The documentation for AVAudioSession.Mode.measurement says that this mode will "minimize the amount of system-supplied signal processing to input and output signals" https://developer.apple.com/documentation/avfaudio/avaudiosession/mode-swift.struct/measurement Is there any documentation regarding specifically what processing is applied in the .default or .videoRecording modes and how it is different in .measurement mode? If my app adds its own signal processing, is it best practice to always use .measurement mode? What should I use for an app that applies its own signal processing to the audio in a video recording? Is it possible to "minimize system-supplied signal processing" while recording a video?