/**

@page na_record_manual na_record
@brief *Audio file recording*
@tableofcontents

@section synopsis Synopsis

@SYNOPSIS@

na_record records waveforms from an audio device.  It only supports
recording for N seconds (default is 10).  Specifying the frequency
defines the recording frequency (if supported by the hardware).  This
currently doesn't support NAS audio in.

@section options Options

@OPTIONS@

*/