Machina Dynamica New Dark Matter CD and Blu Ray tray treatment?


This is a set of adhesive-backed thin plastic pieces that one attaches to one’s transport or player disc tray. The disk rests on them during non-spin mode, but presumably don’t touch the applied thin pieces during playback mode. The company says the new Dark Matter pieces reduces background scattered light from reaching the photodetector, thereby improving performance. 

Anyone tried this product? Please specify transport or player if you have and your impressions. 
celander

Showing 50 responses by celander

04-04-2019 9:02pmGeoff wrote:

"When the laser beam is over a “land” the full reflected signal is registered by the photodetector for that short period of time."

Are you certain about that claim, professor? What if it is only 1/3 of the reflected signal? What happens to the remainder 2/3 of the reflected signal?
Someone said on a blog that red visible and IR wavelength light could be absorbed by vanadium dioxide impregnated films. Exposed camera film might work, as claimed by some. 
Since blu-ray players use 405 nm lasers, lemon yellow should take out the invisible and visible light in that range.
Phytochromes have nearly perfect absorption characteristics for absorbing both Violet/UV and Red/IR bandwidths. The lambda max is substantially greater in the Red/IR region than that in the Violet/UV region.
Well, some combination of yellow mixed with an organic compound that absorbs UV light bandwidths. There are plenty of organic dyes that absorb in that region (UV). I used to work with them in Advanced Photochemistry Research as an undergraduate.   
Reading comprehension is helpful; believing what one can Google is not helpful. Go look at a UV-Vis absorption spectrum for phytochromes. Then re-read my post.
As a guy having a Ph.D. in Biophysics from Harvard, I find it nice being marginalized by one who is not.
I never advise anyone on how to do their reporting. Something called a first amendment (to the extent moderated by the powers that be here) is in play..
Geoff, NDM is good...but not the panacea you claim. There will always be a better mouse trap, as your own empirical research-driven products demonstrate.
And I only bring up phytochromes for their unique special properties, not as a substitute for NDM. It’s the geek in me. Like MG, I couldn’t care less about the mechanism whereby NDM works.
It’s now clear to me that one must wake up pretty early to beat Geoff to posting here. 
Here is my room hit list for Friday morning at AXPONA 2019:

16-Aster: Shelter
384: Schiit
354: Fern & Roby
362: ATC/Lone Mountain Audio
442-444: Glenn Poor/Technics
452: Aesthetix
478: CPT A/V; Emerald Physics
552: Xact Audio
546: Linear Tube Audio
606: Linear Tube Audio
652: CAT
670: Benchmark Media Systems
696: Linear Tube Audio
1429: Sanders Sound Systems
1440: Durand Tonearms & Evolution Acoustics
1480: AGD Productions
8415: Linear Tube Audio
8470: Etymotic Research
9424: Mag-Lev Audio

Hope to see some of you in the rooms!
Dan
04-08-2019 3:48pm, celander wrote:

“Uber, the nice nice padded walls in that room are actually acoustic room treatments.”

I must have had too many cups of coffee today. I meant to say:

“Uber, the NICELY padded walls in that room are actually acoustic room treatments.”
Uber, the nice nice padded walls in that room are actually acoustic room treatments.
We can discuss cables here, if you want. In fact, I just affixed two NDM thingies to my DAC output IC’s going to my Teo Audio Liquid Pre passive preamp. Huge boost in inner detail and space from my ATC SCM20-2 active monitors..

I can’t wait to affix a few NDM thingies to my analog turntable platters..
If you attach a single NDM thingy to each ear lobe, then be prepared to be blown away with the improvement in SQ of your audio system.
I disagree about the ease of leaving a Harvard program. Some graduate student in a Harvard Chinese History PhD graduate studies program could not find a “real world” job. So he simply stayed in graduate school as a teaching assistant. In that program for at least 23 years...
I perceive no secret passwords, nor do I acknowledge that females cannot participate.
I was wondering how that penultimate post would be addressed to avoid becoming the death knell of this thread.
☝🏻 +1 for clarity, @glupson

This thread leads “recent activity” in the forum!
Glupson, you are correct. Editorial accuracy matters. By all digital players, I think Geoff was attempting to capture all conventional CD, DVD, Blu-ray and related players. 
04-11-2019 4:08pm
Geoff wrote:

“>>>>That’s weird. I see some of my posts here dated as far back as 2002. Were those posts really mine and if so were they legal?”

I see that now. But A’gon must have discounted those earlier contributions.
Anybody else tried NDM? Please chime in now before this thread loses all relevancy..
I may need to order a second NDM kit before the crush of new orders hits Geoff’s site. (And before the obligatory price increase hits the product.)
04-11-2019 3:38pm  
Geoff wrote:

@celander I’ve been no. 1 here for ten years. I kind doubt I’ll be going anywhere, ol buddy.

I didn’t realize it’s 2022 AD. 
OMG, consider the ramifications of  mapman’s suggestion: 

Geoff sends NDM sample off to Stereophile for review —> Stereophile gives NDM a rave review —> Geoff slammed with NDM orders —> Geoff sets up his own NDM blog/vlog site to support the NDM sales —> Geoff never posts on the A’gon forums again. [Insert “My Pillow” commercial background music here..]

We will miss ya, ol’ buddy! 😥