Addicted to Fun and Learning
- Mar 30, 2019
The aforementioned JICO 3% THD claim opened the door to the possibility for verifiable measurements. In many ways I now better appreciate, the benchmark is a rabbit hole, sorry @morillon, fraught with issues. In January 2016, I met Hans Weedon, who holds crucial patents for logarithmic analog-to-digital conversion, from when he was at Analogic Corporation. We spent 10 days together and have communicated since. He regaled me with many stories about these AD devices, the pros and cons, the flaws, and about audio in general. He knew of my passion for vinyl records and my hobby of converting the music from them to digital formats. Because he tested such things, he shared with me that he took new and pristine vinyl records and measured their frequency response on the first play and subsequent plays. He noted that after one single play, a vinyl record loses forever its highest frequencies – likely inaudible to humans. Subsequent plays further degrade records, but to an increasingly lower degree. AC had the necessary equipment to make these measurements. I though we could measure those trends with some work, especially after seeing the skills developed herein. That, perhaps naively, is why we captured 96/24 dubs of three sides of vinyl.
My read from @JP, @USER, and @morillon is that task is much, much easier said than done.
You are likely not going to get conclusive results, but that's OK. Why all the pressure??? This is an imperfect and dying medium anyways. Have some fun. Even if you get conclusive results the average (forum) vinyl user is screwing something else up anyways. The public has very little knowledge of the medium and all I read on forums are old wives tales from people that I would never ever take seriously. Even the info quoted I would never take seriously. That's why I'm here. (And here specifically, I don't even bother with non- measurement or technically based turntable discussion on ASR! Have you seen the silliness? Eww.) I neither expect nor want people to take my opinions seriously either but if I can offer simple, well-done measurements then I feel as though I am actually contributing something. I am the least technically-minded person here and I am merely taking advantage of the incredible work being done by folks like JP in order to do some very minor grunt work that is within extremely limited parameters. Nonetheless I am seeing surprising results (that often run counter to accepted knowledge) and this is why I encourage others to run the measurements I am conducting myself.
Get whatever evidence you can and proceed from there. I think that Ray's images are going to be helpful so that's a big win in my book. More, and I don't mean this lightly, JP's script is absolutely revolutionary. After all this time the general public finally has an opportunity to measure the most important variables that influence what we we hear and how we like it. It's a shame it is only possible now when the medium is on its last legs (a good test record that can meet our current measuring technology will never be made), nonetheless digitizing and measuring to some degree is now pretty much democratized. If you do this right, you will still be contributing something even if its imperfect (just do it right, lol).