Choosing Audio method

nAudio playback library allows playback device selection and higher volumes. As well it can play messages in stereo. It also allows speech recognition device selection.

Voice recognition 'Trigger word' and 'Press and release button' not available with nAudio.

nAudio offers two output interface types - WaveOut and WASAPI. WaveOut is more compatible, but WASAPI is more responsive/direct playback.