioKit.AKInput, bus: Swift.Int) -> AudioKit.AKInput + 616
    frame #19: 0x000000010b933ec9 AudioKitPlaygrounds`function signature specialization <Arg[18446744073709551615] = Owned To Guaranteed> of generic specialization <__C.AVAudioInputNode> of (extension in AudioKit):AudioKit.AKOutput.connect(to: AudioKit.AKInput, bus: Swift.Int) -> AudioKit.AKInput + 9
    frame #20: 0x000000010b88beac AudioKitPlaygrounds`AudioKit.AKMicrophone.init() -> AudioKit.AKMicrophone + 588
    frame #21: 0x000000010b88bedf AudioKitPlaygrounds`@objc AudioKit.AKMicrophone.init() -> AudioKit.AKMicrophone + 15
    frame #22: 0x000000010bf2d057 $__lldb_expr5`main at Tracking Microphone Input.xcplaygroundpage:6
    frame #23: 0x000000010648c1a0 com.apple.dt.Xcode.PlaygroundStub-macosx
    frame #24: 0x00007fff3e059f8c CoreFoundation`__invoking___ + 140
    frame #25: 0x00007fff3e059e5f CoreFoundation`-[NSInvocation invoke] + 311
    frame #26: 0x00007fff3e0bb53d CoreFoundation`-[NSInvocation invokeWithTarget:] + 56
    frame #27: 0x00007fff6715abf5 ViewBridge`__68-[NSVB_ViewServiceImplicitAnimationDecodingProxy forwardInvocation:]_block_invoke_2 + 46
    frame #28: 0x00007fff6711fec6 ViewBridge`-[NSViewServiceMarshal withHostWindowFrameAnimationInProgress:perform:] + 53
    frame #29: 0x00007fff6715abbe ViewBridge`__68-[NSVB_ViewServiceImplicitAnimationDecodingProxy forwardInvocation:]_block_invoke + 113
    frame #30: 0x00007fff3b637731 AppKit`+[NSAnimationContext runAnimationGroup:] + 55
    frame #31: 0x00007fff3b6376e7 AppKit`+[NSAnimationContext runAnimationGroup:completionHandler:] + 82
    frame #32: 0x00007fff6717d154 ViewBridge`runAnimationGroup + 295
    frame #33: 0x00007fff6715a695 ViewBridge`+[NSVB_View _animateWithAttributes:animations:completion:] + 490
    frame #34: 0x00007fff6715ab28 ViewBridge`-[NSVB_ViewServiceImplicitAnimationDecodingProxy forwardInvocation:] + 206
    frame #35: 0x00007fff3e0a380e CoreFoundation`___forwarding___ + 780
    frame #36: 0x00007fff3e0a3478 CoreFoundation`__forwarding_prep_0___ + 120
    frame #37: 0x00007fff3e059f8c CoreFoundation`__invoking___ + 140
    frame #38: 0x00007fff3e059e5f CoreFoundation`-[NSInvocation invoke] + 311
    frame #39: 0x00007fff3e0bb53d CoreFoundation`-[NSInvocation invokeWithTarget:] + 56
    frame #40: 0x00007fff67122973 ViewBridge`-[NSVB_QueueingProxy forwardInvocation:] + 324
    frame #41: 0x00007fff3e0a380e CoreFoundation`___forwarding___ + 780
    frame #42: 0x00007fff3e0a3478 CoreFoundation`__forwarding_prep_0___ + 120
    frame #43: 0x00007fff3e059f8c CoreFoundation`__invoking___ + 140
    frame #44: 0x00007fff3e059e5f CoreFoundation`-[NSInvocation invoke] + 311
    frame #45: 0x00007fff3e0bb53d CoreFoundation`-[NSInvocation invokeWithTarget:] + 56
    frame #46: 0x00007fff3e0a380e CoreFoundation`___forwarding___ + 780
    frame #47: 0x00007fff3e0a3478 CoreFoundation`__forwarding_prep_0___ + 120
    frame #48: 0x00007fff3e059f8c CoreFoundation`__invoking___ + 140
    frame #49: 0x00007fff3e059e5f CoreFoundation`-[NSInvocation invoke] + 311
    frame #50: 0x00007fff670ef6cd ViewBridge`__deferNSXPCInvocationOntoMainThread_block_invoke + 237
    frame #51: 0x00007fff670e4af3 ViewBridge`__wrapBlockWithVoucher_block_invoke + 37
    frame #52: 0x00007fff670e48a4 ViewBridge`__deferBlockOntoMainThread_block_invoke_2 + 553
    frame #53: 0x00007fff3e087ca7 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12
    frame #54: 0x00007fff3e04aced CoreFoundation`__CFRunLoopDoBlocks + 395
    frame #55: 0x00007fff3e04a3eb CoreFoundation`__CFRunLoopRun + 1204
    frame #56: 0x00007fff3e049ce4 CoreFoundation`CFRunLoopRunSpecific + 463
    frame #57: 0x00007fff3d2e3895 HIToolbox`RunCurrentEventLoopInMode + 293
    frame #58: 0x00007fff3d2e34d4 HIToolbox`ReceiveNextEventCommon + 371
    frame #59: 0x00007fff3d2e3348 HIToolbox`_BlockUntilNextEventMatchingListInModeWithFilter + 64
    frame #60: 0x00007fff3b5a095b AppKit`_DPSNextEvent + 997
    frame #61: 0x00007fff3b59f6fa AppKit`-[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1362
    frame #62: 0x00007fff670ed226 ViewBridge`-[NSViewServiceApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 92
    frame #63: 0x00007fff3b59975d AppKit`-[NSApplication run] + 699
    frame #64: 0x00007fff3b588e97 AppKit`NSApplicationMain + 780
    frame #65: 0x00007fff6b319f1f libxpc.dylib`_xpc_objc_main + 612
    frame #66: 0x00007fff6b3199e5 libxpc.dylib`xpc_main + 433
    frame #67: 0x00007fff670dea76 ViewBridge`-[NSXPCSharedListener resume] + 16
    frame #68: 0x00007fff670e7a03 ViewBridge`NSViewServiceApplicationMain + 2877
    frame #69: 0x000000010648c1ca com.apple.dt.Xcode.PlaygroundStub-macosx`main + 42
    frame #70: 0x00007fff6b0e3085 libdyld.dylib`start + 1
    frame #71: 0x00007fff6b0e3085 libdyld.dylib`start + 1

