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Basically for this iPhone app I want to be able to record from either the built in microphone or from a connected USB audio device while simultaneously playing back processed audio on connected AirPods. It's a pretty simple AVAudioEngine setup that includes a couple of effects units. The category is set to .playAndRecord with the .allowBluetooth and .allowBluetoothA2DP options added. With no attempts to set the preferred input and AirPods connected, the AirPods mic will be used and output also goes to the AirPods. If I call setPreferredInput to either built in mic or a USB audio device I will get input as desired but then output will always go to the speaker. I don't really see a good explanation for this and overrideOutputAudioPort does not really seem to have suitable options.
Testing this on iPhone 14 Pro
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carsten_gp.
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carsten_gp.
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