Audibility of "typical" Digital Filters in a Hi-Fi Playback
Reply #55 – 2014-11-11 20:15:36
What type of dither did Meyer and Moran use? Red Herring dither. Now stick to what BS used in his landmark tests, the only relevant one, remember? The thread name is "follow-up to Meyer and Moran." What plot are you following AJ? We are comparing the two reports to see which one is valid seeing how they contradict themselves.Here is Stuart on his latest test:This [playback] level was chosen for comfort, and because it was high enough for details to be audible but also low enough that 16- bit RPDF dither would be inaudible at the listening position [30]. Very vague. What was the measured levels? It is in the report.One more time Amir, did BS's test adhere to ITU-BS1116 or BS.1534-2? The only BS test I know is the Meyer and Moran where they had not even heard of BS116 it seems. If you mean Stuart's, yes, the followed good bit of it. They deviated in some areas such as using non-expert listeners as to not get accused of results only being valid for that population.What hidden reference anchor was used? If something is hidden, you wouldn't be able to see it, right? Part of the answer was in my post.I actually like to measure the ABX/HR box also. Such boxes are used in all of these tests we hang our hat on yet none of us have any measurements or objective evaluations of them. When did you learn to measure stuff AJ? You didn't go and learn something about audio in the last year or two, did you? But no, they did not use a "box" to have measurements as such. As the line in the movie Fifth Element goes, the switching mechanism was "perfect." We chose to use undithered quantization as a probe and | although we would normally rec- ommend TPDF dither for best practice -- we con- sidered rectangular dither to be more representative of the non-ideal dither or error-feedback processing found in some commercial A/D and D/A filters. Ah, so he cherry picked. Nice. He was trying to please you AJ. Don't say he didn't do anything for you.So this has nothing to do with whether 16/44 is transparent as a playback method, but more about cherry picking a pathological case. I think the only thing pathological is interactions between you and I on forums! Are you going to offer anything informative AJ or just keep being yourself?