Because even the Playground fails, my inclination is to believe that this is an AudioKit issue and not an implementation issue. Any ideas what this might be stemming from or ways to fix?

18 Answers

✔️Accepted Answer

Sounds good.

For anyone else who may be experiencing this issue with this version (4.5.2), I was able to fix the crash by writing AKSettings.sampleRate = AudioKit.engine.inputNode.inputFormat(forBus: 0).sampleRate before I initialized my microphone (from code found here: a69b249#diff-0345b5e840a1686dfc15209bac76c73bL77)

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Hey guys I fought with this for the better part of a day For some strange reason there are no tutori...
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flutter Issue with cloud_firestore - Cannot fit requested classes in a single dex file.
As a workaround you can try enabling mutlidex for Android App by following Enable multidex for apps ...
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flutter D8: Program type already present: io.flutter.BuildConfig
@smrucv I received the same error but after flutter clean and flutter packages get everything works ...
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CocoaPods pod install has bug
Did you try: sudo arch -x86_64 gem install ffi And run: arch -x86_64 pod install instead of pod inst...
246
sheetjs How to simply export a Worksheet to xlsx?
There are two issues: each object is mapped to a row so if you want a row with name John and city Se...
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flutter Introduction of characters package causes crash on flutter run for preexisting Flutter applications
In my case I resolved the issue with flutter clean After e0ed12c I get this error when building: @ju...
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nativescript cli TNS doctor doesn't recognize Xcode (High Sierra)
HI @philipfeldmann Can yhou please run xcodebuild -version and paste the output? May be Xcode is ins...
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flutter Making Network http error SocketException: Failed host lookup
@hoc081098 Double-check / make sure you have <uses-permission android:name=android.permission.INTERN...
216
flutter Support inlining Android/iOS views
iOS view embedding support has landed on master This is still just a preview There are multiple open...