1. An audio processing system, comprising; a microphone system, comprising a microphone for capturing audio input to the microphone system; a microphone manager to (i) control capturing of audio input to the microphone system, (ii) control recording of captured audio, (iii) detect speech activity events, (iv) determine speech segments of captured audio comprising speech data based on timing of one or more detected speech activity events, (v) selectively output speech segments within captured, audio to a speech decoding system; and to (vi) detect an environmental condition regarding capturing of audio, which can result in captured audio with acoustic characteristics that adversely affect a decoding accuracy of the captured audio; a sensor system comprising one or more sensor devices to generate sensor data which is processed by the microphone manager to detect speech activity events and environmental conditions, wherein the microphone manager selectively activates one of a plurality of different types of microphones of the microphone system according to the environmental condition regarding capturing of audio, wherein the microphone manager detects an environmental condition where a speaker uses a microphone in the microphone system which is different from a microphone used by the speaker for training the speech decoding system, and wherein a selectively activated one of a plurality different types of microphones of the microphone system is the same or similar to the training microphone.