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Not sure what to make of this:
View YouTube Video
Big J
"... only a very few individuals understand as yet that personal salvation is a contradiction in terms."
Follow Ups:
i am sure they will determine which is the best scenario for arc correction or not. but i am surprised nobody thought of this before nor acted on it if they did.
...regards...tr
I think he was really just illustrating that they have the capability of doing whatever they want with their HD stamper. However, to me, if they are serious in implementing that particular "correction" that they are introducing an unnecessary step that potentially makes things "worse" rather than better for many people.
By this, I mean that even for people trying to align to the "reference" arc of the HD stamper, not everyone will be able to achieve it due to inaccuracies. So even for those people, depending on what the offset and/or overhang errors are, they may actually end up with something that sounds worse in portions of the record, than if the record were cut with a tangential specification. In other words, it would be good in theory, but perhaps not so successful in practice.
I went to incredible lengths to be able achieve an accurate alignment using the equipment available to me at work and home. I worked out realistic repeatibility errors and they were quite soberingly "signficant" without verification of the result many times via different means. I was able to make the jig to an accuracy of better than 10um. However, the practical uncertainty on the overhang is about 4 to 5 times that figure after exercising great care. Offset angle error is the hardest to minimise especially with tapered cantilevers.
To cater for all requirements, they would "have to" produce 2 versions - one suitable for tangential tracking arms (or for others who have chosen something OTHER than the shorter IEC modulation envelope). However, realistically, they probably would stick to one or the other and hope that most people reap the benefit.
Apart from that, I think they have the right idea in simplifying the manufacturing process and improving the consistency of the stamper and I think it is a very exciting prospect despite my reservations.
Regards Anthony
"Beauty is Truth, Truth Beauty.." Keats
hwere at the LAAudio Show, i asked kevin gray about this and he said that doesn't believe that it's a viable process at this time with these materials.
...regards...tr
I guess Kevin would be keeping a close eye on developments given that it has the potential to be a disruptive technology to his business. Even if it WAS technically feasible, that uptake would be very slow to become mainstream. Just like DMM, I should imagine that you would get audiophiles who would "prefer" the sound from a conventional lacquer sourced master!
Regards Anthony
"Beauty is Truth, Truth Beauty.." Keats
What a coincidence, I just saw that over the weekend myself!
The basic premise is exciting, but one of their proposals is concerning to me.
I'm not keen on the compensation for tracking error which they claimed to be offering. Different manufacturers choose different standard alignments and there is no single "best" alignment since it depends on the range of records the end-user chooses to play. The IEC 66, 121 nulls might be taken as the closest to a "standard". However, I personally prefer the 63.5, 119 nulls for LP. VPI have their own alignment... as does Technics.... Getting alignment "correct" even with the right tools with respect to one of the options is not necessarily going to be perfect and with different optimisations depending on the modulation envelope chosen, this could actually introduce WORSE distortions than we currently have.
I made my own linear offset jig with 4 different optimisations (three for LPs (Stevenson 1A, 1B and IEC) and one for 7inch and 10inchs). I would prefer they stick to doing a tangential "cut" with the modelling and leave it up to the customer to "get it right" for playback.
I also see little point in cutting such a wide bandwidth - they still need to account for recorded groove wavelength and stylus profile as limiting factors.
On a side note, I recently transcribed my old LP of Sgt Pepper and was shocked that the spectral content extends up to at least 50kHz (I'm only doing 24/96)!! I didn't think they would have recorded that bandwidth let alone cut it back then.
Regards Anthony
"Beauty is Truth, Truth Beauty.." Keats
I hear you.
I hope they continue to experiment and have test runs before making any hard and fast standards for their process. It's likely that what works for them may not work for a decent community sample.
It's delightful to learn that the spectral analysis you conducted produced that surprise result. Makes me happy that I still prioritise vinyl in my music collection - and will for some time.
Big J
"... only a very few individuals understand as yet that personal salvation is a contradiction in terms."
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