1) they were *recorded* at equal volume, according to Puget Sounds. Lavorgna did not verify that *play back* on his rig was in fact level matched.
2) 'taking off your glasses' is a rather casual method of 'blinding' (and at best, *single* blinding). And for all the detail Lavorgna gave about his rig, he gave very little detail about his 'blind' listening 'test'. It seemed almost an afterthought.
3) The fact that 'unscientific impressions' fall in line with Lavorgna's is no more impressive than the fact people tend to prefer the pricier of two wines even when they're in fact both the same wine. When people believe going in that one audio format is 'high resolution' and the other isn't, that is very likely to color their 'unscientific impressions' of what they hear. And those people are not using *just* their ears to judge..unless, of course, they are participating in a real blind test.
On 12/29/12 14:45, August Bleed wrote:
It seems to indicate he used test tones to ensure that the audio was at equal volume and the same equipment. I'm afraid I don't understand your criticism of an unscientific comparison of word length and sampling rates. He pretty much says this when he indicates his 'blind' testing meant he took off his glasses. It seems to be one man's opinion-and is represented as such. It's worth noting that his unscientific impressions seem to fall in line with what the vast majority of folks hear when they listen to these different versions if you use CA or this forum as small examples--with their unique equipment choices and such. Unscientific? Sure. Invalid? Only if you're not using your ears.
On Sat, Dec 29, 2012 at 11:10 AM, Steven Sullivan <ssully@panix.com> wrote:
I would expect small differences to be more difficult to perceive in surround, based on previous psychoacoustics work (see Floyd Toole's book)
But Lavorgna's article has basic flaws. His 'blind test' was inadequately blinded, and apparently there was no attempt to confirm levels were matched. And presto, higher numbrs = better sound. Audiophile preconceptions confirmed again! He also takes the Meridian quote about Redbook being 'inadequate' out of context. And he fails to mention that the Meridian white paper contains zero, nada, no listening test data. As a historical sidenote, when that paper appeared in JAES, it prompted as strong critical rejoinder from other AES notables in the digital audio realm, in the letters-to-the-editor section, which in turn prompted the famous Meyer & Moran DSD vs Redbook work.
On 12/29/12 13:20, Tab Cursor wrote:
This is an interesting read. He does something I never do -- compare his audio collection in 2-channel listening. Do you think his observations also apply to surround sound?
Enjoy!
http://www.audiostream.com/content/dsd-v-pcm-file-comparison-16441-2496-24192-64x-dsd-128x-dsd--
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