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The voice recognition mode is enabled when using the AUDIO_SOURCE_VOICE_RECOGNITION audio recording source. The intended behavior is to use the same microphone input as the default input, but to configure the A1026 chip in the special mode tuned for voice recognition, for the matching input. For testing purposes, two settings will be available for each input, the choice of which one is used will be dependent on the vr_uses_ns property. The availability of the voice rec mode is dependent on the enable1026 system property. Note that the final A1026 configuration modes are not used yet (not available) but the ones to use are specified in the comments of the AudioHardware::doAudience_A1026_Control() function at line 952 of AudioHardware.cpp for instance. Upon availability of other presets, the enable1026 property could be used to disable or enable even more of the 1026 features.