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Hello,is there any way to select which input channels shall be mapped to the output with a AVAudioMixerNode?I have a inputNode with 4 channels and want to use 2 specific channel from it within my processing chain.To get an idea it looks like this:... var mixer = AVAudioMixerNode() var inputFormat = audioEngine.inputNode.inputFormat(forBus: 0) // This one has 4 channels var outputFormat = AVAudioFormat(commonFormat: inputFormat.commonFormat, sampleRate: inputFormat.sampleRate, channels: 2, interleaved: inputFormat.isInterleaved)! audioEngine.attach(mixer) audioEngine.attach(someOtherNode) audioEngine.connect(inputNode, mixer, inputFormat) audioEngine.connect(mixer, someOtherNode, outputFormat) ...Basically this works as expected but I have no choice about the channel mapping from input to output.The mixer automatically maps channel 0 and 1 from the four input channels to the two output channels.How I can I tell the mixer that it should map channel 2 and 3 to the output channels?I tried to set mixer.auAudioUnit.channelMap to [2, 3] but it did not affect anything.mixer.auAudioUnit.channelMap is always nil.Any help would be very appreciated. Thank you!Daniel

Hello,my app grabs audio from the microphone, encodes it to aac and streams it to the internet.Even though I have background audio activated it seems like at some point (3-20 minutes) after the device has been lockedmy audio tap does not receive audio samples anymore. Is that expected behaviour?Best RegardsDaniel