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Ever wondered why you sometimes have to wait months after an album's launch to get the music on vinyl? It's not necessarily because the label hates vinyl — in many cases, it's because the decades-old manufacturing process can't keep up with the format's resurgence. Relief may be in sight for turntable fans, though. Viryl Technologies is producing a pressing machine system, WarmTone, that should drag vinyl production into the modern era.
Much of WarmTone's improvement rests in its use of modern engineering. It's more reliable when producing the "pucks" that become records, makes it easier to switch out stampers (the negatives that press records) and sports a trimming/stacking system that can better handle large-scale production. Also, there's a raft of sensors -- the machine checks everything from pressure to temperature to timing, so companies will immediately know if something goes wrong.
Logically, the interface has been spruced up as well. Touchscreens help control the pressing machine on-site, and workers can check on the state of the machine from their computer or phone.
Source:
https://www.engadget.com/2017/01/29/vinyl-record-production-tech-upgrade/
(Score: 2) by Scruffy Beard 2 on Monday February 06 2017, @07:05PM
Do you even nyquist [wikipedia.org]?
TL;DR: If your clock source is good enough, you can get perfect reproduction (assuming an infinite number of samples).
(Score: 2) by Scruffy Beard 2 on Monday February 06 2017, @07:07PM
Nyquist–Shannon sampling theorem [wikipedia.org]
Actual article I was trying to link to.
(Score: 2) by mcgrew on Monday February 06 2017, @08:56PM
The key there is "infinite number of samples." forty four samples per second is most certainly not infinite, or its Nyquist limit of 22kHz, the reason all harmonics above 20kHz are taken out. Above the Nyquist limit you get horrible, audible, loud noise. I posit that harmonics above a person's hearing affect the audible signal, making the sample sound dead, artificial.
mcgrewbooks.com mcgrew.info nooze.org
(Score: 3, Interesting) by Scruffy Beard 2 on Monday February 06 2017, @09:21PM
Harmonics above the nyquist frequency do affect the signal (causing aliasing). That is why you filter them out. With a higher sample rate, I will concede that you can move the audio filtering into the digital domain: allowing almost an almost ideal pass-band.
And yes, 44,000 samples per second can be infinite. The longer you record, the closer to an ideal approximation you will get. Clock error probably dominates after a million samples (23 seconds) or so though.
(Score: 2) by mcgrew on Wednesday February 08 2017, @04:46PM
Look at it on a graph. The cutoff of 20 kHz is because 44kHz is by no means infinite. A quintillion samples per second still isn't infinite. The only "infinite" sampling rate is analog.
mcgrewbooks.com mcgrew.info nooze.org
(Score: 1) by Scruffy Beard 2 on Wednesday February 08 2017, @07:46PM
To use an analogy: there are infinite real numbers between 1 and 2. However, that does not imply that the sequence of integers is not infinite.
Analog sampling may not be as infinite [wikipedia.org] as you think. I am fairly sure the noise described in that article is caused by the random motion of electrons in matter making up the circuit.
(Score: 2) by mcgrew on Friday February 10 2017, @02:28AM
Actually, tape is certainly not infinite, no more than photographic film The oxide on the tape is made of tiny particles, just like the silver grains on film, and vinyl is recorded from either analog tape or a computer's a/d output.
mcgrewbooks.com mcgrew.info nooze.org
(Score: 0) by Anonymous Coward on Tuesday February 07 2017, @04:22AM
Sounds great but it contradicts about a century of experimental evidence. You wouldn't have any such evidence yourself, would you?