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this crash only occus on iOS 17.0. Crash Stack: #136 Thread SIGSEGV SEGV_ACCERR 0 AudioToolbox AQ::API::V2Impl::AllocateBuffer(OpaqueAudioQueue*, void*, unsigned int, AudioStreamPacketDescription*, unsigned int, AudioQueueBuffer**) + 772 1 AudioToolbox AQ::API::V2Impl::AllocateBuffer(OpaqueAudioQueue*, void*, unsigned int, AudioStreamPacketDescription*, unsigned int, AudioQueueBuffer**) + 584 related codes: - (instancetype)init { if (self = [super init]) { // settings int Channels = 2; int bytesPerFrame = 2 * Channels; AudioStreamBasicDescription streamDesc; streamDesc.mSampleRate = 44100; streamDesc.mFormatID = kAudioFormatLinearPCM; streamDesc.mFormatFlags = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked; streamDesc.mBytesPerPacket = bytesPerFrame; streamDesc.mFramesPerPacket = 1; streamDesc.mBytesPerFrame = bytesPerFrame; streamDesc.mChannelsPerFrame = Channels; streamDesc.mBitsPerChannel = 16; streamDesc.mReserved = 0; // queue AudioQueueNewOutput(&streamDesc, AEAudioQueueOutputCallback, (__bridge void * _Nullable)(self), nil, nil, 0, &_playQueue); AudioQueueSetParameter(_playQueue, kAudioQueueParam_Volume, 1.0); // buffers for (int i = 0; i < QUEUE_BUFFER_SIZE; i++) { AudioQueueAllocateBuffer(_playQueue, MIN_SIZE_PER_FRAME, _bufferList+i); } } return self; }