| Of course, doing the average yourself is the recommended way, so you have full control on what's happening.
However I explain what Aurora Acoustical Parameters is really doing: the LIN results ARE NOT AVERAGED, these are simply the results obtained processing the original wide-band signal, with no octave band filtering (no filtering at all!).
Similarly, the "A" band results are obtained processing the wide-band signal with IEC-compliant A-weighting filter applied. But again, no octave bands, and no averaging...
If you select the radio button of the LIN or A columns, the chart displays the real LIN or A-weighted waveform. And pressing on the button labeled "OK - keep processed", the waveform is exported back to the host program (so you can listen to the A-weighted sound, if you like).
Of course, the same happens when selecting one of the 10 octave bands...
Finally, it is possible to force Aurora to provide an ISO-3382-compliant band-averaged result.
In the initial window of the plugin, there is a check button labelled "Average mode instead of A-weight". As the name suggests, when this check button is selected, the table of computed values contains a column labelled "Avg" instead of "A". This columns contains the standard ISO-3382 averaged results (125 to 4 kHz).
But, if the column "Avg" is selected, and the filtered data are exported back to the host program by pressing the button "OK - keep processed", the exported waveform is still A-weighted, it is not band-pass filtered in the range covered by the 6 octave bands ranging bewteen 125 and 4000 Hz, as one could expect.
This is definitely a bug which we plan to fix in future...
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